Self-Assembly-Triggered Cis-to-Trans Conversion of Azobenzene Compounds.
Self-Assembly-Triggered Cis-to-Trans Conversion of Azobenzene Compounds.
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DOI：
10.1021/acs.jpclett.7b03060
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
Zheng Wu;Rongrong Xue;Mengqi Xie;Xuejiao Wang;Zihao Liu;M. Drechsler;Jianbin Huang;Yun Yan
中科院分区：
文献类型：
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作者：
Zheng Wu;Rongrong Xue;Mengqi Xie;Xuejiao Wang;Zihao Liu;M. Drechsler;Jianbin Huang;Yun Yan
偶氮苯化合物的顺式-反式过渡通常发生在适当的光照射或缓慢的热弛豫下，由于反式和顺式异构体的n-π*跃迁重叠，偶氮化合物很难得到完全的顺式-反式过渡。我们发现，通过将光稳态视为顺式和反式异构体之间的化学平衡，触发反式异构体的自组装可以促进顺式到反式的转变，并且使用优雅设计的配位偶氮甚至可以实现具有光谱级纯度的反式偶氮。这项工作为操纵偶氮化合物的顺式到反式转变建立了一个新的范例，这可能会启发各种偶氮基先进材料的设计。
Cis-to-trans transition of azobenzene compounds usually occurs under appropriate light irradiation or slow thermal relaxation, and one can hardly obtain complete cis-to-trans transition of azos due to the overlap of the n-π* transition of the trans and the cis isomers. We show that by viewing the photostationary state as a chemical equilibrium between the cis and trans isomers, triggered self-assembly of the trans isomers can promote the cis-to-trans transition, and trans azos with spectrum-grade purity can even be achieved using an elegantly designed coordinating azo. This work establishes a new paradigm for manipulating the cis-to-trans transition of azo compounds, which may inspire designs for various azo-based advanced materials.