New chiral C_2-symmetrical bis(oxazoline) compounds bearing one isobutyl-, secbutyl-, benzyl- or isopropyl-substituent at the 4-position have been prepared and characterized.
The synthesis of bis(oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis(oxazoline) dicarboxylate derivati...The synthesis of bis(oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis(oxazoline) dicarboxylate derivatives, which can not be obtained by the general method using MsCl and Et3N as dehydrating cyclization reagent.展开更多
The mass spectrometric fragmentation of 1,8-bis [ 4-substituted (oxazolin-2-yl) ] anthracenes (AnBOXes) was investigated by using mass-analyzed ion kinetic energy spectrometry under electron-impact ionization cond...The mass spectrometric fragmentation of 1,8-bis [ 4-substituted (oxazolin-2-yl) ] anthracenes (AnBOXes) was investigated by using mass-analyzed ion kinetic energy spectrometry under electron-impact ionization conditions. All the compounds could undergo a ring contraction by the loss of an RCH = CH2 molecule to form 1-oxazirinyl-8-(oxazolin- 2-yl) anthracene ions, which could further lose an R radical, followed by the loss of oxazoline. These ions could also eliminate an R radical and subsequently undergo ring-contraction rearrangements to lose a CHCH2O fragraent and an epoxide molecule, respectively. The ions that are formed could further lose CHCH2O and CH2 = CH fragments. Several ring-contraction rearrangements of the oxazoline ring were observed under electron-impact ionization conditions.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
Six lanthanide complexes with bis(phenylsulfinyl)ethane(bphse) and organic bases(phen: 1,10 phenanthroline and bipy: 2,2'-bipyridine) were synthesized and characterized by elemental analysis, conductance and spec...Six lanthanide complexes with bis(phenylsulfinyl)ethane(bphse) and organic bases(phen: 1,10 phenanthroline and bipy: 2,2'-bipyridine) were synthesized and characterized by elemental analysis, conductance and spectral (IR, UV Visible) data. The complexes were Ln(bphse) 2(bipy)(ClO 4) 3· n H 2O and Ln 2(bphse) 3(phen) 2(ClO 4) 6·H 2O(where Ln=Nd, Eu and Gd; n =0~2). IR spectral data confirmed that the lanthanide ions were coordinated by oxygen atoms from bphse and nitrogen atoms from phen or bipy. Exitation and emission spectra of Eu complexes were measured and discussed.展开更多
(C5H5)3Ln(THF)reacted with amine bis(phenol) LH2 [ L = Me2NCH2CH2N {CH2-(2-O-C6H2-But^1-3-Me- 5)}2 ] in a 1:1 molar ratio in THF to generate the amine bis(phenolato) cyclopentadienyl lanthanide complexes LL...(C5H5)3Ln(THF)reacted with amine bis(phenol) LH2 [ L = Me2NCH2CH2N {CH2-(2-O-C6H2-But^1-3-Me- 5)}2 ] in a 1:1 molar ratio in THF to generate the amine bis(phenolato) cyclopentadienyl lanthanide complexes LLn(C5H5) (THF)·(THF),(Ln = La (1), n =0; Ln = Sm(2), n = 1) in high yields. Complexes 1 and 2 were fully characterized by elemental analysis, NMR (for 1) and IR spectra, and X-ray structural determination. The crystal data of complex 1 are monoclinic, P21/c space goup, a= 1.1595(1) nm, b = 1.8588(2) nm, c = 1.6647(1) nm, β = 98.490(2)°, V =3.5486(5) nm^3, Z =4, Dc = 1.338 mg· m^3,μ = 1240 mm^-1, F(000)= 1488, R =0.0249, wR = 0.0568. The crystal data of complex 2 are monoclinic, P21/c sp ace goup, a = 0.9692 (1) nm, b = 1.4583 (2) nm, c = 2.8192 (3) nm, = 96.805 (2)°, V = 3.9584 (7) nm^3, Z=4, Dc =1.340 mg · ma, μ = 1.524 mm^-1, F(000)= 1668, R =0.0346, wR =0.0756. The attempts failed to synthesize the amine bis(phenolate) lanthanide alkoxides by the reactions of complexes 1 and 2 with alcohols. The preliminary results revealed that complex 1 can initiate ε-caprolactone polymerization.展开更多
A novel brideed bis(β-cvclodextrin), 4, 4'-diaminodiphenyl ether-bfiged-bis (6-aimino-6-deoxv-β-cyclodextrin) 3, has been synthesized and its inclusion complexation behavior with three linear'guest dyes (AR, ...A novel brideed bis(β-cvclodextrin), 4, 4'-diaminodiphenyl ether-bfiged-bis (6-aimino-6-deoxv-β-cyclodextrin) 3, has been synthesized and its inclusion complexation behavior with three linear'guest dyes (AR, NR and MB ) has been investigated by. means of fluorescence spectrometry. The-result obtained demonstrated that the novel bridged bis(β-cyclodextnn) showed much higher affinities towards guest dyes than native β-cyclodextrin.展开更多
1, 1'--Bis(benzylseleno)ferrocene and its platinum complex were synthesized. It was found that the platinum complex was efficient catalyst for the hydrosilylation of olefins with triethoxysilane.
