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Position matters : fluorescent positional isomers for reversible multichannel encryption devices

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Liu,  Yuxin
Felix Löffler, Biomolekulare Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Seeberger,  Peter H.
Peter H. Seeberger - Automated Systems, Biomolekulare Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Löffler,  Felix F.
Felix Löffler, Biomolekulare Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Liu, Y., Seeberger, P. H., Merbouh, N., & Löffler, F. F. (2021). Position matters: fluorescent positional isomers for reversible multichannel encryption devices. Chemistry – A European Journal, 27(65), 16098-16102. doi:10.1002/chem.202103441.


Cite as: http://hdl.handle.net/21.11116/0000-0009-625A-4
Abstract
Fluorescence signals have been widely used in information encryption for a few decades, but still suffer from limited reliability. Here, reversible multichannel fluorescent devices with encrypted information were constructed, based on two fluorescent positional isomers of a diphenylquinoxaline derivative. Possessing the same core fluorescent group and acid-/pH-responsive mechanism, the two isomers showed different fluorescence color in an acidic environment, which allowed us to realize stepwise encryption of information in orthogonal fluorescence channels. Since the protonation was reversible, the revealed information could be re-encrypted, simply by heating. This approach highlights the value of positional isomers to build multichannel encryption devices, improving their reliability on the molecular level.