Photoinduced radical emission in a coassembly system

Photoinduced radical emission in a coassembly system

Developing radical emission at ambient conditions is a challenging task since radical species are unstable in air. In the present work, we overcome this challenge by coassembling a series of tricarbonyl-substituted benzene molecules with polyvinyl alcohol (PVA). The strong hydrogen bonds between the...

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Bibliographic Details
Main Authors: Li, Yiran, Baryshnikov, Glib V., Xu, Chenggang, Ågren, Hans, Zhu, Liangliang, Yi, Tao, Zhao, Yanli, Wu, Hongwei
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2022
Subjects:
Science::Chemistry
Anti-Counterfeiting
Radical Luminescence
Online Access:https://hdl.handle.net/10356/163138
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Institution: Nanyang Technological University
Language: English
Description
Summary:Developing radical emission at ambient conditions is a challenging task since radical species are unstable in air. In the present work, we overcome this challenge by coassembling a series of tricarbonyl-substituted benzene molecules with polyvinyl alcohol (PVA). The strong hydrogen bonds between the guest dopants and the PVA host matrix protect the free radicals of carbonyl compounds after light irradiation, leading to strong solid state free radical emission. Changing temperature and peripheral functional groups of the tricarbonyl-substituted benzenes can influence the intensity of the radical emission. Quantum-chemical calculations predict that such free radical fluorescence originates from anti-Kasha D2 →D0 vertical emission by the anion radicals. The photoinduced radical emission by the tricarbonyl-substituted benzenes was successfully utilized for information encryption application.

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