A new trinuclear zinc complex Zns(2,2"-bipy)2(3,5-DMBA)6"(H20)1.5 (1) with 3,5-dimethylbenzoic acid (3,5-DMBA) and 2,2"-bipyridine as ligands has been synthesized in the mixed solvents of methanol and wat...A new trinuclear zinc complex Zns(2,2"-bipy)2(3,5-DMBA)6"(H20)1.5 (1) with 3,5-dimethylbenzoic acid (3,5-DMBA) and 2,2"-bipyridine as ligands has been synthesized in the mixed solvents of methanol and water. It crystallizes in the monoclinic space group C2/c with a = 31.1497(15), b = 11.7576(6), c = 20.9049(10) A, fl = 118.4550(10)°, V- 6731.4(6) A3, Dc = 1.412 g/cm3, Z = 4, F(000) = 2972, GOOF = 1.069, the final R= 0.0667 and wR= 0.1917. The whole molecule consists of three zinc ions, six 3,5-DMBA molecules, two 2,2"-bipyridine molecules and one and half water molecules, in which three zinc ions are bridged by six μ2-η1:η0 carboxylate groups of 3,5-DMBA. The Zn(1) atom is centrosymmetric, and adopts a distorted octahedral ZnO6 geometry, while the Zn(2) gives a distorted square pyramidal ZnOsN2 geometry. The spectroscopic characterization and thermal stability properties of the complex were investigated.展开更多
A homochiral complex, Zn3(Hsalen)2(Py)4(H2O)2 (salen = (1R,2R)-(-)-diamino-cyclohexane-N,N'-biscarboxyl-salicylidene) 1, has been synthesized by solvothermal procedure and characterized by IR, microanalys...A homochiral complex, Zn3(Hsalen)2(Py)4(H2O)2 (salen = (1R,2R)-(-)-diamino-cyclohexane-N,N'-biscarboxyl-salicylidene) 1, has been synthesized by solvothermal procedure and characterized by IR, microanalysis, TGA, powder and single-crystal X-ray crystallography. It crystallizes in monoclinic space group P2 with a = 10.9439(7), b = 10.1722(6), c = 27.3450(17), β = 97.5060(10)o, V = 3018.1(3) 3, Z = 2, Zn3(Hsalen)2(Py)4(H2O)2, Mr = 1363.33, Dc = 1.500 g/cm3, F(000) = 1408, μ = 1.257 mm-1, GOOF = 1.042, the final R = 0.0601 and wR = 0.1464 for 10322 observed reflections with I 2σ(I). The coordination polymer 1 possesses a 1D infinite zigzag chain architecture constructed by strong hydrogen bonding interactions and the polymeric chains are further assembled into a 2D supramolecular network structure via C–H···π interactions between the cyclohexane and aromatic rings of the ligand of adjacent chains. Simultaneously, π···π stacking interactions play an important role in forming the 2D supramolecular framework.展开更多
A new complex has been synthesized with o-methylbenzoyl-benzoic acid(HL) and 1,10-phenanthroline(phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b...A new complex has been synthesized with o-methylbenzoyl-benzoic acid(HL) and 1,10-phenanthroline(phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b = 17.7876(18), c = 19.998(2), β = 104.720(4)o, C54H48N4O11Zn, Mr = 994.33, V = 4690.2(9)3, Dc = 1.408 g/cm3, Z = 4, F(000) = 2072, μ(MoKα) = 0.59 mm-1, R = 0.0736 and wR = 0.2029. The crystal structure shows that the zinc ions are coordinated with two oxygen atoms from two HL molecules and four nitrogen atoms from two phen molecules, forming distorted octahedral coordination geometry. The fluorescent and thermal stability properties of the complex are studied. The result shows that it has one fluorescent emission band at around 412 nm. In addition, the complex is stable under 210 ℃.展开更多
Two macrocyclic zinc(Ⅱ) complexes {[ZnL(VO3)2]·0.33H2O}n(1) and [ZnL(H2O)2][Ni(CN)4](2)(L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) have been obtained from the reactions of [Z...Two macrocyclic zinc(Ⅱ) complexes {[ZnL(VO3)2]·0.33H2O}n(1) and [ZnL(H2O)2][Ni(CN)4](2)(L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) have been obtained from the reactions of [ZnL](ClO4)2 with NH4VO3 and K2[Ni(CN)4], respectively, and structurally characterized by elemental analysis, IR, XRPD, TG and X-ray diffraction. Single-crystal X-ray diffraction analyses indicated that the Zn(Ⅱ) atom lies on an inversion center and is octahedrally coordinated by four nitrogen atoms of the tetradentate macrocyclic ligand in the equatorial plane and two oxygen atoms of [VO4] tetrahedra in the axial positions in 1, and two oxygen atoms of two water molecules in 2. Complex 1 shows a three-dimensional structure, which is constructed by the links of [VO3]nn- chains with [ZnL]2+, forming one-dimensional channels occupied by guest water molecules. The monomers of [ZnL(H2O)2]2+ and [Ni(CN)4]2- are connected through the intermolecular hydrogen bonds to form a two-dimensional sheet in complex 2.展开更多
