Controlled Self-assembly of Two Coordination Polymers via subtly Varying Bis(2-methyl imidazole) Ligands:from 3-Connected(6,3) Net to 4-Connected sql Net

【摘要】 Two coordination polymers constructed from 3,4-thiophenedicarboxylic acid and bis(2-methyl imidazole) ligands, namely, {[Cd2(tdc)2(bip)2]·7H2O}n(1) and [Cd(tdc)(bib)]n(2)(H2tdc = 3,4-thiophenedicarboxylic acid, bip = 1,3-bis-(imidazol-2-methyl)propane and bib = 1,4-bis(imidazol-2-methyl)butane), have been synthesized and structurally characterized by single-crystal X-ray diffraction. Structural analyses reveal that 1 exhibits a two-dimensional(2D) layered network with 3-connected(6,3) topology, which is further connected into a threedimensional(3D) supramolecular structure by intermolecular hydrogen bonds. However, 2 features a 2D network which can be rationalized as a 4-connected sql net. The results indicate the subtle difference of auxiliary bis(imidazol-2-methyl) ligands may lead to diverse architectures. Moreover, they exhibit luminescence emission in the solid state at room temperature.更多还原

【Abstract】 Two coordination polymers constructed from 3,4-thiophenedicarboxylic acid and bis(2-methyl imidazole) ligands, namely, {[Cd2(tdc)2(bip)2]·7H2O}n(1) and [Cd(tdc)(bib)]n(2)(H2tdc = 3,4-thiophenedicarboxylic acid, bip = 1,3-bis-(imidazol-2-methyl)propane and bib = 1,4-bis(imidazol-2-methyl)butane), have been synthesized and structurally characterized by single-crystal X-ray diffraction. Structural analyses reveal that 1 exhibits a two-dimensional(2D) layered network with 3-connected(6,3) topology, which is further connected into a threedimensional(3D) supramolecular structure by intermolecular hydrogen bonds. However, 2 features a 2D network which can be rationalized as a 4-connected sql net. The results indicate the subtle difference of auxiliary bis(imidazol-2-methyl) ligands may lead to diverse architectures. Moreover, they exhibit luminescence emission in the solid state at room temperature.更多还原