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Metal ions-triggered photo-induced fluorescence change in rhodamine B-based photo-responsive complexes.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy ( IF 4.3 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.saa.2020.118069
Yuanyuan Li 1 , Zining Feng 1 , Yajing Li 1 , Wenhui Jin 1 , Qiuchen Peng 2 , Panke Zhang 2 , Juan He 1 , Kai Li 2
Affiliation  

Photo-responsive materials with tunable properties by multiple stimuli have been widely used as molecular machines, molecular logic gates, optical data storages, etc. In this work, we report a rhodamine B-based photo-responsive system, whose properties could be facilely modulated by metal ions (Zn(II), Ni(II) and Hg(II)). These metal ions endow the complexes (L-Zn, L-Ni and L-Hg) with similar photochromic property but distinctly different photo-induced fluorescence change. Upon UV light irradiation, the spirolactam ring in rhodamine B moiety turned from a close form to an open form, along with enlarged conjugated structure with intense absorbance. Interestingly, fluorescence "turn off", "no change" and "turn on" responses were induced by Zn(II), Ni(II) and Hg(II) respectively upon UV light irradiation. Taking advantage of the prominently different characteristics caused by metal ions, different logic gates were designed by simply varying the inputs of metal ions and UV light. This work provided a new strategy for developing multifunctional photo-responsive materials, which were further beneficial for constructing photo-controlled logic gates with tunable performance.

中文翻译:

金属离子触发的基于若丹明B的光敏复合物中的光诱导荧光变化。

具有多种刺激特性的光敏材料已被广泛用作分子机器,分子逻辑门,光学数据存储等。在这项工作中,我们报道了基于罗丹明B的光敏系统,其性质可以方便地调节。金属离子(Zn(II),Ni(II)和Hg(II))。这些金属离子使配合物(L-Zn,L-Ni和L-Hg)具有相似的光致变色特性,但光诱导的荧光变化却明显不同。在紫外光照射下,若丹明B部分中的螺内酰胺环从紧密形式变为开放形式,以及具有强吸收性的扩大的共轭结构。有趣的是,在紫外线照射下,Zn(II),Ni(II)和Hg(II)分别诱导了荧光的“关闭”,“无变化”和“开启”响应。利用由金属离子引起的显着不同的特性,通过简单地改变金属离子和紫外线的输入来设计不同的逻辑门。这项工作为开发多功能光响应材料提供了新的策略,这对于构建具有可调性能的光控逻辑门将进一步有益。
更新日期:2020-01-13
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