Two new three-dimensional supramolecular complexes, namely, [Cd(cba)2(bib)]n(1) and [Zn(cba)2(bib)]2 n(2)(Hcba = 2-chlorinebenzoic acid, bib = 1,4-bis(imidazol-1-yl)-butane)were hydrothermally designed and synthesized...Two new three-dimensional supramolecular complexes, namely, [Cd(cba)2(bib)]n(1) and [Zn(cba)2(bib)]2 n(2)(Hcba = 2-chlorinebenzoic acid, bib = 1,4-bis(imidazol-1-yl)-butane)were hydrothermally designed and synthesized. Their structures were determined by elemental analyses, IR spectroscopy, TG, fluorescence spectroscopy, single-crystal and powder X-ray diffraction. Complex 1 exhibits a one-dimensional zigzag chain and complex 2 shows a zero-dimensional structure, which were further extended into three-dimensional supramolecular structures through hydrogen bonds and π-π stacking interactions.展开更多
The reactions of 5,5'-bis(2-acylphenyl)diazo-dipyrromethane (H2L) with CuSO4 and NiCl2 resulted in the formation of corresponding mononuclear coordination complexes 2 (CuL) and 3 (NIL). The crystal of complex...The reactions of 5,5'-bis(2-acylphenyl)diazo-dipyrromethane (H2L) with CuSO4 and NiCl2 resulted in the formation of corresponding mononuclear coordination complexes 2 (CuL) and 3 (NIL). The crystal of complex 2 is of monoclinic system, space group P21 with a = 10.040(5), b = 11.900(5), c = 11.170(5) A, β = 93.057(8)°, V = 1332.8(2) A3, Z = 2, C29H28N602Cu, Mr = 556.11, Dc = 1.386 g/cm, F(000) = 578 and/z(MoKa) = 0.857 mm^-1. The crystal of complex 3 belongs to the monoclinic system, space group P21/n with a = 12.0445(6), b = 17.2101(8), c = 16.3304(6) A, β = 128.407(2)°, V = 2654.6(2) A3, Z = 4, C29H28N6O2Ni, Mr= 551.28, Dc= 1.380 g/cm, F(000) = 1152 and μ(MoKa) = 0.770 mm^-1. In both complexes, the metal ions are in square-planar geometry by coordinating to two azo N atoms and two deprotonated pyrrole N atoms. Intramolecular Cu…O=C in complex 2 and intermolecular Ni…O=C in complex 3 were found. The UV-Vis spectra and thermal stability of complexes 2 and 3 were also studied.展开更多
Lanthanide perchlorate complexes with meso-bis(phenylsulfinyl)ethane(meso-BPhSE)of type[LnL3-ClO4](ClO4)2,where Ln=La~Nd,Sin,Gd~Ho,Tm~Lu,have been prepared and characterized by elementalanalysis,electrical co...Lanthanide perchlorate complexes with meso-bis(phenylsulfinyl)ethane(meso-BPhSE)of type[LnL3-ClO4](ClO4)2,where Ln=La~Nd,Sin,Gd~Ho,Tm~Lu,have been prepared and characterized by elementalanalysis,electrical conductance,infrared and electronic spectra,magnetic moment measurement and thermalanalysis.Meso-BPhSE acts as a neutral ligand which combines with lanthanide ion through oxygen atom ofdisulfoxide moieties.In all complexes,except that of Ho,meso-BPhSE does not behave as a complete bidentatechelate but does coordinate,at least partially,as a monodentate ligand.For the Ha complex all meso-BPhSEacts as bidentate ones.展开更多
A series of new NIR dyes bearing 4-(4-morpholinyl) phenyl and substituted phenyl, were synthesized. The maximum absorption wavelengths of these dyes range from 928 nm to 990 nm.
