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
刘慧荣 1徐昊 2朱敦如 3张俊勇 2宫春华 4谢景力2
作者信息
- 1. 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
- 2. 嘉兴大学生物与化学工程学院,嘉兴 314001
- 3. 南京工业大学化工学院,南京 211816
- 4. 嘉兴南湖学院新材料工程学院,嘉兴 314001
- 折叠
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[HPWⅤ2WⅥ10O40]·2H2O(1)和(EV)2[Mo8O26](2),并解析了其单晶结构,在化合物1和2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.1和2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.
Abstract
Two new viologen-polyoxometalate hybrid crystalline materials:(MV)2[HPWⅤ2WⅥ10O40]·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 deter-mined 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 photochro-mic mechanism of compound 2 has been investigated by solid-state diffuse reflection,electron paramagnetic reso-nance and theoretical calculation.1 and 2 show good catalytic performance in the photocatalytic degradation of sev-eral organic dyes(methylene blue,pararosaniline hydrochloride and rhodamine 6G).CCDC:2252398,1;2252396,2.
关键词
紫精/多酸/光致变色/光催化Key words
viologen/polyoxometalate/photochromism/photocatalysis引用本文复制引用
基金项目
国家自然科学基金(21771088)
浙江省自然科学基金(LY20B010005)
出版年
2024
NETL
NSTL
万方数据