Issue 12, 2023

Multiplexed stimuli-responsive molecules for high-security anti-counterfeiting applications

Abstract

In the context of society's increasing reliance on information, improving the level of data security is not only a key task but also a formidable challenge. As such it is necessary and urgent to develop advanced technologies for high-security information encryption. Herein, we efficiently synthesized a novel indole dimer, which displayed multiple stimuli-driven, chromotropic capabilities. When triggered by acid/base, the color changes rapidly, accompanied by reversible changes in fluorescence. Interestingly, the color changes of the indole dimer were orthogonal to those of the traditionally utilized stimuli-responsive spiropyran. In combination, this allowed the preparation of invisible inks for printing, with security of information encrypted based on their diametrically opposed response to thermal and acid/base stimulation. The newly synthesized stimuli-responsive indole-dimer and the novel strategy of its application, in combination with the traditional stimuli-responsive spiropyran, provides a new direction in allowing high-level information security against forgery.

Graphical abstract: Multiplexed stimuli-responsive molecules for high-security anti-counterfeiting applications

Supplementary files

Article information

Article type
Paper
Submitted
19 Dec 2022
Accepted
23 Feb 2023
First published
24 Feb 2023

J. Mater. Chem. C, 2023,11, 4164-4170

Multiplexed stimuli-responsive molecules for high-security anti-counterfeiting applications

H. Xia, T. Loan, M. Santra, K. Xie and M. Bradley, J. Mater. Chem. C, 2023, 11, 4164 DOI: 10.1039/D2TC05404C

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