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Hiding and appearing of information in a mechanochromic system of 2,5-dicarbazole-substituted terephthalate derivative

Abstract

A 2,5-dicarbazole-substituted terephthalate derivative consisting of two carboxylic acid groups was synthesized in order to investigate the influence of acid and base vapours on its mechanofluorochromic (MFC) behaviors. The UV-vis absorption and emission spectra and quantum chemical calculation indicated molecular push–pull electronic structure and non-planar geometry, which resulted in molecular marked MFC behavior. Under mechanical force, white solid became yellow one, and the cyan fluorescence was converted to yellow-green fluorescence. Solid color and fluorescence could be recovered by solvent or thermal annealing. Thus, a reversible MFC process was observed. When exposed to NH3 vapor, both pristine and ground solids emitted blue fluorescence, and then the fluorescence colors were restored to original cyan and yellow-green by fuming with HCOOH vapor. Therefore, as a multiple stimuli-responsive material, the molecule as smart material may be applied in data protection. The information written by force can be hidden by NH3 vapor, appeared by HCOOH, and then erased by thermal annealing

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Publication details

The article was received on 22 Mar 2018, accepted on 16 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8TC01379A
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Hiding and appearing of information in a mechanochromic system of 2,5-dicarbazole-substituted terephthalate derivative

    P. C. Xue, Z. Yang and P. Chen, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01379A

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