Affiliation:
1. Center for AIE Research Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518061 China
2. HKUST Shenzhen Research Institute Shenzhen 518057 China
3. School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong Shenzhen Guangdong 518172 China
Abstract
AbstractAmorphous polymers with ultralong room‐temperature phosphorescence (RTP) are highly promising for various applications. Particularly, polymer‐based RTP materials with multiple functions such as color‐tunability or stimulus‐response are highly desirable for multilevel anti‐counterfeiting but are rarely reported. Herein, a facile strategy is presented to achieve a series of polymer‐based RTP materials with ultralong lifetime, multicolor afterglow, and reversible response to UV irradiation by simply embedding pyridine‐substituted triphenylamine derivatives into the polymer matrix poly(vinyl alcohol) (PVA) and poly(methyl methacrylate) (PMMA), respectively. Notably, the pyridine group with the capabilities of promoting intersystem crossing and forming hydrogen‐bonding interactions is essential for triggering ultralong RTP from the doping PVA system, among which the doping film TPA‐2Py@PVA exhibits excellent RTP property with an ultralong lifetime of 798.4 ms and a high quantum yield of 15.2%. By further co‐doping with the commercially available fluorescent dye, multicolor afterglow is obtained via phosphorescence energy transfer. Meanwhile, the doped PMMA system exhibits reversible photoactivated ultralong RTP properties under continuous UV irradiation. Finally, potential applications of these doped PVA and PMMA systems with ultralong lifetime, multicolor afterglow, and photoactivated ultralong RTP in multidimensional anti‐counterfeiting are demonstrated.
Funder
National Natural Science Foundation of China
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
33 articles.
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