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Tricolor fluorescence switching in a single component mechanochromic molecular material

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Abstract

The present work explores a rational molecular design for a multicolor switchable mechanochromic molecular system with a high fluorescence quantum yield ΦF. It is demonstrated that the reversible and high-contrast tricolor luminescence switching can be induced by combining the crystal-to-amorphous transition and unique crystal-to-crystal transition of a polymorphic α-dicyanodistyrylbenzene (α-DCS) unit. To this end, we have synthesized a luminescent molecule comprising an α-DCS core flanked with long dodecyloxy chains (DDDCS). DDDCS shows blue (B) and orange (O) fluorescent crystalline states and a green (G) fluorescent amorphous state. Very specifically, applying a shear force to the solid sample directs a fluorescence switching to the G state, while thermal annealing and solvent vapor annealing direct it to the B and O states, respectively.

Graphical abstract: Tricolor fluorescence switching in a single component mechanochromic molecular material

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Supplementary files

Article information


Submitted
28 Feb 2020
Accepted
23 Apr 2020
First published
24 Apr 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Tricolor fluorescence switching in a single component mechanochromic molecular material

H. Kim, J. Gierschner and S. Y. Park, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC01032D

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