The novel complex [Zn2(Mba)3(Phen)2EtOH)]·ClO4 (Hrnba = methoxybenzoic acid, Phen = 1,10-phenanthroline, EtOH = ethanol) was synthesized by hydrothermal reactions, and its structure was determined by X-ray...The novel complex [Zn2(Mba)3(Phen)2EtOH)]·ClO4 (Hrnba = methoxybenzoic acid, Phen = 1,10-phenanthroline, EtOH = ethanol) was synthesized by hydrothermal reactions, and its structure was determined by X-ray diffraction. The crystal belongs to the triclinic system, space group Pi with a = 1.15362(1), b = 1.3655(3), c = 1.61451(1) nm, α= 72.842(2), β = 83.259(3), y = 72.083(2)°, V = 2.3112(6) nm3, Z = 2,μ(MoKa) = 11.71 cm-1, F(000) = 1120, R = 0.0552 and wR = 0.1157 (I 〉 2σ(I)). The two centric zinc(H) ions in the complex locate in a distorted octahedral coordination geometry and a distorted trigonal bipyramid coordination geometry, respectively. Two bridging bidentate carboxyl groups and a μ2-O carboxyl group from three methoxybenzoic acids act as the bridge to link two Zn(Ⅱ) ions. The asymmetric units are connected by π-π packing interactions between aromatic rings to form a three-dimensional supramolecular network. The experimental results show a good fluorescence property for the complex.展开更多
Two zinc(II) complexes, namely, [Zn(L1)Cl2]2 (1) and {[Zn(L2)(tbta)]·3H2O}n (2) (L1 = 1,3-bis(2-methylbenzimidazol-1-ylmethyl)benzene, H2tbta = tetrabromoterephthalic acid, L2 = 1,3-bis(2-methylbe...Two zinc(II) complexes, namely, [Zn(L1)Cl2]2 (1) and {[Zn(L2)(tbta)]·3H2O}n (2) (L1 = 1,3-bis(2-methylbenzimidazol-1-ylmethyl)benzene, H2tbta = tetrabromoterephthalic acid, L2 = 1,3-bis(2-methylbenzimidazol-1-yl)-2-propanol) have been successfully obtained under hydrothermal conditions. Complex 1 displays binuclear structure which is further extended into a 1D supramolecular chain through π–π stacking. Complex 2 features 2D (4,4) network based on L2/tbta2– double linker. The thermal stability, fluorescence properties and catalytic activities of two complexes for degradation of Methyl orange in a Fenton-like process were discussed.展开更多
[Zn(L)(CH3OH)3](H2L = N-(1-phenyl-3-methyl-4-propenylidene-5-pyrazolone)-salicylidene hydrazide) has been synthesized by the reaction of zinc nitrate and ligand H2 L. The complex crystallizes in orthorhombic s...[Zn(L)(CH3OH)3](H2L = N-(1-phenyl-3-methyl-4-propenylidene-5-pyrazolone)-salicylidene hydrazide) has been synthesized by the reaction of zinc nitrate and ligand H2 L. The complex crystallizes in orthorhombic system, space group Pbca with a = 5.888(15), b = 14.564(14), c = 22.20(2) , V = 5137(8) 3, Z = 8 and F(000) = 2184. The ligand serves as a negative bivalent tridentate chelating agent to coordinate with the central zinc(II) atom. DNA-binding was studied by UV-Vis spectral analysis and ethidium bromide(EB) displacement experiments. The results showed that the DNA-binding constant of the complex is 5.1×104 M–1. Antitumor activity of [Zn(L)(CH3OH)3] and the ligand have been investigated by MTT assay, which indicated that the complex has better cytotoxicity to Eca-109 and He La than free ligand.展开更多
The structure of a zinc(Ⅱ) coordination complex(1), [C14 H10 N3 O5 Zn1.5]n or [Zn1.5(bzim)(pydc)(H2 O)]n(H2 pydc = pyridine-2,3-dicarboxylic acid, Hbzim = benzimidazole), has been determined by X-ray crys...The structure of a zinc(Ⅱ) coordination complex(1), [C14 H10 N3 O5 Zn1.5]n or [Zn1.5(bzim)(pydc)(H2 O)]n(H2 pydc = pyridine-2,3-dicarboxylic acid, Hbzim = benzimidazole), has been determined by X-ray crystallography and characterized by elemental analysis, IR spectrum and luminescence. Chemical formula: C14 H10 N3 O5 Zn1.5. It crystallizes in the monoclinic system, space group P21/c with a = 12.303(4), b = 12.052(4), c = 10.212(3) ?, β = 104.147(4), V = 1468.3(8) ?3, Z = 4, Mr = 398.30, Dc = 1.802 g/cm3, F(000) = 800, μ = 2.501 mm-1 and S = 1.000. The 2-D network architecture of 1 is constructed from benzimidazole, zinc and pyridine-2,3-dicarboxylic acid. The quantum-chemical calculations have been performed on ‘molecular fragments’ extracted from the crystal structure using the B3 LYP method in Gaussian 09. The luminescence spectrum shows that complex 1 emits blue luminescence.展开更多
A novel polymeric zinc(II) complex {[Zn2(TIA)(H2O)3]·(NO3)}n(1, H3TIA = 5-(1H-tetrazol-5-yl)isophthalic acid) has been synthesized in mixed solvents under solvothermal conditions and characterized by ...A novel polymeric zinc(II) complex {[Zn2(TIA)(H2O)3]·(NO3)}n(1, H3TIA = 5-(1H-tetrazol-5-yl)isophthalic acid) has been synthesized in mixed solvents under solvothermal conditions and characterized by elemental analysis, IR spectroscopy and X-ray single-crystal diffraction. Complex 1 crystallizes in orthorhombic, space group Cmcm with a = 10.4210(6), b =23.3526(14), c = 6.9214(4)A, V = 1684.37(17)A^3, Z = 4, C9H4N5O(10)Zn2, Mr = 472.91, Dc = 1.865g/cm^3, F(000) = 932, λ(MoK α) = 2.909 mm^-1, R = 0.0423 and wR = 0.1287. The complex has good thermal stability and excellent photoluminescent property.展开更多
