The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobal...The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobalt ferrite. The mean particle sizes of CoFe2O4 samples annealed at 400 ℃ and 600 ℃ were ca. 6 and 25 nm, respectively as obtained by transmission electron microscopy (TEM). The magnetic measurements indicated that nano-particles obtained at 400 ℃ were superparamagnetic while that prepared at 600 ℃ were ferrimagnetic.展开更多
A Zn(II) coordination polymer [Zn(pht)(pzH)2]n (where pht2-=dianion of o-phthalic acid, pzH=pyrazole) has been synthesized and the structure was determined by X-ray diffraction. The complex crystallizes in the monocli...A Zn(II) coordination polymer [Zn(pht)(pzH)2]n (where pht2-=dianion of o-phthalic acid, pzH=pyrazole) has been synthesized and the structure was determined by X-ray diffraction. The complex crystallizes in the monoclinic space group P21/c, a=0.821 39(10) nm, b=1.662 2(2) nm, c=1.156 42(14) nm, β=100.349(2)°, V=1.553 2(3) nm3, Z=4. Both carboxylate groups of the phthalate dianion coordinated in a monodentate mode bridged two Zn(II) atoms forming the structure of 1-D chain. The pyrazole ligands play two different roles: one only coordinates the metal atom and the other joins the coordination polymer into a 2-D sheet via N-H...O and C-H...O hydrogen bonds besides the coordination property. A blue photoluminescence peak at 435 nm was observed in solid state at room temperature. CCDC: 227946.展开更多
A planar metal complex NiL, H2L=acenaphthenequinone bis(S benzyldithiocarbazate), 1, has been prepared via the template effect of nickel ion. Crystal structure of 1 was determined by X ray diffraction analysis and sho...A planar metal complex NiL, H2L=acenaphthenequinone bis(S benzyldithiocarbazate), 1, has been prepared via the template effect of nickel ion. Crystal structure of 1 was determined by X ray diffraction analysis and shows the planar coordination configuration around the central nickel atom. Z scan measurements show that 1 is a transition metal complex exhibiting high third order nonlinear optical effect.展开更多
A novel one-dimensional chain manganese(II) compound Mn(trz)2ClphthH, (trz=1,2,4-triazole, phthH=hydrogen phthalate), 1, was synthesized and structurally characterized. It crystallizes in monoclinic system, space grou...A novel one-dimensional chain manganese(II) compound Mn(trz)2ClphthH, (trz=1,2,4-triazole, phthH=hydrogen phthalate), 1, was synthesized and structurally characterized. It crystallizes in monoclinic system, space group P2 / c with a=1.381 1(11) nm, b=0.815 5(7) nm, c=0.735 4(6) nm, β=94.667(15)°, V=0.825 5(12) nm3. It consists of one dimensional cationic manganese(II) chain and uncoordinated hydrogen phthalate anions. The manganese(II) ions are bridged with two 1,2,4-traizoles and one chloride anion along the cationic chain, in which the weak antiferromagnetic exchange occurs between manganese(II) atoms. CCDC: 267461.展开更多
(Ph4P)2[Ni3(u-SC3H6S)4].2CH3CN was obtained from the reaction of NiCl2.6H2O,Na2(1,2-pdt)(pdtH2=CH3CH(SH)CH2SH) and Ph4PBr.Mr=1361. 80, P21/c,a=10.802(2),b=30.111 (7),c=9. 907(3) A ,B=93. 60(3) ;V= 3216. 0 A3;Z=2,Dc=1....(Ph4P)2[Ni3(u-SC3H6S)4].2CH3CN was obtained from the reaction of NiCl2.6H2O,Na2(1,2-pdt)(pdtH2=CH3CH(SH)CH2SH) and Ph4PBr.Mr=1361. 80, P21/c,a=10.802(2),b=30.111 (7),c=9. 907(3) A ,B=93. 60(3) ;V= 3216. 0 A3;Z=2,Dc=1. 41g/cm3. The three Ni atoms of the anion are linearly arranged and bridged by four sulfur atoms from the four 1 ,2-propyldithiolato ligands.展开更多
文摘The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobalt ferrite. The mean particle sizes of CoFe2O4 samples annealed at 400 ℃ and 600 ℃ were ca. 6 and 25 nm, respectively as obtained by transmission electron microscopy (TEM). The magnetic measurements indicated that nano-particles obtained at 400 ℃ were superparamagnetic while that prepared at 600 ℃ were ferrimagnetic.
文摘A Zn(II) coordination polymer [Zn(pht)(pzH)2]n (where pht2-=dianion of o-phthalic acid, pzH=pyrazole) has been synthesized and the structure was determined by X-ray diffraction. The complex crystallizes in the monoclinic space group P21/c, a=0.821 39(10) nm, b=1.662 2(2) nm, c=1.156 42(14) nm, β=100.349(2)°, V=1.553 2(3) nm3, Z=4. Both carboxylate groups of the phthalate dianion coordinated in a monodentate mode bridged two Zn(II) atoms forming the structure of 1-D chain. The pyrazole ligands play two different roles: one only coordinates the metal atom and the other joins the coordination polymer into a 2-D sheet via N-H...O and C-H...O hydrogen bonds besides the coordination property. A blue photoluminescence peak at 435 nm was observed in solid state at room temperature. CCDC: 227946.
文摘A planar metal complex NiL, H2L=acenaphthenequinone bis(S benzyldithiocarbazate), 1, has been prepared via the template effect of nickel ion. Crystal structure of 1 was determined by X ray diffraction analysis and shows the planar coordination configuration around the central nickel atom. Z scan measurements show that 1 is a transition metal complex exhibiting high third order nonlinear optical effect.
文摘A novel one-dimensional chain manganese(II) compound Mn(trz)2ClphthH, (trz=1,2,4-triazole, phthH=hydrogen phthalate), 1, was synthesized and structurally characterized. It crystallizes in monoclinic system, space group P2 / c with a=1.381 1(11) nm, b=0.815 5(7) nm, c=0.735 4(6) nm, β=94.667(15)°, V=0.825 5(12) nm3. It consists of one dimensional cationic manganese(II) chain and uncoordinated hydrogen phthalate anions. The manganese(II) ions are bridged with two 1,2,4-traizoles and one chloride anion along the cationic chain, in which the weak antiferromagnetic exchange occurs between manganese(II) atoms. CCDC: 267461.
文摘Compound (Ph3PCH2Ph)[Ni (OSNC5H3)2] . DMF was obtained from the reaction.of NiCl2,Na2(OSNC5H3)and Ph3PCH2PhCl. Mr = 735. 53,monoclinic,P21/ c,a=9. 857(6),b=17. 594(9),c=21. 369(10) A,β=102. 85(4)°,V=3613. 1A3,Z = 4,Dc=1. 35g/cm3,λ(Mo-Ka) = 0.71073A.μ=7. 3cm-1,F(000) = 1532,The nickel (Ⅲ) ion is coordinated by two 2-mercapto-3-pyridinolate ligands to give an approximate square-plannar configuration with cis-geometry.
文摘(Ph4P)2[Ni3(u-SC3H6S)4].2CH3CN was obtained from the reaction of NiCl2.6H2O,Na2(1,2-pdt)(pdtH2=CH3CH(SH)CH2SH) and Ph4PBr.Mr=1361. 80, P21/c,a=10.802(2),b=30.111 (7),c=9. 907(3) A ,B=93. 60(3) ;V= 3216. 0 A3;Z=2,Dc=1. 41g/cm3. The three Ni atoms of the anion are linearly arranged and bridged by four sulfur atoms from the four 1 ,2-propyldithiolato ligands.