A complex [Cd2Na2(BOABA)2(H2O)8]·H2O(1) was synthesized by using 2,4-bisoxyacetate-benzoic acid(H3BOABA) and Cd(OH)2. It was characterized by elemental analysis, IR spectra, and single-crystal X-ray dif...A complex [Cd2Na2(BOABA)2(H2O)8]·H2O(1) was synthesized by using 2,4-bisoxyacetate-benzoic acid(H3BOABA) and Cd(OH)2. It was characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. Complex 1 shows a two-dimensional 3-connected rigid plane. The interactions between the ligand and its complex with DNA were studied by Et Br fluorescence probe. Photoluminescent studies indicate that the complex may be excellent candidates for potential photoactive materials.展开更多
A novel nickel(II)-complex Ni[L]Cl2-CH3CN(1) containing the tridentate ligand 2,6-bis[1-(2,4,6- trimethylphenylimino)ethyl]pyridine(L) has been synthesized. The crystal structure of complex 1 was determined by...A novel nickel(II)-complex Ni[L]Cl2-CH3CN(1) containing the tridentate ligand 2,6-bis[1-(2,4,6- trimethylphenylimino)ethyl]pyridine(L) has been synthesized. The crystal structure of complex 1 was determined by single crystal X-ray diffraction analysis. The catalytic activity of complex 1 for the polymerization of ethylene was studied under activation with methylaluminoxane(MAO).展开更多
Complexes [MCl 2{CH 3N(CH 2CH 2N[CDS1]CR 1R 2) 2}]((3, M=Co, R 1=H, R 2=Ph ; 4, M=Fe, R 1=H, \{R 2=Ph\}; 5, M=Co, R 1=R 2=Ph) were prepared and characterized by IR spectra and elemental analysis. The combination of ea...Complexes [MCl 2{CH 3N(CH 2CH 2N[CDS1]CR 1R 2) 2}]((3, M=Co, R 1=H, R 2=Ph ; 4, M=Fe, R 1=H, \{R 2=Ph\}; 5, M=Co, R 1=R 2=Ph) were prepared and characterized by IR spectra and elemental analysis. The combination of each of complexes 3-5 with ethylaluminoxane(EAO), respectively, was found to be moderately active for ethylene oligomerization to low carbon olefins. The activity of 113 kg oligomers·mol -1 Co·h -1 for complex 3(100 mol of EAO, 180 ℃ and 1 8 MPa ethylene) was observed with a selectivity of 93% to C 4-10 olefins, of which 96% were linear C4 10 olefins. The catalytic properties of complexes 3-5 were compared with those of analogous P,P coordinated complexes [MCl 2{CH 3N(CH 2CH 2PPh 2) 2}](1, M=Co; 2, \{M=\}Fe).展开更多
Dinuclear Cu(Ⅱ) complexes (Cu,LCl4). 2H2O and Cu2L'Cl4 are pre-pared and characterized by X-ray structure analysis. (Cu2I-Cl4). 2H2O, C20 H40N6Cu2Cl4O2, Mr=665. 54, monoclinic, 6 for 188l observed reflections wit...Dinuclear Cu(Ⅱ) complexes (Cu,LCl4). 2H2O and Cu2L'Cl4 are pre-pared and characterized by X-ray structure analysis. (Cu2I-Cl4). 2H2O, C20 H40N6Cu2Cl4O2, Mr=665. 54, monoclinic, 6 for 188l observed reflections with I>3(I). Cu2L'Cl4, C20H36N6Cu2Cl4, M.=629. 41, monoclinic, for 1330 observed reflections with I>3(I). In both complexes the stereo-chemistry about Cu(Ⅱ) is 5-coordinated with two secondary amine N atoms and twoCl- occupying sites at the base of a distorted square pyramid capped by the tertiaryamine N atom. The pair of Cl' attached to the two Cu(Ⅱ) are held in anti configuration.展开更多
The ternary interaction of 1, 5 bis(2 hydroxy 5 chlorphenyl) 3 cyanoformazan (HCPCF) with cetyltrimethylammonium bromide (CTAB) and rare earths (RE: Yb, Dy, Er and Eu) was investigated at pH 9.84 by the microsur...The ternary interaction of 1, 5 bis(2 hydroxy 5 chlorphenyl) 3 cyanoformazan (HCPCF) with cetyltrimethylammonium bromide (CTAB) and rare earths (RE: Yb, Dy, Er and Eu) was investigated at pH 9.84 by the microsurface adsorption spectral correction technique (MSASC). The aggregation of HCPCF on CTAB obeys the Langmuir isothermal adsorption and the interaction of RE with the HCPCF CTAB aggregate was first found to accord with the monolayer binding. The effects of temperature and ionic strength of solution on the aggregations were made. The binary aggregate and the ternary complex were characterized.展开更多
基金the Foundation for Academic Leader by the Education Department of Hunan province.
