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

Yangyang Li; Xian Wang; Lei Zhang; Luqi Liu; Qiusheng Wang; Hongguang Lu; Xiaowei Zhao

doi:10.1039/D0QM00527D

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

Yangyang Li,‡^a Xian Wang,‡^a Lei Zhang,

^bc Luqi Liu,^a Qiusheng Wang,

^a Hongguang Lu

*^a and Xiaowei Zhao*^a

Author affiliations

* Corresponding authors

^a Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P. R. China
E-mail: hglu@tjut.edu.cn, xwzhao@tjut.edu.cn

^b Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling, School of Science, Tianjin Chengjian University, Tianjin 300384, P. R. China

^c College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China

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 (λ_em,max = 652 nm) and the NIR region (λ_em,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.

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DOI: https://doi.org/10.1039/D0QM00527D
Article type: Research Article
Submitted: 23 Jul 2020
Accepted: 17 Sep 2020
First published: 21 Sep 2020

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Mater. Chem. Front., 2020,4, 3378-3383

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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

Y. Li, X. Wang, L. Zhang, L. Liu, Q. Wang, H. Lu and X. Zhao, Mater. Chem. Front., 2020, 4, 3378 DOI: 10.1039/D0QM00527D

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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†

Abstract

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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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