Recent advances in Z/E-isomers of tetraphenylethene derivatives: AIE mechanism, photophysical property, chemical probe, and stereoselectivity syntheses.

Authors:
Zhen Li
Zhen Li
Ghent University
Gent | Belgium

Chem Asian J 2019 Apr 17. Epub 2019 Apr 17.

Wuhan University, Department of Chemistry, Luojia Hill, 430072, Wuhan, CHINA.

The focus research on Z/E-isomers of tetraphenylethene (TPE) derivatives were scare in comparison with thousands of AIEgens based on TPE moiety. The similar chemical and physical properties made them difficult to be separated by conventional purification operation of silica gel column chromatography. However, the Z/E-TPE isomers can be isolated by the introduction of polarity groups, and pure isomers showed unique values in deciphering the AIE mechanism and exhibited very different photophysical, mechanochromism, host-guest coordinate properties. Herein, firstly, the mechanism dispute on AIE was displayed between the restriction of intramolecular vibration and photoinduced Z/E-isomerization. Then, the development of Z/E-TPE derivatives, host-guest detection, and mechanoluminescence properties were reviewed with focusing on their photophysical characters. Finally, the stereoselectivity syntheses of pure Z/E-TPE derivatives was explored.

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Source
http://dx.doi.org/10.1002/asia.201900282DOI Listing
April 2019

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