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首页> 外文期刊>Journal of Applied Polymer Science >Ultraviolet-visible/fluorescence behaviors of a spiropyran/polydimethylsiloxane composite film under acid vapors
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Ultraviolet-visible/fluorescence behaviors of a spiropyran/polydimethylsiloxane composite film under acid vapors

机译：Ultraviolet-visible/fluorescence behaviors of a spiropyran/polydimethylsiloxane composite film under acid vapors

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摘要

A spiropyran (SP)/polydimethylsiloxane (PDMS) composite film was prepared in this study, and its ultraviolet-visible/fluorescence behaviors under acid vapors were investigated. With UV irradiation, the ring-closed SP in the PDMS matrix transformed to a ring-opened merocyanine, which contained phenolate oxygen and could be further protonated by the hydrogen offered by the acid vapor. Such a protonation process endowed the composite film with not only an obvious color change from purple to yellow but also a strong fluorescent emission. As a result, some common volatile acids, hydrochloric acid, hydrofluoric acid, nitric acid, trifluoroacetic acid, formic acid, acetic acid, and propionic acid, could be distinguished with this method either via color or fluorescent emission. Meanwhile, the film showed good recyclability during the processes of irradiation and protonation. The method, therefore, displayed good processing in real time and was fast and recyclable; this makes it suitable as an alternative for applications related to environmental and safety monitoring of acid vapors. (C) 2017 Wiley Periodicals, Inc.

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