基于4-氨基-1,2,4-三唑和多金属氧酸盐为杂化配体的CuⅡ和CuⅠ配合物的水热合成及光催化性能

摘要

在水热条件下,制备了2个基于多金属氧酸盐(POM)的CuⅡ和Cu1新型杂化配合物材料,即[Cu2(4-NHrtrz)4(Mo8O26)(H2O)4]5H2O(1)和[Cu4(4-NH2-trz)4Mo8O26] (2)(4-NH2-trz=4-氨基-1,2,4-三唑).通过单晶X射线衍射、傅里叶变换红外光谱和粉末X射线衍射分析确定了它们的结构.在配合物1中,4-氨基-1,2,4-三唑双齿配体连接2个相邻的CuⅡ中心形成双核结构单元,这些双核结构单元进一步通过Mo8O264-连接形成一维(1D)的杂化配位结构.在配合物2中,4-氨基-1,2,4-三唑双齿配体连接相邻Cu1中心构筑了独特的[Cu4(4-NH2-trz)4]n一维螺旋链,这些左手和右手的一维螺旋链再通过(β-Mo8O26)4-连接形成2D杂化骨架.光催化实验研究表明,样品1和样品2对于不同有机染料(亚甲基蓝(MB)、罗丹明B(RhB)和甲基橙(MO))具有很好的光催化降解能力.%Under hydrothermal conditions,two novel polyoxometalate (POM)-based Cu Ⅱ and Cu Ⅰ hybrid materials,namely [Cu2(4-NHrtrz)4(Mo8O26)(H2O)4] ·5H2O (1) and [Cu4(4-NH2-trz)4Mo8O26] (2) (4-NHrtrz=4-amino-1,2,4-triazole)have been designed and synthesized.Their crystal structures have been determined by single crystal X-ray diffraction,FT-IR infrared spectra and powder X-ray diffraction analysis.In 1,bi-dentate 4-NH2-trz ligands bridge two neighboring Cu Ⅱ centers forming dinuclear structural units,which are further linked by Mo8O264-ions and arranged into a one-dimensional (1D) hybrid coordination framework.In 2,bidentate 4-NH2-trz ligands also link neighboring Cu1 centers to generate unique 1D [Cu4(4-NH2-trz)4]n helical chains.Further these infinite righthand and left-hand helical chains are linked by (β-Mo8O26)4-anions to form a 2D hybrid framework.Photocatalytic activities for decomposition of different organic dyes (methylene blue (MB),rhodamine B (RhB) and methyl orange (MO)) have been investigated for 1 and 2,indicating that 1 and 2 are good candidates for the photocatalytic degradation of these organic dyes.CCDC:1554212,1;1473507,2.