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 |
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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(H2O)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。 |
关键词: 1-羧乙基-4,4'-联吡啶(CEbpy) 共晶 光致变色 失水致变色 |
基金项目: 山西师范大学现代文理学院基础研究项目(No.2020JCYJ03)、山西省高等学校科技成果转化培育项目(No.2020CG032)和山西师范大学研究生科技创新项目(No.2020XSY029)资助。 |
Abstract: The reactions of 1,2,4,5-benzenetetracarboxylic acid (H4BTEC) 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(H2O)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. |
Keywords: 1-carboxyethyl-4,4'-bipyridine (CEbpy) co-crystals photochromism hydrochromism |
投稿时间:2020-11-25 修订日期:2021-01-05 |
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刘进剑,刘娜,陆艺炜,赵国政.基于紫精组分构筑的三种光致变色共晶体[J].无机化学学报,2021,37(5):937-944. |
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Support information: 相关附件: file200537_Supporting_Information.docx |
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