基于紫精组分构筑的三种光致变色共晶体  

Three Photochromic Co-crystals Based on Viologen Moiety

作　　者：刘进剑 刘娜[2] 陆艺炜 赵国政 LIU Jin-Jian;LIU Na;LU Yi-Wei;ZHAO Guo-Zheng(Modern College of Humanities and Science,Shanxi Normal University,Linfen,Shanxi 041000,China;School of Chemistry and Material Science,Shanxi Normal University,Linfen,Shanxi 041004,China)

机构地区：[1]山西师范大学现代文理学院,临汾041000 [2]山西师范大学化学与材料科学学院,临汾041004

出　　处：《无机化学学报》2021年第5期937-944,共8页Chinese Journal of Inorganic Chemistry

基　　金：山西师范大学现代文理学院基础研究项目(No.2020JCYJ03);山西师范大学研究生科技创新项目(No.2020XSY029)资助;山西省高等学校科技成果转化培育项目(No.2020CG032)。

摘　　要：在碱性条件下,将1,2,4,5-均苯四甲酸(H4BTEC)与过渡金属离子配位,并引入中性紫精组分1-羧乙基-4,4′-联吡啶(CEbpy),构筑了3个同构共晶体[M(H_(2)O)_5(BTEC)_(0.5)]·(CEbpy)(M=Mn(1)、Zn(2)、Co(3))。在紫外灯照射下,3个化合物都发生明显的光致变色现象,这归因于光诱导的电子转移并产生了紫精自由基。同时,在加热的情况下,化合物3还表现出不可逆的失水致变色行为,而化合物1和2则没有。我们讨论了金属离子对变色行为的影响。The reactions of 1,2,4,5-benzenetetracarboxylic acid(H_(4)BTEC)with the transition metal ions in the presence of neutral viologen moiety,1-carboxyethyl-4,4’-bipyridine(CEbpy),led to three isostructural co-crystals[M(H_(2)O)_(5)(BTEC)_(0.5)]·(CEbpy)(M=Mn(1),Zn(2),Co(3))in an alkaline environment.Upon UV irradiation,these three compounds exhibited obvious photochromic behaviors owing to the formation of viologen radicals through photo-induced electron transfer.Meanwhile,compound 3 exhibited irreversible hydrochromic behavior upon heating,while compounds 1 and 2 did not.The influence of metal ions on their chromic behaviors has been discussed.CCDC:1953749,1;1954911,2;2032783,3.

关 键 词：1-羧乙基-4 4′-联吡啶(CEbpy) 共晶 光致变色 失水致变色 

分 类 号：O614.711[理学—无机化学] O614.241[理学—化学]