In situ crosslink polymerization induced long-lived multicolor supramolecular hydrogel based on modifiedβ-cyclodextrin  

作　　者：Yonghui Sun Linnan Jiang Yong Chen Yu Liu 

机构地区：[1]College of Chemistry,State Key Laboratory of Elemento-Organic Chemistry Nankai University,Tianjin 300071,China

出　　处：《Chinese Chemical Letters》2024年第2期374-379,共6页中国化学快报（英文版）

基　　金：National Natural Science Foundation of China(NNSFC,No.22131008);the Haihe Laboratory of Sustainable Chemical Transformations for financial support.

摘　　要：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 thermalinitiated polymerization of isocyanatoethyl acrylate-modifiedβ-cyclodextrin(β-CD-DA)and acrylatemodified 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 transfer(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(Φ_(ET))up to 99.9%and 99.3%,respectively.Moreover,owing to the host-guest interactions betweenβ-CD-DA and Ad-DA,the three-dimensional cross-linked network phosphorescent 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.

关 键 词：Room temperature phosphorescence Hydrogel Phosphorescence energy transfer CYCLODEXTRIN Supramolecular interaction 

分 类 号：TQ427.26[化学工程]