Twisted Phosphors that Violate Kasha's Exciton Model in Organic Systems

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外文摘要：Kasha's exciton model proposes that T1 energy levels of organic compounds are insensitive to molecular aggregation and microenviron-ment change because of negligible small transition dipole moments ofTistates.This model holds true in most organic systems till now.Here we report the fabrication of twisted organic phosphors with intramolecular charge transfer characters and flexible molecular struc-tures.When doped into different organic matrices,the twisted phosphor adopts different conformation,exhibits distinct phosphores-cence colors and T1 energy levels,which violates Kasha's exciton model in organic system.Given that the change of phosphorescence col-ors and maxima can be readily distinguished by human eyes and conventional instrument,the twisted phosphors would be exploited as a new type of molecular probe,which would exhibit potential application in optical sensing and stimuli-responsive systems.

外文关键词：

AfterglowTwisted phosphorTriplet excited stateRoom-temperature phosphorescenceLuminescenceSpin-orbit coupling

作者：

Boyi Fu、Guangming Wang、Jiuyang Li、Junbo Li、Xun Li、Xiaoya Zhao、Shuhui Ding、Guoping Yan、Qianqian Yan、Kaka Zhang

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作者单位：

School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan,Hubei 430205,China

Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules,Shanghai Institute of Organic Chemistry,University of Chinese Academy of Sciences,Chinese Academy of Sciences,345 Lingling Road,Shanghai 200032,China

基金：

National Natural Science Foundation of ChinaShanghai Scientific and Technological Innovation ProjectShanghai Scientific and Technological Innovation ProjectHundred Talents Program from Shanghai Institute of Organic ChemistryPioneer Hundred Talents Program of Chinese Academy of SciencesNingbo Natural Science Foundation

项目编号：

2217519420QA141160020ZR1469200Y121078E3200212023J243

出版年：

2024

DOI：

10.1002/cjoc.202300705

中国化学(英文版)

中国化学会上海有机化学研究所

中国化学(英文版)

CSTPCD

影响因子：0.848

ISSN：1001-604X

年,卷(期)：2024.42(11)