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Peer reviewed
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Chen, Shanshan; Yin, Liying; Liu, Lin; Zhang, Ning; Dong, Dewen
Chinese chemical letters, 10/2021, Volume: 32, Issue: 10Journal Article
We have developed a model design for facile fabrication of multicolor (including white light) fluorescent dual-polymer hydrogels by tuning the stoichiometry of metal ions. The hydrogels exhibit high mechanical strength and reversible acidity/alkalinity stimuli-responsive properties, which can further lead to fluorescent patterned hydrogels. Display omitted We have developed a facile strategy to fabricate model multicolor hydrogels via a straightforward mixing process of poly acrylonitrile-grafted methacrylamide (PANMAM), polymethacrylic acid (PMAA) and doped lanthanide (Eu/Tb) and zinc ions to form the interpenetrating dual-polymer gel networks. The hydrogels exhibit excellent tunability of multi-spectrum emission colors (including white light) by simply varying the stoichiometry of metal ions. Furthermore, taking the advantage of different metal ion response mechanisms, we have demonstrated the reversible acidity/alkalinity stimuli-responsive behaviors of white-light-emitting hydrogel (WLE gel). Meanwhile, the unique cross-linked network formed through hydrogen-bonding, metal-ligand coordination and ionic interaction is introduced to achieve favorable mechanical strength of hydrogels. These properties enable the possibility in obtaining fluorescent patterns on hydrogels, which are promising candidate for encrypted information with improved security.
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