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Remarkable solid-state fluorescence change from the visible to the near-infrared region based on the protonation/deprotonation of an AIEgen

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Abstract

The development of stimuli-responsive luminescent compounds featuring high solid-state emission and a long-wavelength fluorescence switch between the visible and the near-infrared (NIR) region is still a challenging task. Here we synthesize an aggregation-induced emission (AIE)-active luminogen DPP3A, which exhibits a fluorescence switch between the visible (λem,max = 652 nm) and the NIR region (λem,max = 800 nm) upon acid/base stimuli, and accessible solid-state NIR emission. NMR spectroscopy, theoretical calculations and powder X-ray diffraction are performed to acquire the mechanisms of acidochromism. The remarkable fluorescence changes on paper and banknotes of DPP3A present its potential as a security ink material with high contrast and easy accessibility that is free of background fluorescence.

Graphical abstract: Remarkable solid-state fluorescence change from the visible to the near-infrared region based on the protonation/deprotonation of an AIEgen

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Article information


Submitted
23 Jul 2020
Accepted
17 Sep 2020
First published
21 Sep 2020

Mater. Chem. Front., 2020, Advance Article
Article type
Research Article

Remarkable solid-state fluorescence change from the visible to the near-infrared region based on the protonation/deprotonation of an AIEgen

Y. Li, X. Wang, L. Zhang, L. Liu, Q. Wang, H. Lu and X. Zhao, Mater. Chem. Front., 2020, Advance Article , DOI: 10.1039/D0QM00527D

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