4,4′-二(1-咪唑基)苯硫醚构筑的钴配合物:合成、晶体结构及对有机染料降解性能研究

A Cobalt Complex Assembled with 4,4′-bis(imidazol-l-yl)diphenyl Thioether:Synthesis,Crystal Structure and Photocatalysis

采用水热法,用4,4′-二(1-咪唑基)苯硫醚(BIDPT)和均苯三甲酸(H3btc)与Co(NO3)2·6H2O反应,合成了一个基于三核钴单元的一维链配合物{[Co3(BIDPT)4(btc)2(H2O)2]·H2O}n(1)。X单晶射线分析表明,配合物是为单斜晶系,Pc空间群,分子质量Mr=4264.21(8),a=1.0193(3)nm,b=1.7830(5)nm,c=2.3646(6)nm,β=102.45°,V=4.1962(2)nm3,Z=2,Dc=2.300 g/cm3,F(000)=2814,S=1.042,R1=0.0560,wR2=0.1842(I>2σ(I))。配合物1中,质子化的均苯三甲酸链接Co(1)和Co(3)形成了两条一维链。而这两条一维链与Co(2)和BIDPT构成的“8”字构型相连,形成了另外一条一维链。配合物中存在C-H…π堆积作用使一维链连接形成二维超分子结构。另外对配合物红外、元素分析、热稳定性以进行了测试。研究了配合物1对藏红T的催化降解性能,在氙灯照射和H2O2存在的条件下,配合物1对藏红T具有较好的光催化降解作用。

A new coordination compound{[Co3(BIDPT)4(btc)2(H2O)2]·H2O}n(1)(BIDPT=4,4′-bis(imidazol-l-yl)diphenyl thioether,H3btc=1,3,5-benzenetricarboxylic acid)was prepared by hydrothermal method and characterized by IR,elemental analysis and TGA.Single-crystal X-ray diffraction analysis revealed that the compound crystalline was in triclinic crystal system,space group Pc with Mr=4264.21(8),a=1.0193(3)nm,b=1.7830(5)nm,c=2.3646(6)nm,β=102.45°,V=4.1962(2)nm3,Z=2,Dc=2.300 g·cm-3,F(000)=2814,R1=0.0560,wR2=0.1842(I>2σ(I)).In compound 1,protonated H3btc ligands bridge neighboring Co(1)and Co(3)ions formed two one-dimensional chains,separately.And the chains are connected by a“8”configuration,which are formed by Co(2)and BIDPT.The one-dimensional chains of complex 1 are developed into two-dimensional structure by C-H…πinteraction.1 has good photocatalytic degradation of safranin T with Xe lamp irradiation and in the presence of hydrrogen peroxide.