Fluorescent litmus film for detecting acid vapors: free-standing and robust AIE sensing film fabricated by photopolymerization of self-assembled hierarchical triphenylamine-based gelators

In response to human damage caused by harmful vapors emitted throughout the industry, the detection of toxic vapors such as acid vapors is urgently required. Recognizing acid vapor leaks is particularly difficult due to their characteristics such as colorlessness, high diffusion coefficient, and hig...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2022-08, Vol.1 (31), p.11316-11322
Main Authors: Yoon, Won-Jin, Yang, Seungchul, Jang, Junhwa, Oh, Mintaek, Rim, Minwoo, Ko, Hyeyoon, Koo, Jahyeon, Lim, Seok-In, Choi, Yu-Jin, Jeong, Kwang-Un
Format: Article
Language:English
Subjects:
Acid resistance
Acids
Chemical sensors
Diffusion coefficient
Fluorescence
Nanofibers
Photopolymerization
Robustness
Self-assembly
Stability
Toxicity
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Summary:In response to human damage caused by harmful vapors emitted throughout the industry, the detection of toxic vapors such as acid vapors is urgently required. Recognizing acid vapor leaks is particularly difficult due to their characteristics such as colorlessness, high diffusion coefficient, and high toxicity. Therefore, there is a great demand for the development of a detection litmus film with excellent resistance to acids as well as visualization of acid vapor leaks with a fast response and recovery rate. To meet these requirements, a programmed fluorophore (TPA-3MA) gelator was newly synthesized by chemically connecting a light-emissive triphenylamine (TPA) core and photopolymerizable methacrylate-functionalized flexible alkyl chains. Fluorescent litmus film with high mechanical stability is fabricated by the gelation of TPA-3MA (2 wt%) in hexyl methacrylate (HMA) monomer solvent and the subsequent photopolymerization. The free-standing and robust litmus film consisting of self-assembled TPA-3MA nanofibers shows excellent acid detection performance with long-term stability. This study may provide a versatile platform for the development of security labels and chemical sensors. Free-standing fluorescent litmus film fabricated by polymerization of aggressive induced emission (AIE) organogel for detecting acid vapors provides the sensing properties for industrial safety.
ISSN:2050-7526
2050-7534
DOI:10.1039/d2tc02066a