The title complex, mercury bridged biferrocene trinuclear complex Hg(FcL)2. Bis (S-methyl-N- (1-ferrocenyl-1-methyl) methylenedithiocarbazate) mercury,Crystallizes in space group Pbca with a =19. 510 (4), b=19. 921 (5...The title complex, mercury bridged biferrocene trinuclear complex Hg(FcL)2. Bis (S-methyl-N- (1-ferrocenyl-1-methyl) methylenedithiocarbazate) mercury,Crystallizes in space group Pbca with a =19. 510 (4), b=19. 921 (5), c=15. 581 (3)A. V=6095(3) A, Z=8,M.=863. 12, Dc=1.881 g/cm3; u=19. 24 cm-1 and F(000) = 3376. The final refinement of 2455 observed reflections is converged with R= 0. 043 and Rw=0.047. X-ray crystal structure analysis revealed that the coordinationgeometry of Hg atom is a distorted tetrahedron with two Hg-N bonds and two Hg- S bonds. The Schiff-base ligand loses a proton from its tautomeric thiol form and is cryordianted to the Hg aotm uia the mercapto sulphur and the β-nitrogen atoms.展开更多
The title zinc(Ⅱ) complex salt [Zn(H2O)6](ClO4)2-(PNOS)4, where PNOS is derived from picolinaldehyde N-oxide with semicarbazone, has been prepared and structurally characterized by X-ray single-crystal analys...The title zinc(Ⅱ) complex salt [Zn(H2O)6](ClO4)2-(PNOS)4, where PNOS is derived from picolinaldehyde N-oxide with semicarbazone, has been prepared and structurally characterized by X-ray single-crystal analysis. It crystallizes in triclinic, space group PI with a = 7.529(3), b = 10.206(4), c = 14.678(6)A, a = 86.293(6), β= 87.686(7), γ= 81.382(6)°, C28H44Cl2N16O22Zn, Mr = 1093.06, V = 1112.3(8) ,A^3 Z = 1, Dc = 1.632 g/cm^3, S = 1.089, μ(MoKa) = 0.773 mm^-1, F(000) = 564, the final R = 0.0438 and wR = 0.1076 for 3888 independent reflections with Rint = 0.0224. The crystal structure possesses a [Zn(H2O)6]^2+ cation, two ClO4^- anions and four PNOSs. In the crystal structure, Zn^2+ cation is located at the symcenter and coordinated by six water molecules. In [Zn(H2O)6]^2+, an elongate octahedral complex cation, the average Zn-O bond length is 2.087(2) A. There exist a lot of H bonds in the structure, linking the cation [Zn(H2O)6]^2+, anion ClO4^- and PNOS to form a 3D network.展开更多
Two new zinc(Ⅱ) complexes, [Zn2L2Ch].2[ZnL(CH3OH)Cl2] 1 and [ZnL2(NO3)2] 2, were synthesized by reacting ZnX2.nH2O (X = Cl^-, NO3^-) and a Schiff base ligand 2-[(4-methylphenylimino)methyl]-6-methoxyphenol ...Two new zinc(Ⅱ) complexes, [Zn2L2Ch].2[ZnL(CH3OH)Cl2] 1 and [ZnL2(NO3)2] 2, were synthesized by reacting ZnX2.nH2O (X = Cl^-, NO3^-) and a Schiff base ligand 2-[(4-methylphenylimino)methyl]-6-methoxyphenol (C15HIsNO2, L) which was obtained by the condensation of o-vanillin (2-hydroxy-3-methoxybenzaldehyde) with p-toluidine. Both 1 and 2 were characterized by single-crystal X-ray diffraction technique, elemental analysis, molar conductance, FT-IR, UV-Vis, IH-NMR spectra and thermogravimetrie analysis. The Schiff base ligand and its zinc(Ⅱ) complexes have been tested in vitro to evaluate their antibacterial activity against bacteria, viz., Escherichia Coli, Staphylococcus aureus and Bacillus Subtilis. The results show that these complexes have higher activity than the corresponding free Schiff base ligand against the same bacteria.展开更多
A novel mixed-ligand coordination polymer [Zn(BTA)(ip)0.5]n(1, HBTA = benzotriazole, H2 ip = isophthalic acid) has been synthesized under hydrothermal conditions, which was further characterized by X-ray diffraction, ...A novel mixed-ligand coordination polymer [Zn(BTA)(ip)0.5]n(1, HBTA = benzotriazole, H2 ip = isophthalic acid) has been synthesized under hydrothermal conditions, which was further characterized by X-ray diffraction, IR spectrum, elemental analysis and TG-DTA experiments. Complex 1 crystallizes in monoclinic system, space group Pnma with a = 8.9731(5), b = 22.0477(12), c = 10.0217(5) ?, V = 1982.66(18) ?3, Z = 8, C10 H6 ZnN3 O2, Mr = 265.55, Dc = 1.779 g/cm3, μ = 2.462 mm-1, F(000) = 1064, the final R = 0.0225 and wR = 0.0652 with I > 2σ(I). This complex is a 3 D framework with the(42,62,82)(4,62,83) topology. Furthermore, the thermal stability of complex 1 is observed to be dependent on the polymeric structure nature. Strong solid-state luminescence emissions suggest that complex 1 is a good candidate for light emission materials.展开更多
