Abstract
Thermochromic polymers with tunable thermochromism,high stretchability and mechanical strength are of interests for optical infor-mation storage and encryption.In this work,we demonstrate a new design of thermo-fluorochromic carboxylated nitrile butadiene rubber(XNBR)elastomer cross-linked by Eu3+-COOH dynamic coordination with deprotonated imidazole(DPIm)as the ancillary ligand.The presence of DPIm not only improves the mechanical strength and stretchability,but also dramatically intensifies the fluorescence emission and lifetime of the Eu-containing elastomer.The elastomer behaves reversible thermo-fluorochromism with easily tunable transition temperature and emission in-tensity by the simple change of the deprotonation degree of imidazole.The facile tunable thermo-fluorochromism,exceptional mechanical strength,and high stretchability(up to about 5000％)enable the Eu-containing XNBR elastomer with potential applications in soft electronics where optical information storage and encryption are required.
基金项目
National Natural Science Foundation of China(22175100)
Natural Science Foundation of Zhejiang Province(LY22E030001)
Natural Science Foundation of Ningbo(2022J102)
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