Quinoline-containing diarylethenes: Bridging between turn-on fluorescence, RGB switching and room temperature phosphorescence

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Abstract

Simple structural modifications using oxidation and methylation of a quinoline-containing diarylethene result in dramatic variation of photophysical properties. Turn-on fluorescence, room temperature phosphorescence (RTP) and red-green-blue (RGB) switching were achieved in three different related compounds. Photoswitchable diarylethenes (DAEs) that exhibit turn-on fluorescence are in high demand for super-resolution microscopy, and the development of purely organic phosphorescent materials in the amorphous state is attractive but challenging. The findings reported here provide a novel toolkit for designing turn-on fluorescence DAEs for super-resolution microscopy and extending the scope of amorphous RTP materials. More importantly, we bridge between these two fundamentally significant photochemical and photophysical phenomena, and reveal structure-property relationships between DAE photochromism and RTP.

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Xu, Z., Liu, Q. T., Wang, X., Liu, Q., Hean, D., Chou, K. C., & Wolf, M. O. (2020). Quinoline-containing diarylethenes: Bridging between turn-on fluorescence, RGB switching and room temperature phosphorescence. Chemical Science, 11(10), 2729–2734. https://doi.org/10.1039/c9sc05697a

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