The title complex, Zn(C24H13NO)2Cl21, has been synthesized by the reaction of zinc chloride with Schiff base ligand N-salicylidene-p-toluidine and its structure was determined by single-crystal X-ray diffraction. Th...The title complex, Zn(C24H13NO)2Cl21, has been synthesized by the reaction of zinc chloride with Schiff base ligand N-salicylidene-p-toluidine and its structure was determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group Cc with a = 14.896(3), b = 12.506(2), c = 15.352(3) A,β = 114.711 (4)°, V = 2598.0(8) A^3, C28H26ZnCl2N2O2, Mr = 558.80, Z = 4, Dc = 1 .429 g/cm^3,μ = 1.179 mm^-1, Flack parameter = 0.027(19), F(000) = 1152, R = 0.0709 and wR = 0.1041 for 3117 observed reflections (Ⅰ 〉 2σ(Ⅰ)). In complex 1, the center Zn ion is four-coordinated by two O atoms from two Schiff base ligands and two Cl atoms in a distorted tetrahedral geometry. Additionally, the thermal decomposition of complex 1 as well as its kinetic mechanisms and equations is studied under the non-isothermal integral and differential methods in air by TG-DTG curves.展开更多
A binuclear zinc(Ⅱ) complex with 2-carboxycinnamic acid (2-ccm) and dipyrido- [3,2-a:2',3'-c]phenazine (DPPZ), {[Zn2(2-ccm)2(DPPZ)2]·2H2O}n, was synthesized and characterized by elemental analysis, ...A binuclear zinc(Ⅱ) complex with 2-carboxycinnamic acid (2-ccm) and dipyrido- [3,2-a:2',3'-c]phenazine (DPPZ), {[Zn2(2-ccm)2(DPPZ)2]·2H2O}n, was synthesized and characterized by elemental analysis, IR, single-crystal X-ray diffraction, thermal gravimetry and fluo- rescent emission. It crystallizes in monoclinic, space group P21/c with a = 13.409(4), b = 25.530(7), c = 13.952(4) A, β = 99.554(3)°, V= 4710(2) A3, Z= 4, C56H36N8O10Zn2, Mr= 1111.67, Dc = 1.568 g/cm3, μ(MoKα) = 1.093 mm^-1, F(000) = 2272, R = 0.0422 and wR = 0.0895. In the crystal, the basic unit of 1 is a binuclear Zn2 entity which is linked by 2-ccm ligand to form a 1D double chain along the a axis. The O-H...O hydrogen bonding and π-π interactions lead to a 3D supramolecular motif. In addition, thermal and luminescent properties of complex 1 have also been investigated.展开更多
A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diff...A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental,and photoluminescent analysis.Complex 1 crystallizes in triclinic system,space group P1 with a = 9.3040(19),b = 10.694(2),c =16.841(3) A°,α = 101.18(3),β = 105.77(3),γ = 91.72(3)°,V= 1575.8(5) A°3,C(32)H(22)Zn2Cl3N7O2,Mr =773.66,Dc = 1.631 g/cm^3,Z = 2,F(000) = 780,μ = 1.820 mm^-1,the final R = 0.1238 and wR =0.1131.X-ray diffraction analyses indicate that 1 displays two crystallographic independent Zn^Ⅱmetal centers with a distorted tetragonal pyramidal(ZnN4O) and a tetrahedral(ZnNCl3) geometries,respectively.The phen serves as a common N,N'-bidentate ligand,and the bta^- as a unique N,O-bridged ligand in 1.In the crystal,1 forms a stable 3D supramolecular architecture by trifurcated hydrogen bonding C-H…C1 interactions and C-H…π,π…π stacking.1 showed photo-electric conversion properties.展开更多
Four new heterotrinuclear complexes have been synthesized and characterized, namely [(CoL 2) 2Cu(pbaOH)](ClO 4) 2, where pbaOH denotes 2 hydroxy 1,3 propylenebis(oxamato) and L stands for 1,10 phenanthroline(p...Four new heterotrinuclear complexes have been synthesized and characterized, namely [(CoL 2) 2Cu(pbaOH)](ClO 4) 2, where pbaOH denotes 2 hydroxy 1,3 propylenebis(oxamato) and L stands for 1,10 phenanthroline(phen), 5 nitro 1,10 phenanthroline(NO 2 phen), 2,2 bipyridyl(bpy) and 4,4 dimethyl 2,2 bipyridyl(Me 2bpy). The temperature dependence of the magnetic susceptibility of [(Cophen 2) 2Cu(pbaOH)](ClO 4) 2·H 2O has been studied in the range of 4—300 K, the plot of χ M T vs. T exhibits a minimum at about 120 K, but abnormal magnetic behavior below 78 K.展开更多
The title compound, trans-bis(acesulfamato-O)tetraaquazinc(Ⅱ) (I, C8H16N2O12S2Zn), crystallizes in the triclinic system, space group P1 with a = 5.1638(5), b = 8.5338(9), c = 9.9583(9)A, α = 74.325(8),...The title compound, trans-bis(acesulfamato-O)tetraaquazinc(Ⅱ) (I, C8H16N2O12S2Zn), crystallizes in the triclinic system, space group P1 with a = 5.1638(5), b = 8.5338(9), c = 9.9583(9)A, α = 74.325(8), β = 81.112(7), γ = 75.800(8)°, V= 407.77(7) A3, Z = 1, F(000) = 236, Rint = 0.085, T= 296 K, the final R = 0.029 and wR = 0.078 for 1832 observed reflections with I〉 2σ(0. The ZnⅡcentre resides on a centre of symmetry and has a distorted octahedral geometry. The basal plane is defined by two carbonyl O atoms of two monodentate trans-oriented acesulfamato ligands and two trans-aqua ligands. The axial positions in the octahedron are occupied by two trans-aqua ligands. Intermolecular O-H…O hydrogen bonds produce R22(8) and R22(16) rings, which lead to two- dimensional polymeric chains.展开更多
基金Supported by the Construct Program of the Key Discipline in Hunan Province and Key Project of Production Plan of Hengyang City(2013)
