Multi‐Functional Integration of Phosphor, Initiator, and Crosslinker for the Photo‐Polymerization of Flexible Phosphorescent Polymer Gels

A general approach to constructing room temperature phosphorescence (RTP) materials involves the incorporation of a phosphorescent emitter into a rigid host or polymers with high glass transition temperature. However, these materials often suffer from poor processability and suboptimal mechanical pr...

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Bibliographic Details
Published in:Angewandte Chemie 2024-04, Vol.136 (18), p.n/a
Main Authors: Cao, Yanyan, Wang, Dan, Zhang, Yongfeng, Li, Gengchen, Gao, Chong, Li, Wei, Chen, Xiaoting, Chen, Xiaofei, Sun, Peng, Dong, Yuping, Cai, Zhengxu, He, Zhiyuan
Format: Article
Language:English
Subjects:
Aerogels
Bioengineering
Colorimetry
Crosslinking
Emitters
Excitons
Flexible phosphorescence gels
Fluorescence
Freezing
Functional integration
Gels
Glass transition temperature
Hydrogels
Ice formation
Ice-confined phosphorescence enhance
In situ visualization
Mechanical properties
Medical imaging
Microfluidics
Organic photoinitiators
Organic room-temperature phosphorescence
Phosphorescence
Phosphors
Photoinitiators
Polymer gels
Polymerization
Polymers
Recoverability
Roller coating
Room temperature
Shearing
Stretchability
Transition temperatures
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Summary:A general approach to constructing room temperature phosphorescence (RTP) materials involves the incorporation of a phosphorescent emitter into a rigid host or polymers with high glass transition temperature. However, these materials often suffer from poor processability and suboptimal mechanical properties, limiting their practical applications. In this work, we developed benzothiadiazole‐based dialkene (BTD‐HEA), a multifunctional phosphorescent emitter with a remarkable yield of intersystem crossing (ΦISC, 99.83 %). Its high triplet exciton generation ability and dialkene structure enable BTD‐HEA to act as a photoinitiator and crosslinker, efficiently initiating the polymerization of various monomers within 120 seconds. A range of flexible phosphorescence gels, including hydrogels, organogels, ionogels, and aerogels were fabricated, which exhibit outstanding stretchability and recoverability. Furthermore, the unique fluorescent‐phosphorescent colorimetric properties of the gels provide a more sensitive method for the visual determination of the polymerization process. Notably, the phosphorescent emission intensity of the hydrogel can be increased by the formation of ice, allowing for the precise detection of hydrogel freezing. The versatility of this emitter paves the way for fabricating various flexible phosphorescence gels with diverse morphologies using microfluidics, film‐shearing, roll coating process, and two/three‐dimensional printing, showcasing its potential applications in the fields of bioimaging and bioengineering. A multifunctional phosphorescence molecule, benzothiadiazole‐based dialkene (BTD‐HEA), has been developed, serving as both photo‐initiator and crosslinker. It facilitates the rapid polymerization of various acrylate‐based monomers into flexible phosphorescent gels within 120 s, while enabling real‐time in situ monitoring. The versatility of BTD‐HEA underscores its potential applications in the fields of bioimaging and wearable optoelectronics.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.202401331