Three complexes, [Pr（NO3）3（HL）2] （1）, [Nd（NO3）3（HL）2] （2） and [Er（NO3）3（HL）2] ·0.5H2O （3）, were synthesized from the reaction of a Schiff base ligand 2-[ （4-methylphenylimino）methyl ]-6-methox...Three complexes, [Pr（NO3）3（HL）2] （1）, [Nd（NO3）3（HL）2] （2） and [Er（NO3）3（HL）2] ·0.5H2O （3）, were synthesized from the reaction of a Schiff base ligand 2-[ （4-methylphenylimino）methyl ]-6-methoxyphenol （C15 H15 NO2, HL） with Ln（NO3）3·6H2O （Ln = Pr, Nd, Er）. Characterization by single-crystal X-ray diffraction technique, elemental analysis, molar conductance, FT-IR, UV-Vis, ^1H NMR and thermal analysis shows the title complexes are neutral molecules where the central Ln（ Ⅲ） ion is ten-coordinated in biapical anti-hexahedron prism geometry, with four oxygen atoms of the phenolic hydroxy and methoxy groups in the two bidentate Schiff base ligands and six oxygen atoms provided by the three bidentate NO3 - anions. Additionally, the kinetic mechanism of thermal decomposition of complex 3 was determined with a TG-DTG curves by both integral and differential methods. The functions of thermal decomposition reaction mechanism and the equation of kinetic compensation effect were obtained.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
o-Vanillin-semicarbazide C_9H_(11) N_3O_3, written simply as cpl, M_r= 209. 21 is a yellow crystal. Cp1 crystallizes in the monoclinic space group P2_1/a with unit cell parameters: a= 6. 596(6) , b=20. 534(6) , c=7. 1...o-Vanillin-semicarbazide C_9H_(11) N_3O_3, written simply as cpl, M_r= 209. 21 is a yellow crystal. Cp1 crystallizes in the monoclinic space group P2_1/a with unit cell parameters: a= 6. 596(6) , b=20. 534(6) , c=7. 108(6) , β=99.00(8)°,Z=4, D_c=1. 46 g/cm￣3, V=951 , μ=1. 05cm￣(-1), F(000)=440, R=0. 058, R_w =0. 056. Salicylaldehyde-semicarbazide C_8H_9N_3O_2, written simply as cp2, M_r=179.18 is a colorless crystal. cp2 crystallizes in the triclinic space group P1 with a= 5.276 (3), b=7. 116(4) , c=24. 286(3), a=86. 72(3) ,β=83. 99(3),γ=68.22(5) °,Z=4 , D_c=1. 41 g/cm￣3, V=841.9,μ=0. 98 cm ￣(-1),F (000)=376, R=0.066,R_w= 0. 067. The dihedral angle between plane 1 formed by benzene ring and plane 2 by N(2) , C(2), N(3), and O(3) is 161.40°for cp1, while the angle between plane 3 made by benzene ring (or benzene ring in the other molecule)and plane 4 by N(2) , C (18) , N(3) and O(3) For N(5),C(28) , O(4) , and N(6)]is 15. 07°(or 15. 15°) for cp2. The temperature of the thermodecomposition of cp1 is higher than that of cp2.展开更多
The activity on O-2 of ligands from ovanillin and amino acid and their complexes were studied in this paper.Results showed that ligands and their complexes may inhibit the formation of O-2.Zn(Ⅱ)complexes di...The activity on O-2 of ligands from ovanillin and amino acid and their complexes were studied in this paper.Results showed that ligands and their complexes may inhibit the formation of O-2.Zn(Ⅱ)complexes display remarkable activity of inhibiting the formation of O-2.展开更多
The title complex Cu(L)2 (HL=o-vanillin hydrazone) was synthesized by the reaction of Cu(CH3COO)2·H2O with o-vanillin hydrazone in the ethanol. It was characterized by elemental analysis, IR and X-ray single crys...The title complex Cu(L)2 (HL=o-vanillin hydrazone) was synthesized by the reaction of Cu(CH3COO)2·H2O with o-vanillin hydrazone in the ethanol. It was characterized by elemental analysis, IR and X-ray single crystal structure analysis. The crystal of the title complex [Cu(C8H9N2O2)2] belongs to triclinic, space group P1 with a=0.457 57(8) nm, b=1.333 2(2) nm, c=1.386 0(3) nm, α=108.955(2)°, β=90.868(2)°, γ=95.859(2)°, V=0.794 4(2) nm3, Z=2, Dc=1.647 Mg·m-3, μ=1.406 mm-1, F(000)=406, and final R1=0.035 1, wR2=0.096 3. The complex comprises a four-coordinated copper(Ⅱ) center, with an N2O2 planar coordination environment. The molecules are packed in one-dimensional chain polymer though the N…Cu interaction from adjacent molecules, respectively.展开更多
The new solid complexes [LnL2(NO3)2]NO3 (L=C18H23NO2, N-2-hydroxy-3-me thoxy-benzaldehyde-1-aminoadamanantane, Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, H o, Er, Tm, Yb, Lu, Y) of rare earth nitrates with Schiff base der...The new solid complexes [LnL2(NO3)2]NO3 (L=C18H23NO2, N-2-hydroxy-3-me thoxy-benzaldehyde-1-aminoadamanantane, Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, H o, Er, Tm, Yb, Lu, Y) of rare earth nitrates with Schiff base derived from o-van illin and adamantaneamine have been synthesized in non-aqueous system and charac terized by elemental analysis, molar conductance, infrared spectra, 1H NMR spect ra, thermal analysis. The coordination modes of the bonding in these complexes w ere discussed and the possible structure were proposed. Every central Ln(III) io n in the complexes coordinates with both two Schiff base ligands via four oxygen atoms of the phenol hydroxy groups and methoxy groups and two nitrates via thei r four oxygen atoms. Their coordination numbers are eight. In addition, the anti bacterial activity of the Schiff base ligand and the complexes were studied.展开更多