文摘A new trinuclear zinc complex Zns(2,2"-bipy)2(3,5-DMBA)6"(H20)1.5 (1) with 3,5-dimethylbenzoic acid (3,5-DMBA) and 2,2"-bipyridine as ligands has been synthesized in the mixed solvents of methanol and water. It crystallizes in the monoclinic space group C2/c with a = 31.1497(15), b = 11.7576(6), c = 20.9049(10) A, fl = 118.4550(10)°, V- 6731.4(6) A3, Dc = 1.412 g/cm3, Z = 4, F(000) = 2972, GOOF = 1.069, the final R= 0.0667 and wR= 0.1917. The whole molecule consists of three zinc ions, six 3,5-DMBA molecules, two 2,2"-bipyridine molecules and one and half water molecules, in which three zinc ions are bridged by six μ2-η1:η0 carboxylate groups of 3,5-DMBA. The Zn(1) atom is centrosymmetric, and adopts a distorted octahedral ZnO6 geometry, while the Zn(2) gives a distorted square pyramidal ZnOsN2 geometry. The spectroscopic characterization and thermal stability properties of the complex were investigated.
基金supported by the NNSFC (20971085)the Key Project and the Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry
文摘A homochiral complex, Zn3(Hsalen)2(Py)4(H2O)2 (salen = (1R,2R)-(-)-diamino-cyclohexane-N,N'-biscarboxyl-salicylidene) 1, has been synthesized by solvothermal procedure and characterized by IR, microanalysis, TGA, powder and single-crystal X-ray crystallography. It crystallizes in monoclinic space group P2 with a = 10.9439(7), b = 10.1722(6), c = 27.3450(17), β = 97.5060(10)o, V = 3018.1(3) 3, Z = 2, Zn3(Hsalen)2(Py)4(H2O)2, Mr = 1363.33, Dc = 1.500 g/cm3, F(000) = 1408, μ = 1.257 mm-1, GOOF = 1.042, the final R = 0.0601 and wR = 0.1464 for 10322 observed reflections with I 2σ(I). The coordination polymer 1 possesses a 1D infinite zigzag chain architecture constructed by strong hydrogen bonding interactions and the polymeric chains are further assembled into a 2D supramolecular network structure via C–H···π interactions between the cyclohexane and aromatic rings of the ligand of adjacent chains. Simultaneously, π···π stacking interactions play an important role in forming the 2D supramolecular framework.
基金Supported by the Natural Science Foundation of Hunan Province(No.11JJ9006)Key Project of Science and Technology Plan of Hunan Province(2012FJ2002)the Construct Program of the Key Discipline in Hunan Province
文摘A new complex has been synthesized with o-methylbenzoyl-benzoic acid(HL) and 1,10-phenanthroline(phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b = 17.7876(18), c = 19.998(2), β = 104.720(4)o, C54H48N4O11Zn, Mr = 994.33, V = 4690.2(9)3, Dc = 1.408 g/cm3, Z = 4, F(000) = 2072, μ(MoKα) = 0.59 mm-1, R = 0.0736 and wR = 0.2029. The crystal structure shows that the zinc ions are coordinated with two oxygen atoms from two HL molecules and four nitrogen atoms from two phen molecules, forming distorted octahedral coordination geometry. The fluorescent and thermal stability properties of the complex are studied. The result shows that it has one fluorescent emission band at around 412 nm. In addition, the complex is stable under 210 ℃.
基金supported by the Project for Undergraduate Research Study and Innovative Experiment of Hunan Provincial(2013-191)National Undergraduate Training Programs for Innovation and Entrepreneurship(201310551158)+4 种基金the Scientific Research Fund of Hunan Provincial Education Department(13B029,13A030)the Key Laboratory of Functional Organometallic Materials of Hunan Province College(13K09,13K10)the Program for Excellent Talents in Hunan University of Science and Engineeringthe Construct Program of the Key Discipline in Hunan Province(2011-76)the Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province(2012-318)
文摘Two macrocyclic zinc(Ⅱ) complexes {[ZnL(VO3)2]·0.33H2O}n(1) and [ZnL(H2O)2][Ni(CN)4](2)(L = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) have been obtained from the reactions of [ZnL](ClO4)2 with NH4VO3 and K2[Ni(CN)4], respectively, and structurally characterized by elemental analysis, IR, XRPD, TG and X-ray diffraction. Single-crystal X-ray diffraction analyses indicated that the Zn(Ⅱ) atom lies on an inversion center and is octahedrally coordinated by four nitrogen atoms of the tetradentate macrocyclic ligand in the equatorial plane and two oxygen atoms of [VO4] tetrahedra in the axial positions in 1, and two oxygen atoms of two water molecules in 2. Complex 1 shows a three-dimensional structure, which is constructed by the links of [VO3]nn- chains with [ZnL]2+, forming one-dimensional channels occupied by guest water molecules. The monomers of [ZnL(H2O)2]2+ and [Ni(CN)4]2- are connected through the intermolecular hydrogen bonds to form a two-dimensional sheet in complex 2.