文摘New chiral C_2-symmetrical bis(oxazoline) compounds bearing one isobutyl-, secbutyl-, benzyl- or isopropyl-substituent at the 4-position have been prepared and characterized.
文摘The synthesis of bis(oxazoline) dicarboxylate derivatives was investigated. Diethyl-aminosulfur trifluoride (DAST) was used as a convenient cyclization reagent in the synthesis of bis(oxazoline) dicarboxylate derivatives, which can not be obtained by the general method using MsCl and Et3N as dehydrating cyclization reagent.
基金Supported by the National Natural Science Foundation of China(No. 20272002).
文摘The mass spectrometric fragmentation of 1,8-bis [ 4-substituted (oxazolin-2-yl) ] anthracenes (AnBOXes) was investigated by using mass-analyzed ion kinetic energy spectrometry under electron-impact ionization conditions. All the compounds could undergo a ring contraction by the loss of an RCH = CH2 molecule to form 1-oxazirinyl-8-(oxazolin- 2-yl) anthracene ions, which could further lose an R radical, followed by the loss of oxazoline. These ions could also eliminate an R radical and subsequently undergo ring-contraction rearrangements to lose a CHCH2O fragraent and an epoxide molecule, respectively. The ions that are formed could further lose CHCH2O and CH2 = CH fragments. Several ring-contraction rearrangements of the oxazoline ring were observed under electron-impact ionization conditions.
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.
文摘Six lanthanide complexes with bis(phenylsulfinyl)ethane(bphse) and organic bases(phen: 1,10 phenanthroline and bipy: 2,2'-bipyridine) were synthesized and characterized by elemental analysis, conductance and spectral (IR, UV Visible) data. The complexes were Ln(bphse) 2(bipy)(ClO 4) 3· n H 2O and Ln 2(bphse) 3(phen) 2(ClO 4) 6·H 2O(where Ln=Nd, Eu and Gd; n =0~2). IR spectral data confirmed that the lanthanide ions were coordinated by oxygen atoms from bphse and nitrogen atoms from phen or bipy. Exitation and emission spectra of Eu complexes were measured and discussed.
基金Project supported by the National Natural Science Foundation of China (20472063)the Key Laboratory of Organic Synthesis of Jiangsu Province
文摘(C5H5)3Ln(THF)reacted with amine bis(phenol) LH2 [ L = Me2NCH2CH2N {CH2-(2-O-C6H2-But^1-3-Me- 5)}2 ] in a 1:1 molar ratio in THF to generate the amine bis(phenolato) cyclopentadienyl lanthanide complexes LLn(C5H5) (THF)·(THF),(Ln = La (1), n =0; Ln = Sm(2), n = 1) in high yields. Complexes 1 and 2 were fully characterized by elemental analysis, NMR (for 1) and IR spectra, and X-ray structural determination. The crystal data of complex 1 are monoclinic, P21/c space goup, a= 1.1595(1) nm, b = 1.8588(2) nm, c = 1.6647(1) nm, β = 98.490(2)°, V =3.5486(5) nm^3, Z =4, Dc = 1.338 mg· m^3,μ = 1240 mm^-1, F(000)= 1488, R =0.0249, wR = 0.0568. The crystal data of complex 2 are monoclinic, P21/c sp ace goup, a = 0.9692 (1) nm, b = 1.4583 (2) nm, c = 2.8192 (3) nm, = 96.805 (2)°, V = 3.9584 (7) nm^3, Z=4, Dc =1.340 mg · ma, μ = 1.524 mm^-1, F(000)= 1668, R =0.0346, wR =0.0756. The attempts failed to synthesize the amine bis(phenolate) lanthanide alkoxides by the reactions of complexes 1 and 2 with alcohols. The preliminary results revealed that complex 1 can initiate ε-caprolactone polymerization.
