Writing and erasing multicolored information in diarylethene-based supramolecular gels
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Chien-Wei Hsu1, Claire Sauvée1, Henrik Sundén1
1Chalmers University of Technology , Department of Chemistry and Chemical Engineering , Chemistry and Biochemistyry , Kemivägen 10 , 412 96 , Göteborg , Sweden . Email: sundenh@chalmers.se ;
Abstract:
A facile cocktail approach implying the mixing of diarylethene (DAE) photoswitches and low molecular weight gelators (LMWG) is presented. The photoresponsive gels exhibit multicolored emission that can be precisely controlled by different light exposure schemes (wavelength and dose), applicable for fluorescence patterning/writing. Including also a blue-emitting fluorophore allows for tri-chromatic color tuning of the emission via multistep energy transfer reactions, which in turn yields a non-linear response between the emission spectra and the light dose. This feature is highly desired in data security and anti-counterfeiting contexts. The information written in the gels can be conveniently erased by light, mass diffusion, or shaking; the latter being due to the thixotropic properties of the gels.
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