基金Supported by the Scientific and Technological Program of Hunan Provincial Department of Science and Technology (No. 2010JT4041)Hunan Provincial Department of Education (No. 11C0186)Hunan Provincial Key Discipline Construction and Hunan College Key Laboratory of Functional Organometallic Materials
文摘The novel complex [Zn2(Mba)3(Phen)2EtOH)]·ClO4 (Hrnba = methoxybenzoic acid, Phen = 1,10-phenanthroline, EtOH = ethanol) was synthesized by hydrothermal reactions, and its structure was determined by X-ray diffraction. The crystal belongs to the triclinic system, space group Pi with a = 1.15362(1), b = 1.3655(3), c = 1.61451(1) nm, α= 72.842(2), β = 83.259(3), y = 72.083(2)°, V = 2.3112(6) nm3, Z = 2,μ(MoKa) = 11.71 cm-1, F(000) = 1120, R = 0.0552 and wR = 0.1157 (I 〉 2σ(I)). The two centric zinc(H) ions in the complex locate in a distorted octahedral coordination geometry and a distorted trigonal bipyramid coordination geometry, respectively. Two bridging bidentate carboxyl groups and a μ2-O carboxyl group from three methoxybenzoic acids act as the bridge to link two Zn(Ⅱ) ions. The asymmetric units are connected by π-π packing interactions between aromatic rings to form a three-dimensional supramolecular network. The experimental results show a good fluorescence property for the complex.
基金Supported by the National Natural Science Foundation of China(No.51474086)Natural Science Foundation-Steel and Iron Foundation of Hebei Province(B2015209299)Undergraduate Innovation Programs of North China University of Science and Technology(No.X2015004)
文摘Two zinc(II) complexes, namely, [Zn(L1)Cl2]2 (1) and {[Zn(L2)(tbta)]·3H2O}n (2) (L1 = 1,3-bis(2-methylbenzimidazol-1-ylmethyl)benzene, H2tbta = tetrabromoterephthalic acid, L2 = 1,3-bis(2-methylbenzimidazol-1-yl)-2-propanol) have been successfully obtained under hydrothermal conditions. Complex 1 displays binuclear structure which is further extended into a 1D supramolecular chain through π–π stacking. Complex 2 features 2D (4,4) network based on L2/tbta2– double linker. The thermal stability, fluorescence properties and catalytic activities of two complexes for degradation of Methyl orange in a Fenton-like process were discussed.
基金Supported by the National Science Foundation of China(No.21161019,21301146)Natural Science Fund for Distinguished Young Scholars of Xinjiang Uygur Autonomous(No.2013711008)Technological Innovation Youth Training Project of Xinjiang Autonomous(No.2013721017)
文摘[Zn(L)(CH3OH)3](H2L = N-(1-phenyl-3-methyl-4-propenylidene-5-pyrazolone)-salicylidene hydrazide) has been synthesized by the reaction of zinc nitrate and ligand H2 L. The complex crystallizes in orthorhombic system, space group Pbca with a = 5.888(15), b = 14.564(14), c = 22.20(2) , V = 5137(8) 3, Z = 8 and F(000) = 2184. The ligand serves as a negative bivalent tridentate chelating agent to coordinate with the central zinc(II) atom. DNA-binding was studied by UV-Vis spectral analysis and ethidium bromide(EB) displacement experiments. The results showed that the DNA-binding constant of the complex is 5.1×104 M–1. Antitumor activity of [Zn(L)(CH3OH)3] and the ligand have been investigated by MTT assay, which indicated that the complex has better cytotoxicity to Eca-109 and He La than free ligand.
基金Supported by the Jilin Province Science and Technology Development Plan Item(No.20140204080GX)the Project of the Education Department of Jilin Province,China(No.JJKH20180777KJ)the Science and Technology Development Projects of Siping City(No.2017057)
文摘The structure of a zinc(Ⅱ) coordination complex(1), [C14 H10 N3 O5 Zn1.5]n or [Zn1.5(bzim)(pydc)(H2 O)]n(H2 pydc = pyridine-2,3-dicarboxylic acid, Hbzim = benzimidazole), has been determined by X-ray crystallography and characterized by elemental analysis, IR spectrum and luminescence. Chemical formula: C14 H10 N3 O5 Zn1.5. It crystallizes in the monoclinic system, space group P21/c with a = 12.303(4), b = 12.052(4), c = 10.212(3) ?, β = 104.147(4), V = 1468.3(8) ?3, Z = 4, Mr = 398.30, Dc = 1.802 g/cm3, F(000) = 800, μ = 2.501 mm-1 and S = 1.000. The 2-D network architecture of 1 is constructed from benzimidazole, zinc and pyridine-2,3-dicarboxylic acid. The quantum-chemical calculations have been performed on ‘molecular fragments’ extracted from the crystal structure using the B3 LYP method in Gaussian 09. The luminescence spectrum shows that complex 1 emits blue luminescence.
