A NEW 2D COBALT(II) COORDINATION POLYMER CONSTRUCTED FROM 1,2,4,5-BENZENETETRACARBOXYLATE AND FLEXIBLE BIS(BENZIMIDAZOLE) LIGANDS

1 2 4 5-benzenetetracarboxylate bis(benzimidazole) cobalt(II) fluorescence property.

ИОДОВИСМУТАТНЫЙ КОМПЛЕКС (Bu4N)3[Bi3I12]: КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА НОВОЙ ПОЛИМОРФНОЙ МОДИФИКАЦИИ, ВАРИАЦИОННОЕ РЕШЕНИЕ ЗАДАЧИ ОБ АНГАРМОНИЧЕСКИХ КОЛЕБАНИЯХ МОЛЕКУЛ В ЦЕНТРАЛЬНО-СИЛОВОМ ПОЛЕ, ...

Том 56, 4 ЖУРНАЛ СТРУКТУРНОЙ ХИМИИ Июль UDC 548.73:547.13:546.73 A NEW 2D COBALT(II) COORDINATION POLYMER CONSTRUCTED FROM 1,2,4,5-BENZENETETRACARBOXYLATE AND FLEXIBLE BIS(BENZIMIDAZOLE) LIGANDS X. Du, R. Yang, X.X. Wang, G.H. Cui College of Chemical Engineering, Hebei United University, Tangshan, Hebei Province, P. R. China E-mail: tscghua@126.com Received September 16, 2013 A new 2D cobalt(II) coordination polymers namely {[Co2(btec)(L)2]4H2O}n (1), where btec = = 1,2,4,5-benzenetetracarboxylate and L = 1,3-bis(5,6-dimethylbenzimidazol-l-yl)-2-propanol, are hydrothermally synthesized and characterized by elemental analyses, IR spectroscopy, and single crystal X-ray diffraction analyses. <...> The complex possesses a binodal (3,4)-connected two-dimensional layered structure bridged by btec and L ligands. <...> The fluorescence and catalytic properties of the complex are also investigated. <...> It is well known that the coordination geometries of the metal centers and the coordination behavior of organic ligands are the main keys to achieve the target coordination polymers. <...> Benzene-based multicarboxylic acid ligands have been widely used as good candidates for the construction of coordination polymers [ 7—9]. <...> To the best of our knowledge, coordination polymers based on flexible bis(5,6-dimethybenzimidazole) and multicarboxylic acid ligands have only been scarcely studied [ 14—16 ]. <...> In this report, we focus our continuing efforts on coordination polymers based on flexible bis(5,6-dimethybenzimidazole) ligands [ 17—20 ]; here we report the preparation, crystal structure, and fluorescence properties of a new two-dimensional framework {[Co2(btec)(L)2]4H2O}n (1) L = 1,3-bis(5,6-dimethylbenzimidazol-l-yl)-2-propanol). <...> The catalytic performance of the complex was investigated with degradation of methyl orange through a typical process: 50 mg of the title compounds and 30 mg of sodium persulfate were mixed together with 150 ml of the methyl orange solution (10 mg/l). <...> Samples of the mixture were withdrawn and analyzed periodically using a SHANGHAI JINGKE 722 N spectrophotometer at 506 nm. <...> The degradation efficiency of methyl orange is defined as follows: where C0 (mg/l) is the initial concentration of methyl orange and Ct <...>

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