The new complex, {[Zn（L）（chdc）]＇2H2O}n （Hzchdc = 1,4-cyclohexanedicarboxylic acid, L = 1,3-bis（benzimidazol-l-yl-methylene）benzene）, was hydrothermally synthesized and characterized by elemental analysis, IR ...The new complex, {[Zn（L）（chdc）]＇2H2O}n （Hzchdc = 1,4-cyclohexanedicarboxylic acid, L = 1,3-bis（benzimidazol-l-yl-methylene）benzene）, was hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, TGA and single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group C2/c with a = 14.5258（12）, b = 18.4438（15）, c = 21.1634（18） A, fl = 94.172（1）~, V = 5654.9（8） A3, Z = 8, C30H32NaO6Zn, Mr = 609.97, D,. = 1.433 g/cm3 and/~ = 0.919 mm-1. The zinc atom is six-coordinated by two N and four O atoms, forming a distorted octahedral geometry in the complex. The complex has an infinite one-dimensional （1D） loop-like chain structure which is extended into a two-dimensional （2D） supramolecular network structure via two kinds of ;π-πstacking interactions. The solid state fluorescence properties of the complex were investigated.展开更多
A new Co（Ⅱ） coordination polymer, [Co（1,4-chdc）（L）（H2O）]n（1）, was synthesized under hydrothermal condition（1,4-H2chdc = 1,4-cyclohexanedicarboxylic acid, L = 2-（4-fluoro-phenyl）-1 H-imidazo[4,5-f][1,10]p...A new Co（Ⅱ） coordination polymer, [Co（1,4-chdc）（L）（H2O）]n（1）, was synthesized under hydrothermal condition（1,4-H2chdc = 1,4-cyclohexanedicarboxylic acid, L = 2-（4-fluoro-phenyl）-1 H-imidazo[4,5-f][1,10]phenanthroline）. Its crystal structure was determined by single-crystal X-ray diffraction. 1 crystallizes in triclinic, space group P1 with a = 8.790（5）, b = 10.486（5）, c = 13.305（5） ?, α = 87.391（5）, β = 82.925（5）, γ = 81.841（5）o, V = 1204.2（10） ?3, Z = 2, C27H23FN4O5Co, Mr = 561.42, Dc = 1.548 g/cm3, F（000） = 578, μ（Mo Ka） = 0.769 mm-1, R = 0.0415 and wR = 0.1043. In 1, each 1,4-chdc anion bridges two neighboring Co（Ⅱ） atoms to give a chain structure. The L ligands are attached on one side of the chain through chelating the Co（Ⅱ） atoms, and are stacked with those of an adjacent chain through π-π interactions, yielding a double-chain structure. The double-chain structures are linked into a supramolecular layer structure through N–H···O hydrogen-bonding interactions between the adjacent double-chain structures. Moreover, the thermal behavior of 1 was also studied.展开更多
Solvothermal reactions of 3,5-dimethyl-2,6-bis（3-（pyrid-2-yl）-1,2,4-triazolyl） pyridine （L）, 1,4-benzendicarboxylic acid （H2bdc）, and transitional metal cations of M11 （M = Mn, Co, Cd） in the presence of oxa...Solvothermal reactions of 3,5-dimethyl-2,6-bis（3-（pyrid-2-yl）-1,2,4-triazolyl） pyridine （L）, 1,4-benzendicarboxylic acid （H2bdc）, and transitional metal cations of M11 （M = Mn, Co, Cd） in the presence of oxalic acid （H2ox） afford three novel supramolecular polymers （CPs）, namely, {[M2（ox）（L）2][bdc][M2（Hox）2（OH）（H2O）4]·3H2O}n （M = Mn for 1, Co for 2, Cd for 3）. Single-crystal X-ray diffraction analysis reveals that complexes 1-3 are isostructural and the 3D supramolecular structure was connected through non-covalent interactions. With the help of H2ox, the L ligands cheated with center atoms forming a butterfly [M2（ox）（L）2]2＋ building block. The bdc2- ligand linked with the unprecedented [M2（Hox）2（OH）2（H2O）4] units through strong O-H...O hydrogen bonds forming a zigzag chain, which are further connected through π-π interactions between L and bdc2- ligands to form a 3D supramolecular structure. Moreover, elemental analyses, IR, thermogravimetric, PXRD and luminescence have been investigated.展开更多
Five novel bis—(N—alkyl—N,N—dimethyl ammoni(?)n)polyethyleneglyool ether salts prepared by our previously reported proced(?)e show high catalytic efficiency in the condensation of 1,4—diacetyl— 2,5—piperazinedi...Five novel bis—(N—alkyl—N,N—dimethyl ammoni(?)n)polyethyleneglyool ether salts prepared by our previously reported proced(?)e show high catalytic efficiency in the condensation of 1,4—diacetyl— 2,5—piperazinedione and aldehydes at both higher and lower temperature even in lower concentration.They al so show catalytic selectivity at lower temperature.展开更多