基金Supported by the National Natural Science Foundation of China(No.21576112)the Program for New Century Excellent Talents in University(NCET-10-0176)of ChinaNatural Science Foundation Project of Jilin Province(No.20130521019JH and 201215219)
文摘A novel polymeric zinc(II) complex {[Zn2(TIA)(H2O)3]·(NO3)}n(1, H3TIA = 5-(1H-tetrazol-5-yl)isophthalic acid) has been synthesized in mixed solvents under solvothermal conditions and characterized by elemental analysis, IR spectroscopy and X-ray single-crystal diffraction. Complex 1 crystallizes in orthorhombic, space group Cmcm with a = 10.4210(6), b =23.3526(14), c = 6.9214(4)A, V = 1684.37(17)A^3, Z = 4, C9H4N5O(10)Zn2, Mr = 472.91, Dc = 1.865g/cm^3, F(000) = 932, λ(MoK α) = 2.909 mm^-1, R = 0.0423 and wR = 0.1287. The complex has good thermal stability and excellent photoluminescent property.
文摘The title complex, mercury bridged biferrocene trinuclear complex Hg(FcL)2. Bis (S-methyl-N- (1-ferrocenyl-1-methyl) methylenedithiocarbazate) mercury,Crystallizes in space group Pbca with a =19. 510 (4), b=19. 921 (5), c=15. 581 (3)A. V=6095(3) A, Z=8,M.=863. 12, Dc=1.881 g/cm3; u=19. 24 cm-1 and F(000) = 3376. The final refinement of 2455 observed reflections is converged with R= 0. 043 and Rw=0.047. X-ray crystal structure analysis revealed that the coordinationgeometry of Hg atom is a distorted tetrahedron with two Hg-N bonds and two Hg- S bonds. The Schiff-base ligand loses a proton from its tautomeric thiol form and is cryordianted to the Hg aotm uia the mercapto sulphur and the β-nitrogen atoms.
基金Natural Science Foundation and Education Department Foundation of Guangxi Province
文摘The title zinc(Ⅱ) complex salt [Zn(H2O)6](ClO4)2-(PNOS)4, where PNOS is derived from picolinaldehyde N-oxide with semicarbazone, has been prepared and structurally characterized by X-ray single-crystal analysis. It crystallizes in triclinic, space group PI with a = 7.529(3), b = 10.206(4), c = 14.678(6)A, a = 86.293(6), β= 87.686(7), γ= 81.382(6)°, C28H44Cl2N16O22Zn, Mr = 1093.06, V = 1112.3(8) ,A^3 Z = 1, Dc = 1.632 g/cm^3, S = 1.089, μ(MoKa) = 0.773 mm^-1, F(000) = 564, the final R = 0.0438 and wR = 0.1076 for 3888 independent reflections with Rint = 0.0224. The crystal structure possesses a [Zn(H2O)6]^2+ cation, two ClO4^- anions and four PNOSs. In the crystal structure, Zn^2+ cation is located at the symcenter and coordinated by six water molecules. In [Zn(H2O)6]^2+, an elongate octahedral complex cation, the average Zn-O bond length is 2.087(2) A. There exist a lot of H bonds in the structure, linking the cation [Zn(H2O)6]^2+, anion ClO4^- and PNOS to form a 3D network.
文摘Two new zinc(Ⅱ) complexes, [Zn2L2Ch].2[ZnL(CH3OH)Cl2] 1 and [ZnL2(NO3)2] 2, were synthesized by reacting ZnX2.nH2O (X = Cl^-, NO3^-) and a Schiff base ligand 2-[(4-methylphenylimino)methyl]-6-methoxyphenol (C15HIsNO2, L) which was obtained by the condensation of o-vanillin (2-hydroxy-3-methoxybenzaldehyde) with p-toluidine. Both 1 and 2 were characterized by single-crystal X-ray diffraction technique, elemental analysis, molar conductance, FT-IR, UV-Vis, IH-NMR spectra and thermogravimetrie analysis. The Schiff base ligand and its zinc(Ⅱ) complexes have been tested in vitro to evaluate their antibacterial activity against bacteria, viz., Escherichia Coli, Staphylococcus aureus and Bacillus Subtilis. The results show that these complexes have higher activity than the corresponding free Schiff base ligand against the same bacteria.
基金supported by the Tianjin Training Programs of Innovation and Entrepreneurship for Undergraduates(No.201810065047)
文摘A novel mixed-ligand coordination polymer [Zn(BTA)(ip)0.5]n(1, HBTA = benzotriazole, H2 ip = isophthalic acid) has been synthesized under hydrothermal conditions, which was further characterized by X-ray diffraction, IR spectrum, elemental analysis and TG-DTA experiments. Complex 1 crystallizes in monoclinic system, space group Pnma with a = 8.9731(5), b = 22.0477(12), c = 10.0217(5) ?, V = 1982.66(18) ?3, Z = 8, C10 H6 ZnN3 O2, Mr = 265.55, Dc = 1.779 g/cm3, μ = 2.462 mm-1, F(000) = 1064, the final R = 0.0225 and wR = 0.0652 with I > 2σ(I). This complex is a 3 D framework with the(42,62,82)(4,62,83) topology. Furthermore, the thermal stability of complex 1 is observed to be dependent on the polymeric structure nature. Strong solid-state luminescence emissions suggest that complex 1 is a good candidate for light emission materials.