基金supported by the Yunnan Province Natural Science Foundation (Nos. 2003C009M and 2003B0014Q)
文摘A novel brideed bis(β-cvclodextrin), 4, 4'-diaminodiphenyl ether-bfiged-bis (6-aimino-6-deoxv-β-cyclodextrin) 3, has been synthesized and its inclusion complexation behavior with three linear'guest dyes (AR, NR and MB ) has been investigated by. means of fluorescence spectrometry. The-result obtained demonstrated that the novel bridged bis(β-cyclodextnn) showed much higher affinities towards guest dyes than native β-cyclodextrin.
文摘1, 1'--Bis(benzylseleno)ferrocene and its platinum complex were synthesized. It was found that the platinum complex was efficient catalyst for the hydrosilylation of olefins with triethoxysilane.
基金supported by the Science and Technology development plan of Jilin Province(2015052006JH)Science and technology research project of Education Department of Jilin Province(2016219)+1 种基金Center for Science and Technology Innovation on Target recognition and photocatalytic degradation Materials of Jilin Province(20180623042TC)Science and technology development plan of Siping city(2013055)
文摘Two new three-dimensional supramolecular complexes, namely, [Cd(cba)2(bib)]n(1) and [Zn(cba)2(bib)]2 n(2)(Hcba = 2-chlorinebenzoic acid, bib = 1,4-bis(imidazol-1-yl)-butane)were hydrothermally designed and synthesized. Their structures were determined by elemental analyses, IR spectroscopy, TG, fluorescence spectroscopy, single-crystal and powder X-ray diffraction. Complex 1 exhibits a one-dimensional zigzag chain and complex 2 shows a zero-dimensional structure, which were further extended into three-dimensional supramolecular structures through hydrogen bonds and π-π stacking interactions.
基金supported by the National Natural Science Foundation of China(NSFC No.21172174)Program of Study Abroad for Young Scholar sponsored by Tianjin Municipal Education Commission
文摘The reactions of 5,5'-bis(2-acylphenyl)diazo-dipyrromethane (H2L) with CuSO4 and NiCl2 resulted in the formation of corresponding mononuclear coordination complexes 2 (CuL) and 3 (NIL). The crystal of complex 2 is of monoclinic system, space group P21 with a = 10.040(5), b = 11.900(5), c = 11.170(5) A, β = 93.057(8)°, V = 1332.8(2) A3, Z = 2, C29H28N602Cu, Mr = 556.11, Dc = 1.386 g/cm, F(000) = 578 and/z(MoKa) = 0.857 mm^-1. The crystal of complex 3 belongs to the monoclinic system, space group P21/n with a = 12.0445(6), b = 17.2101(8), c = 16.3304(6) A, β = 128.407(2)°, V = 2654.6(2) A3, Z = 4, C29H28N6O2Ni, Mr= 551.28, Dc= 1.380 g/cm, F(000) = 1152 and μ(MoKa) = 0.770 mm^-1. In both complexes, the metal ions are in square-planar geometry by coordinating to two azo N atoms and two deprotonated pyrrole N atoms. Intramolecular Cu…O=C in complex 2 and intermolecular Ni…O=C in complex 3 were found. The UV-Vis spectra and thermal stability of complexes 2 and 3 were also studied.
文摘Lanthanide perchlorate complexes with meso-bis(phenylsulfinyl)ethane(meso-BPhSE)of type[LnL3-ClO4](ClO4)2,where Ln=La~Nd,Sin,Gd~Ho,Tm~Lu,have been prepared and characterized by elementalanalysis,electrical conductance,infrared and electronic spectra,magnetic moment measurement and thermalanalysis.Meso-BPhSE acts as a neutral ligand which combines with lanthanide ion through oxygen atom ofdisulfoxide moieties.In all complexes,except that of Ho,meso-BPhSE does not behave as a complete bidentatechelate but does coordinate,at least partially,as a monodentate ligand.For the Ha complex all meso-BPhSEacts as bidentate ones.
