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...

Full description

Saved in:
Bibliographic Details
Published inAngewandte Chemie International Edition Vol. 60; no. 44; pp. 23842 - 23848
Main Authors Li, Yiran, Baryshnikov, Glib V., Xu, Chenggang, Ågren, Hans, Zhu, Liangliang, Yi, Tao, Zhao, Yanli, Wu, Hongwei
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 25.10.2021
EditionInternational ed. in English
Subjects
anti-counterfeiting
Benzene
Bonding strength
Carbonyl compounds
Carbonyls
coassembly
Emission
Fluorescence
Free radicals
Functional groups
Hydrogen bonding
Hydrogen bonds
Information processing
Irradiation
light emission
Light irradiation
photoirradiation
Polyvinyl alcohol
Radiation
radical luminescence
Substitutes
anti-counterfeiting
light emission
coassembly
photoirradiation
radical luminescence
Online AccessGet full text

Cover

More Information
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. Coassembly systems are formed by doping carbonyl compounds into polyvinyl alcohol. After light irradiation the hydrogen‐bonding network stabilizes the free radicals generated for the carbonyl compounds, leading to strong free‐radical emission. Light/heat‐controlled information encryption using these systems is demonstrated.
Bibliography:These authors contributed equally to this work.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202110405