Abstract

In this work, under hydrothermal conditions, two novel polyoxometalates (POMs)-based Cu^II and Cu^I hybrid materials with 2,6-(1,2,4-triazole-4-yl)pyridine (L₁), namely yellow block crystals [Cu₂(L₁)₂(Mo₄O₁₃)] (1) and blue block crystals [Cu₂(L₁)₃(H₂O)₂(Mo₄O₁₃)₂] (2) have been designed and synthesized. These POM-based Cu^II and Cu^I hybrid materials 1–2 have been determined by single crystal X-ray diffraction analyses. In 1, these Mo₈O₂₆⁴⁻ anions and Cu^I centers are inter-linked by bidentate L₁, which are arranged into the 1 D POMs-based Cu^I hybrid metal-organic framework. In 2, these L₁ ligands bridge neighboring Cu^II centers and Mo₈O₂₆⁴⁻ anions, which ultimately form the unique 3 D POM-based Cu^II hybrid coordination framework of 2. Photocatalytic activities for decomposition of different organic dyes (Rhodamine B (RhB), methylene blue (MB) and methyl orange (MO)) have been investigated for 2, indicating that 2 are good candidates for the photocatalytic degradation of these organic dyes. 

摘要

在这项工作中，在水热条件下，两种新型的基于多金属氧酸盐（POMs）的Cu ^II和Cu ^I杂化材料与2,6-（1,2,4-三唑-4-基）吡啶（L ₁），即黄色嵌段晶体[Cu ₂（L ₁）₂（Mo ₄ O ₁₃）]（1）和蓝块晶体[Cu ₂（L ₁）₃（H ₂ O）₂（Mo ₄ O ₁₃）₂ ]（2）设计和合成。这些基于POM的Cu ^II和Cu ^I杂化材料1 - 2已经通过单晶X射线衍射分析来确定。在1中，这些Mo ₈ O ₂₆ ^4-阴离子和Cu ^I中心通过双齿L ₁相互连接，双齿L ₁被安排在基于1 D POMs的Cu ^I杂化金属有机框架中。在2中，这些L ₁配体桥接相邻的Cu ^II中心和Mo ₈ O ₂₆ ^4-阴离子，最终形成了独特的基于3 D POM的Cu ^II杂化配位骨架2。已研究了2种分解不同有机染料（若丹明B（RhB），亚甲基蓝（MB）和甲基橙（MO））的光催化活性，表明2是这些有机染料的光催化降解的良好候选者。