Reversible Emitting Anti-Counterfeiting Ink Prepared by Anthraquinone-Modified β -Cyclodextrin Supramolecular Polymer.

Authors :: Chen L
Chen Y
Fu HG
Liu Y
Source :: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2020 Jun 15; Vol. 7 (14), pp. 2000803. Date of Electronic Publication: 2020 Jun 15 (Print Publication: 2020).
Publication Year :: 2020
Abstract: Intelligent fluorescent materials have been paid more and more attention due to their wide application in information encryption and anti-counterfeiting materials. Herein, a supramolecular polymer is constructed through the host-guest interaction of anthraquinone-modified β -cyclodextrin (AQ- β -CD) in aqueous solution. Thanks to the hydrophobic microenvironment of the cyclodextrin cavity and the shielding effect on oxygen molecules, the anthraquinone group, as the guest molecule, can rapidly produce 9,10-anthracenediol (QH <subscript>2</subscript> ) with strong fluorescence by photoreduction. Interestingly, the generated anthracenediol group is still sensitive to oxygen and can be converted to anthraquinone by oxygen. Significantly, aqueous solution of AQ- β -CD supermolecular polymer is used as emitting ink, which decrypts the information by ultraviolet light and encrypts the information in the air.<br />Competing Interests: The authors declare no conflict of interest.<br /> (© 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.)

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