Readily accessible rhodamine B-based photoresponsive material  

作　　者：LI Kai XIANG Yu TONG AiJun TANG Ben Zhong 

机构地区：[1]Beijing Key Laboratory Microanalytical Methods and Instrumentation [2]Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology,Ministry of Education [3]Department of Chemistry,Tsinghua University [4]Department of Chemistry,Institute of Molecular Functional Materials,State Key Laboratory of Molecular Neuroscience,The Hong Kong University of Science & Technology

出　　处：《Science China Chemistry》2014年第2期248-251,共4页中国科学（化学英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21175079 and 21375074)

摘　　要：A photochromic rhodamine B-based material containing Cd（Ⅱ） as bridge was facilely prepared. The 4-methoxylsalicylalde hyde rhodamine B bydrazone Cd（Ⅱ） complex displayed unusual ring-open response upon 365 nm UV irradiation, exhibiting long photochromic lifetime and good fatigue resistance. The UV-induced ring-open of the complex led to a distinct color and fluorescence change in acetonitrile. A new mechanism was put forward： salicylaldehyde part in the complex underwent UV-promoted isomerization from enol-form to keto-form, enhancing the chelation of Cd（Ⅱ） and yielding the ring-opening rhodamine B part. Compared to other reported photochromic systems, this new photochromic material offered attractive new insights into the development of low cost photochromic materials with good performance.A photochromic rhodamine B-based material containing Cd(Ⅱ)as bridge was facilely prepared.The 4-methoxylsalicylaldehyde rhodamine B hydrazone Cd(Ⅱ)complex displayed unusual ring-open response upon 365 nm UV irradiation,exhibiting long photochromic lifetime and good fatigue resistance.The UV-induced ring-open of the complex led to a distinct color and fluorescence change in acetonitrile.A new mechanism was put forward:salicylaldehyde part in the complex underwent UV-promoted isomerization from enol-form to keto-form,enhancing the chelation of Cd(Ⅱ)and yielding the ring-opening rhodamine B part.Compared to other reported photochromic systems,this new photochromic material offered attractive new insights into the development of low cost photochromic materials with good performance.

关 键 词：PHOTOCHROMISM coordination compound rhodamine B salicylaldehyde hydrazone CADMIUM UV-LIGHT 

分 类 号：TB34[一般工业技术—材料科学与工程]