Self-assembly of two 2D cobalt(II) coordination polymers constructed from 5-tert-butyl isophthalic acid and flexible bis(benzimidazole)-based ligands |
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Authors: | Xiao Xiao Wang Ying Na Zhao Guang Yue Li Guang Hua Cui |
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Institution: | 1. College of Chemical Engineering, Hebei United University, Tangshan, 063009, Hebei, People’s Republic of China
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Abstract: | Two cobalt(II) coordination polymers, Co(L1)(tbi)(H2O)] n (1) and Co(L2)(tbi)] n (2) (L1 = 1,4-bis(benzimidazole)butane, L2 = 1,4-bis(2-methylbenzimidazole)butane, H2tbi = 5-tert-butyl isophthalic acid) have been synthesized under hydrothermal conditions and characterized by physicochemical and spectroscopic methods as well as by single-crystal X-ray diffraction analysis. Both complexes exhibit similar 2D (4,4) layer structures, constructed from tbi2? and bis(benzimidazole)-based bridging ligands. The cobalt centers display different coordination environments, with an octahedral geometry in 1 and a distorted square-pyramidal configuration in 2. The thermal stabilities, fluorescence and catalytic properties of both complexes have been investigated. |
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