Issue 89, 2017

Light- and heat-triggered reversible luminescent materials based on polysiloxanes with anthracene groups

Abstract

In this study, reversible silicone elastomers were successfully developed by light-triggered dimerization and heat depolymerization of the anthryl groups. Polysiloxanes with anthryl groups were prepared from poly(aminopropylmethylsiloxane) (PAPMS) with electron-donating (9-anthracenylmethyl acrylate) and electron-withdrawing (anthracene-9-carboxylic acid) units. The cross-linking networks were formed with the via 4π–4π photo-cycloadditions of the anthryl groups upon the UV light excitation (365 nm). 9-Anthracenylmethyl acrylate or anthracene-9-carboxylic acid efficiently dimerized through the photodimerization of the anthryl groups in the organic solvents, which was proven by UV-vis spectra, NMR spectra, and LC/MS. The covalent bonds between pendant anthryl groups were cleaved after heating at 120 °C. Furthermore, repeatable dimerization–depolymerization conversion was confirmed. In addition, for the first time, we found that the sunlight can also initiate the cycloaddition, which was “greener” and more environment-friendly. The green luminescence was observed from the PAPMS-1 film instead of the quenching effect caused by aggregation after the cycloaddition. Thus, a colorful UV-light emitting diode (LED) cell was obtained by coating the films on the commercially available LED cell.

Graphical abstract: Light- and heat-triggered reversible luminescent materials based on polysiloxanes with anthracene groups

Supplementary files

Article information

Article type
Paper
Submitted
07 Nov 2017
Accepted
04 Dec 2017
First published
15 Dec 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 56489-56495

Light- and heat-triggered reversible luminescent materials based on polysiloxanes with anthracene groups

D. Han, H. Lu, W. Li, Y. Li and S. Feng, RSC Adv., 2017, 7, 56489 DOI: 10.1039/C7RA12201B

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