Metal-organic frameworks [Co(Hbidc)(H2O)2] (1) and [Mn(Hbidc)(H2O)] (2), with multidentate 1H-benzimidazole-5,6-dicarboxylic acid (H3bidc) ligand, have been synthesized under hydro/solvothermal conditions and structurally characterized by elemental analysis, IR spectrum, and single-crystal X-ray diffraction. Single-crystal X-ray diffraction analysis revealed that the center Co atom of complex 1 is six-coordinated with three-dimensional supramolecular structure and center Mn of complex 2 is five-coordinated with exhibiting a 2D layered network. The photodegradation of Crystal violet dye and Methylene blue dye were studied firstly by complexes 1 and 2 as photocatalysts. Research result indicates that the degradation rate for complex 1 can reach 89.85% , 90.6% and that for complex 2 can reach 88.28% , 79.48% . At the same time, corresponding to photocatalytic kinetics was performed.

中文翻译：

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两种基于 1H-苯并咪唑-5,6-二羧酸的过渡配合物：染料的合成、结构和光催化降解

金属有机骨架 [Co(Hbidc)(H2O)2] (1) 和 [Mn(Hbidc)(H2O)] (2)，具有多齿 1H-苯并咪唑-5,6-二羧酸 (H3bidc) 配体，已被在水/溶剂热条件下合成，并通过元素分析、红外光谱和单晶 X 射线衍射进行结构表征。单晶X射线衍射分析表明，配合物1的中心Co原子是六配位的，具有三维超分子结构，配合物2的中心Mn是五配位的，呈现出二维层状网络。首次以配合物1和配合物2为光催化剂研究了结晶紫染料和亚甲蓝染料的光降解。研究结果表明，配合物1的降解率可达89.85%、90.6%，配合物2的降解率可达88.28%、79.48%。同时，