文摘The title complex, Zn(C24H13NO)2Cl21, has been synthesized by the reaction of zinc chloride with Schiff base ligand N-salicylidene-p-toluidine and its structure was determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group Cc with a = 14.896(3), b = 12.506(2), c = 15.352(3) A,β = 114.711 (4)°, V = 2598.0(8) A^3, C28H26ZnCl2N2O2, Mr = 558.80, Z = 4, Dc = 1 .429 g/cm^3,μ = 1.179 mm^-1, Flack parameter = 0.027(19), F(000) = 1152, R = 0.0709 and wR = 0.1041 for 3117 observed reflections (Ⅰ 〉 2σ(Ⅰ)). In complex 1, the center Zn ion is four-coordinated by two O atoms from two Schiff base ligands and two Cl atoms in a distorted tetrahedral geometry. Additionally, the thermal decomposition of complex 1 as well as its kinetic mechanisms and equations is studied under the non-isothermal integral and differential methods in air by TG-DTG curves.
基金Supported by the Doctoral Foundation of Jilin Normal University (Nos.2006006 and 2007009)Graduate Students' Innovation Foundation of Jilin Normal University (No.2006066)
文摘A binuclear zinc(Ⅱ) complex with 2-carboxycinnamic acid (2-ccm) and dipyrido- [3,2-a:2',3'-c]phenazine (DPPZ), {[Zn2(2-ccm)2(DPPZ)2]·2H2O}n, was synthesized and characterized by elemental analysis, IR, single-crystal X-ray diffraction, thermal gravimetry and fluo- rescent emission. It crystallizes in monoclinic, space group P21/c with a = 13.409(4), b = 25.530(7), c = 13.952(4) A, β = 99.554(3)°, V= 4710(2) A3, Z= 4, C56H36N8O10Zn2, Mr= 1111.67, Dc = 1.568 g/cm3, μ(MoKα) = 1.093 mm^-1, F(000) = 2272, R = 0.0422 and wR = 0.0895. In the crystal, the basic unit of 1 is a binuclear Zn2 entity which is linked by 2-ccm ligand to form a 1D double chain along the a axis. The O-H...O hydrogen bonding and π-π interactions lead to a 3D supramolecular motif. In addition, thermal and luminescent properties of complex 1 have also been investigated.
基金supported by Guangxi Provincial Department of Education(No.KY2015ZD130)the Natural Science Foundation of Guangxi Province(No.2013GXNSFBA019030)the financial support from the Natural Science Foundation of Qinzhou University(No.2014PY-GJ05)
文摘A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental,and photoluminescent analysis.Complex 1 crystallizes in triclinic system,space group P1 with a = 9.3040(19),b = 10.694(2),c =16.841(3) A°,α = 101.18(3),β = 105.77(3),γ = 91.72(3)°,V= 1575.8(5) A°3,C(32)H(22)Zn2Cl3N7O2,Mr =773.66,Dc = 1.631 g/cm^3,Z = 2,F(000) = 780,μ = 1.820 mm^-1,the final R = 0.1238 and wR =0.1131.X-ray diffraction analyses indicate that 1 displays two crystallographic independent Zn^Ⅱmetal centers with a distorted tetragonal pyramidal(ZnN4O) and a tetrahedral(ZnNCl3) geometries,respectively.The phen serves as a common N,N'-bidentate ligand,and the bta^- as a unique N,O-bridged ligand in 1.In the crystal,1 forms a stable 3D supramolecular architecture by trifurcated hydrogen bonding C-H…C1 interactions and C-H…π,π…π stacking.1 showed photo-electric conversion properties.
文摘Four new heterotrinuclear complexes have been synthesized and characterized, namely [(CoL 2) 2Cu(pbaOH)](ClO 4) 2, where pbaOH denotes 2 hydroxy 1,3 propylenebis(oxamato) and L stands for 1,10 phenanthroline(phen), 5 nitro 1,10 phenanthroline(NO 2 phen), 2,2 bipyridyl(bpy) and 4,4 dimethyl 2,2 bipyridyl(Me 2bpy). The temperature dependence of the magnetic susceptibility of [(Cophen 2) 2Cu(pbaOH)](ClO 4) 2·H 2O has been studied in the range of 4—300 K, the plot of χ M T vs. T exhibits a minimum at about 120 K, but abnormal magnetic behavior below 78 K.
基金the Faculty of Arts and Sciences,Ondokuz Mayis University,Turkey,for the use of the Stoe IPDSⅡdiffractometer (purchased under grant No.F279 of the University Research Fund)
文摘The title compound, trans-bis(acesulfamato-O)tetraaquazinc(Ⅱ) (I, C8H16N2O12S2Zn), crystallizes in the triclinic system, space group P1 with a = 5.1638(5), b = 8.5338(9), c = 9.9583(9)A, α = 74.325(8), β = 81.112(7), γ = 75.800(8)°, V= 407.77(7) A3, Z = 1, F(000) = 236, Rint = 0.085, T= 296 K, the final R = 0.029 and wR = 0.078 for 1832 observed reflections with I〉 2σ(0. The ZnⅡcentre resides on a centre of symmetry and has a distorted octahedral geometry. The basal plane is defined by two carbonyl O atoms of two monodentate trans-oriented acesulfamato ligands and two trans-aqua ligands. The axial positions in the octahedron are occupied by two trans-aqua ligands. Intermolecular O-H…O hydrogen bonds produce R22(8) and R22(16) rings, which lead to two- dimensional polymeric chains.