两个紫精-多酸杂化材料的合成、结构及其光致变色和光催化性质
Syntheses, structures, photochromic and photocatalytic properties of two viologen-polyoxometalate hybrid materials
作者单位E-mail
刘慧荣 南京工业大学化工学院, 南京 211816
嘉兴大学生物与化学工程学院, 嘉兴 314001 
 
徐昊 嘉兴大学生物与化学工程学院, 嘉兴 314001  
朱敦如 南京工业大学化工学院, 南京 211816 zhudr@njtech.edu.cn 
张俊勇 嘉兴大学生物与化学工程学院, 嘉兴 314001  
宫春华 嘉兴南湖学院新材料工程学院, 嘉兴 314001 gongch@jxnhu.edu.cn 
谢景力 嘉兴大学生物与化学工程学院, 嘉兴 314001 jlxie@mail.zjxu.edu.cn 
摘要: 分别利用1,1'-二甲基-4,4'-联吡啶(甲基紫精,MV)二氯化物和1,1'-二乙基-4,4'-联吡啶(乙基紫精,EV)二溴化物的阳离子作为电子受体,富电子的杂多酸阴离子作为电子给体,合成了 2 个新的紫精-多酸杂化晶态材料:(MV)2[HPW2W10O40]·2H2O (1)和(EV)2[Mo8O26] (2),并解析了其单晶结构,在化合物 12中,阴、阳离子间均存在氢键相互作用。2具有光致变色性能,光响应时间为1 min以内。通过固体漫反射、电子顺磁共振和理论计算等手段,探究了2的光致变色机理。12对光降解有机染料(亚甲蓝、盐酸副玫瑰苯胺和罗丹明6G)均具有一定的催化性能。
关键词: 紫精  多酸  光致变色  光催化
基金项目: 国家自然科学基金(No.21771088)和浙江省自然科学基金(No.LY20B010005)资助。
Abstract: Two new viologen-polyoxometalate hybrid crystalline materials: (MV)2[HPW2W10O40] ·2H2O (1) and (EV)2[Mo8O26] (2) have been synthesized by using the cations of 1,1'-dimethyl-4,4'-bipyridinium dichloride (methyl viologen, MV) and 1,1'-diethyl-4,4'-bipyridinium dibromide (ethyl viologen, EV) as the electron acceptors, and the electron-rich polyoxometalate anions as the electron donors. The structures of compounds 1 and 2 have been determined by single-crystal X-ray crystallography. Hydrogen bond interactions exist between the cations and the anions in 1 and 2. Interestingly, 2 has a photochromic performance with a light response time within 1 min. The photochromic mechanism of compound 2 has been investigated by solid-state diffuse reflection, electron paramagnetic resonance and theoretical calculation. 1 and 2 show good catalytic performance in the photocatalytic degradation of several organic dyes (methylene blue, pararosaniline hydrochloride and rhodamine 6G).
Keywords: viologen  polyoxometalate  photochromism  photocatalysis
投稿时间:2024-02-27 修订日期:2024-05-27
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刘慧荣,徐昊,朱敦如,张俊勇,宫春华,谢景力.两个紫精-多酸杂化材料的合成、结构及其光致变色和光催化性质[J].无机化学学报,2024,40(7):1368-1376.
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