Title compound was prepared from dimethyl 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)pyridine-3,5- dicarboxylate by hydrolysis using tetrabutylammonium bromide as PTC in MeOH-H2O(7.5∶1) at 70℃ for 5h with an overall ...Title compound was prepared from dimethyl 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)pyridine-3,5- dicarboxylate by hydrolysis using tetrabutylammonium bromide as PTC in MeOH-H2O(7.5∶1) at 70℃ for 5h with an overall yield of 64%.展开更多
基金Supported by National Training Programs of Innovation and Entrepreneurship for the Local University Undergraduate (No.201210081005)Undergraduate Innovation Programs of Hebei United University (No.X2012005)
文摘The new complex, {[Zn（L）（chdc）]＇2H2O}n （Hzchdc = 1,4-cyclohexanedicarboxylic acid, L = 1,3-bis（benzimidazol-l-yl-methylene）benzene）, was hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, TGA and single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group C2/c with a = 14.5258（12）, b = 18.4438（15）, c = 21.1634（18） A, fl = 94.172（1）~, V = 5654.9（8） A3, Z = 8, C30H32NaO6Zn, Mr = 609.97, D,. = 1.433 g/cm3 and/~ = 0.919 mm-1. The zinc atom is six-coordinated by two N and four O atoms, forming a distorted octahedral geometry in the complex. The complex has an infinite one-dimensional （1D） loop-like chain structure which is extended into a two-dimensional （2D） supramolecular network structure via two kinds of ;π-πstacking interactions. The solid state fluorescence properties of the complex were investigated.
基金Supported by the National Natural Science Foundation of China(No.21607051)
文摘A new Co（Ⅱ） coordination polymer, [Co（1,4-chdc）（L）（H2O）]n（1）, was synthesized under hydrothermal condition（1,4-H2chdc = 1,4-cyclohexanedicarboxylic acid, L = 2-（4-fluoro-phenyl）-1 H-imidazo[4,5-f][1,10]phenanthroline）. Its crystal structure was determined by single-crystal X-ray diffraction. 1 crystallizes in triclinic, space group P1 with a = 8.790（5）, b = 10.486（5）, c = 13.305（5） ?, α = 87.391（5）, β = 82.925（5）, γ = 81.841（5）o, V = 1204.2（10） ?3, Z = 2, C27H23FN4O5Co, Mr = 561.42, Dc = 1.548 g/cm3, F（000） = 578, μ（Mo Ka） = 0.769 mm-1, R = 0.0415 and wR = 0.1043. In 1, each 1,4-chdc anion bridges two neighboring Co（Ⅱ） atoms to give a chain structure. The L ligands are attached on one side of the chain through chelating the Co（Ⅱ） atoms, and are stacked with those of an adjacent chain through π-π interactions, yielding a double-chain structure. The double-chain structures are linked into a supramolecular layer structure through N–H···O hydrogen-bonding interactions between the adjacent double-chain structures. Moreover, the thermal behavior of 1 was also studied.
基金supported by the National Natural Science Foundation of China (No. 21101097)Natural Science Foundation of Shandong Province (ZR2010BQ023)the State Key Laboratory of Solid Lubrication (No. 0701)
文摘Solvothermal reactions of 3,5-dimethyl-2,6-bis（3-（pyrid-2-yl）-1,2,4-triazolyl） pyridine （L）, 1,4-benzendicarboxylic acid （H2bdc）, and transitional metal cations of M11 （M = Mn, Co, Cd） in the presence of oxalic acid （H2ox） afford three novel supramolecular polymers （CPs）, namely, {[M2（ox）（L）2][bdc][M2（Hox）2（OH）（H2O）4]·3H2O}n （M = Mn for 1, Co for 2, Cd for 3）. Single-crystal X-ray diffraction analysis reveals that complexes 1-3 are isostructural and the 3D supramolecular structure was connected through non-covalent interactions. With the help of H2ox, the L ligands cheated with center atoms forming a butterfly [M2（ox）（L）2]2＋ building block. The bdc2- ligand linked with the unprecedented [M2（Hox）2（OH）2（H2O）4] units through strong O-H...O hydrogen bonds forming a zigzag chain, which are further connected through π-π interactions between L and bdc2- ligands to form a 3D supramolecular structure. Moreover, elemental analyses, IR, thermogravimetric, PXRD and luminescence have been investigated.
文摘Five novel bis—(N—alkyl—N,N—dimethyl ammoni(?)n)polyethyleneglyool ether salts prepared by our previously reported proced(?)e show high catalytic efficiency in the condensation of 1,4—diacetyl— 2,5—piperazinedione and aldehydes at both higher and lower temperature even in lower concentration.They al so show catalytic selectivity at lower temperature.
文摘Title compound was prepared from dimethyl 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)pyridine-3,5- dicarboxylate by hydrolysis using tetrabutylammonium bromide as PTC in MeOH-H2O(7.5∶1) at 70℃ for 5h with an overall yield of 64%.