文摘Three complexes, [Pr（NO3）3（HL）2] （1）, [Nd（NO3）3（HL）2] （2） and [Er（NO3）3（HL）2] ·0.5H2O （3）, were synthesized from the reaction of a Schiff base ligand 2-[ （4-methylphenylimino）methyl ]-6-methoxyphenol （C15 H15 NO2, HL） with Ln（NO3）3·6H2O （Ln = Pr, Nd, Er）. Characterization by single-crystal X-ray diffraction technique, elemental analysis, molar conductance, FT-IR, UV-Vis, ^1H NMR and thermal analysis shows the title complexes are neutral molecules where the central Ln（ Ⅲ） ion is ten-coordinated in biapical anti-hexahedron prism geometry, with four oxygen atoms of the phenolic hydroxy and methoxy groups in the two bidentate Schiff base ligands and six oxygen atoms provided by the three bidentate NO3 - anions. Additionally, the kinetic mechanism of thermal decomposition of complex 3 was determined with a TG-DTG curves by both integral and differential methods. The functions of thermal decomposition reaction mechanism and the equation of kinetic compensation effect were obtained.
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.
文摘o-Vanillin-semicarbazide C_9H_(11) N_3O_3, written simply as cpl, M_r= 209. 21 is a yellow crystal. Cp1 crystallizes in the monoclinic space group P2_1/a with unit cell parameters: a= 6. 596(6) , b=20. 534(6) , c=7. 108(6) , β=99.00(8)°,Z=4, D_c=1. 46 g/cm￣3, V=951 , μ=1. 05cm￣(-1), F(000)=440, R=0. 058, R_w =0. 056. Salicylaldehyde-semicarbazide C_8H_9N_3O_2, written simply as cp2, M_r=179.18 is a colorless crystal. cp2 crystallizes in the triclinic space group P1 with a= 5.276 (3), b=7. 116(4) , c=24. 286(3), a=86. 72(3) ,β=83. 99(3),γ=68.22(5) °,Z=4 , D_c=1. 41 g/cm￣3, V=841.9,μ=0. 98 cm ￣(-1),F (000)=376, R=0.066,R_w= 0. 067. The dihedral angle between plane 1 formed by benzene ring and plane 2 by N(2) , C(2), N(3), and O(3) is 161.40°for cp1, while the angle between plane 3 made by benzene ring (or benzene ring in the other molecule)and plane 4 by N(2) , C (18) , N(3) and O(3) For N(5),C(28) , O(4) , and N(6)]is 15. 07°(or 15. 15°) for cp2. The temperature of the thermodecomposition of cp1 is higher than that of cp2.
文摘The activity on O-2 of ligands from ovanillin and amino acid and their complexes were studied in this paper.Results showed that ligands and their complexes may inhibit the formation of O-2.Zn(Ⅱ)complexes display remarkable activity of inhibiting the formation of O-2.
文摘The title complex Cu(L)2 (HL=o-vanillin hydrazone) was synthesized by the reaction of Cu(CH3COO)2·H2O with o-vanillin hydrazone in the ethanol. It was characterized by elemental analysis, IR and X-ray single crystal structure analysis. The crystal of the title complex [Cu(C8H9N2O2)2] belongs to triclinic, space group P1 with a=0.457 57(8) nm, b=1.333 2(2) nm, c=1.386 0(3) nm, α=108.955(2)°, β=90.868(2)°, γ=95.859(2)°, V=0.794 4(2) nm3, Z=2, Dc=1.647 Mg·m-3, μ=1.406 mm-1, F(000)=406, and final R1=0.035 1, wR2=0.096 3. The complex comprises a four-coordinated copper(Ⅱ) center, with an N2O2 planar coordination environment. The molecules are packed in one-dimensional chain polymer though the N…Cu interaction from adjacent molecules, respectively.
文摘The new solid complexes [LnL2(NO3)2]NO3 (L=C18H23NO2, N-2-hydroxy-3-me thoxy-benzaldehyde-1-aminoadamanantane, Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, H o, Er, Tm, Yb, Lu, Y) of rare earth nitrates with Schiff base derived from o-van illin and adamantaneamine have been synthesized in non-aqueous system and charac terized by elemental analysis, molar conductance, infrared spectra, 1H NMR spect ra, thermal analysis. The coordination modes of the bonding in these complexes w ere discussed and the possible structure were proposed. Every central Ln(III) io n in the complexes coordinates with both two Schiff base ligands via four oxygen atoms of the phenol hydroxy groups and methoxy groups and two nitrates via thei r four oxygen atoms. Their coordination numbers are eight. In addition, the anti bacterial activity of the Schiff base ligand and the complexes were studied.
