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：刘慧荣 徐昊 朱敦如 张俊勇 宫春华 谢景力 LIU Huirong;XU Hao;ZHU Dunru;ZHANG Junyong;GONG Chunhua;XIE Jingli(College of Chemical Engineering,Nanjing Tech University,Nanjing 211816,China;College of Biological,Chemical Sciences,and Engineering,Jiaxing University,Jiaxing,Zhejiang 314001,China;School of Advanced Materials and Engineering,Jiaxing Nanhu University,Jiaxing,Zhejiang 314001,China)

机构地区：[1]南京工业大学化工学院,南京211816 [2]嘉兴大学生物与化学工程学院,嘉兴314001 [3]嘉兴南湖学院新材料工程学院,嘉兴314001

出　　处：《无机化学学报》2024年第7期1368-1376,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21771088);浙江省自然科学基金(No.LY20B010005)资助。

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)[HPW^(Ⅴ)_(2)WⅥ_(10)O_(40)]·2H_(2)O(1)和(EV)_(2)[Mo_(8)O_(26)](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。Two new viologen-polyoxometalate hybrid crystalline materials:(MV)_(2)[HPW~Ⅴ_(2)W~Ⅵ_(10)O_(40)]·2H_(2)O(1)and(EV)_(2)[Mo_8O_(26)](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).CCDC:2252398,1;2252396,2.

关 键 词：紫精 多酸 光致变色 光催化 

分 类 号：O614.613[理学—无机化学] O614.612[理学—化学]