文摘A series of new NIR dyes bearing 4-(4-morpholinyl) phenyl and substituted phenyl, were synthesized. The maximum absorption wavelengths of these dyes range from 928 nm to 990 nm.
基金supported by the Natural Science Project of Zhejiang Province(LY12B01003)
文摘A complex [Cd2Na2(BOABA)2(H2O)8]·H2O(1) was synthesized by using 2,4-bisoxyacetate-benzoic acid(H3BOABA) and Cd(OH)2. It was characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. Complex 1 shows a two-dimensional 3-connected rigid plane. The interactions between the ligand and its complex with DNA were studied by Et Br fluorescence probe. Photoluminescent studies indicate that the complex may be excellent candidates for potential photoactive materials.
基金Supported by the National Key Project of Fundamental Research( G2 0 0 0 0 7810 2 ) and the National Natural ScienceFoundation of China( No. 2 9992 5 90 - 5 )
基金National Natural Science Foundation of China(Nos.20771030 and 20671025)Development Program for Outstanding Young Teachers in Harbin Institute of Technology(No.HITQNJS.2006.029)+1 种基金Science Innovation Special Founda-tion of Harbin City in China(No.2006RFQXG037)Young Foundation of Heilongjiang Province, China(No.QC06C029)
文摘A novel nickel(II)-complex Ni[L]Cl2-CH3CN(1) containing the tridentate ligand 2,6-bis[1-(2,4,6- trimethylphenylimino)ethyl]pyridine(L) has been synthesized. The crystal structure of complex 1 was determined by single crystal X-ray diffraction analysis. The catalytic activity of complex 1 for the polymerization of ethylene was studied under activation with methylaluminoxane(MAO).
基金Supported by the National Natural Science Foundation of China(No.2 0 1730 0 6 )
文摘Complexes [MCl 2{CH 3N(CH 2CH 2N[CDS1]CR 1R 2) 2}]((3, M=Co, R 1=H, R 2=Ph ; 4, M=Fe, R 1=H, \{R 2=Ph\}; 5, M=Co, R 1=R 2=Ph) were prepared and characterized by IR spectra and elemental analysis. The combination of each of complexes 3-5 with ethylaluminoxane(EAO), respectively, was found to be moderately active for ethylene oligomerization to low carbon olefins. The activity of 113 kg oligomers·mol -1 Co·h -1 for complex 3(100 mol of EAO, 180 ℃ and 1 8 MPa ethylene) was observed with a selectivity of 93% to C 4-10 olefins, of which 96% were linear C4 10 olefins. The catalytic properties of complexes 3-5 were compared with those of analogous P,P coordinated complexes [MCl 2{CH 3N(CH 2CH 2PPh 2) 2}](1, M=Co; 2, \{M=\}Fe).
文摘Dinuclear Cu(Ⅱ) complexes (Cu,LCl4). 2H2O and Cu2L'Cl4 are pre-pared and characterized by X-ray structure analysis. (Cu2I-Cl4). 2H2O, C20 H40N6Cu2Cl4O2, Mr=665. 54, monoclinic, 6 for 188l observed reflections with I>3(I). Cu2L'Cl4, C20H36N6Cu2Cl4, M.=629. 41, monoclinic, for 1330 observed reflections with I>3(I). In both complexes the stereo-chemistry about Cu(Ⅱ) is 5-coordinated with two secondary amine N atoms and twoCl- occupying sites at the base of a distorted square pyramid capped by the tertiaryamine N atom. The pair of Cl' attached to the two Cu(Ⅱ) are held in anti configuration.
基金ProjectsupportedbytheNaturalScienceFoundationofAnhuiProvince (No .0 1 0 45 30 1 )andtheAnhuiProvincialScienceandTechnologyforExcellentYouths
文摘The ternary interaction of 1, 5 bis(2 hydroxy 5 chlorphenyl) 3 cyanoformazan (HCPCF) with cetyltrimethylammonium bromide (CTAB) and rare earths (RE: Yb, Dy, Er and Eu) was investigated at pH 9.84 by the microsurface adsorption spectral correction technique (MSASC). The aggregation of HCPCF on CTAB obeys the Langmuir isothermal adsorption and the interaction of RE with the HCPCF CTAB aggregate was first found to accord with the monolayer binding. The effects of temperature and ionic strength of solution on the aggregations were made. The binary aggregate and the ternary complex were characterized.