两个基于2,5-二甲氧基对苯二甲酸和咪唑衍生物的超分子钴配位聚合物的结构及光催化反应  

Two Supra Molecular Co(Ⅱ)Coordination Polymers Based on 2,5-Dimethoxyterephthalic Acid and Imidazole Derivatives:Crystal Structures and Photo-Catalytic Reactions

作　　者：石明凤 顾江红 卢森源 徐中轩 SHI Mingfeng;GU Jianghong;LU Senyuan;XU Zhongxuan(School of Chemistry and Chemical Engineering, Zunyi Normal College, Zunyi 563002,China)

机构地区：[1]遵义师范学院化学化工学院,遵义563002

出　　处：《人工晶体学报》2022年第3期485-492,共8页Journal of Synthetic Crystals

基　　金：贵州省大学生创新训练项目(S202010664015);贵州省自然科学基金(20181181)。

摘　　要：本文以咪唑衍生物为配体,通过水热合成法与钴离子制备出两个配位聚合物:{[Co(DTA)(1,4-DIB)(H_(2)O)]·H_(2)O}_(n)(1)和[Co(DTA)(1,3-BMIB)]_(n)(2)(1,4-DIB=1,4-二(1H-咪唑-1-基)苯;1,3-BMIB=1,3-二(4-甲基-1H-咪唑-1-基)苯;H_(2)DTA=2,5-二甲氧基对苯二甲酸)。利用X射线单晶衍射、粉末衍射、热失重、元素分析、红外光谱以及固体紫外-可见光谱等对两个配合物进行了表征。结构分析证实配合物1和2是通过二维结构堆积成的三维超分子化合物。粉末衍射测试则显示两个配合物在水中有很好的稳定性。固体紫外-可见光谱显示两个配合物属半导体材料,对紫外-可见光有很强的吸收作用。在光催化实验中,配合物1和2可加快亚甲基蓝的降解速度。Two cobalt coordination polymers,namely{[Co(DTA)(1,4-DIB)(H_(2)O)]·H_(2)O}_(n)(1)and[Co(DTA)(1,3-BMIB)]_(n)(2)were constructed by 2,5-dimethoxyterephthalic acid(H_(2)DTA),Co(Ⅱ)ions and different imidazole derivatives 1,4-di(1H-imidazol-1-yl)benzene(1,4-DIB)and 1,3-bis(4-methyl-1H-imidazol-1-yl)benzene(1,3-BMIB)under hydrothermal reaction,respectively.Complexes 1 and 2 were characterized by single-crystal X-ray diffraction,powder X-ray diffraction,elemental analysis,thermo-gravimetric analysis and UV-Vis spectra.Single-crystal X-ray diffraction reveals that complexes 1 and 2 are three-dimensional supra molecular frameworks packed by two-dimensional layers.The powder X-ray diffraction confirms that complexes 1 and 2 are stable in water under UV light.The UV-Vis spectra indicate that complexes 1 and 2 are semiconductors with high absorbing ability for UV-Vis light.Photocatalytic tests further confirm the complex 1 and 2 have catalytic activity for the degradation of methylene blue(MB)in water.

关 键 词：钴配位聚合物 三维超分子结构 光催化活性 降解 2 5-二甲氧基对苯二甲酸 咪唑衍生物 

分 类 号：O641.4[理学—物理化学]