首页|In situ crosslink polymerization induced long-lived multicolor supramolecular hydrogel based on modified β-cyclodextrin
In situ crosslink polymerization induced long-lived multicolor supramolecular hydrogel based on modified β-cyclodextrin
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The construction of hydrogels with good mechanical properties and phosphorescent properties is full of challenges.Herein,we report a supramolecular phosphorescent hydrogel with long lifetime,high tensile strength and self-healing property,which can be easily constructed through in-situ thermal-initiated polymerization of isocyanatoethyl acrylate-modified β-cyclodextrin(β-CD-DA)and acrylate-modified adamantane(Ad-DA),acrylic acid(AA),followed by the non-covalent association with carbon dots(CNDs).The lifetime of phosphorescent hydrogel can reach 1261 ms at room temperature,and the quantum yield is 11％.Importantly,through the efficient triplet to singlet Förster resonance energy trans-fer(TS-FRET),the phosphorescent hydrogel shows the good phosphorescence energy transfer property for organic dyes Rhodamine B and Eosin Y with the delayed fluorescence lifetime up to 730 ms and 585 ms as well as the energy transfer efficiency(ΦET)up to 99.9％and 99.3％,respectively.Moreover,owing to the host-guest interactions between β-CD-DA and Ad-DA,the three-dimensional cross-linked network phos-phorescent hydrogel can be easily stretched to 18 times of its original length,and can achieve self-healing of the cut surfaces within 30 min.These results will expand the scope of phosphorescent materials and provide new ideas and opportunities for materials science.
Room temperature phosphorescenceHydrogelPhosphorescence energy transferCyclodextrinSupramolecular interaction
Yonghui Sun、Linnan Jiang、Yong Chen、Yu Liu
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College of Chemistry,State Key Laboratory of Elemento-Organic Chemistry Nankai University,Tianjin 300071,China
国家自然科学基金国家自然科学基金Haihe Laboratory of Sustainable Chemical Transformations
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