Dynamic Coordination of Eu-Iminodiacetate to Control Fluorochromic Response of Polymer Hydrogels to Multistimuli

被引:271
作者
Weng, Gengsheng [1 ,2 ]
Thanneeru, Srinivas [2 ]
He, Jie [2 ,3 ]
机构
[1] Ningbo Univ, Ningbo Key Lab Specialty Polymers, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
[2] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA
[3] Univ Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06269 USA
基金
美国国家科学基金会;
关键词
Eu fluorescence; fluorochromic response; metallohydrogels; multistimuli responsive materials; self-healing hydrogels; METALLO-SUPRAMOLECULAR POLYMERS; OPAL PHOTONIC CRYSTALS; CROSS-LINKING; METALLOSUPRAMOLECULAR POLYMERS; AQUEOUS-SOLUTION; COVALENT BONDS; LIGAND; LUMINESCENCE; EMISSION; STIMULI;
D O I
10.1002/adma.201706526
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
New fluorochromic materials that reversibly change their emission properties in response to their environment are of interest for the development of sensors and light-emitting materials. A new design of Eu-containing polymer hydrogels showing fast self-healing and tunable fluorochromic properties in response to five different stimuli, including pH, temperature, metal ions, sonication, and force, is reported. The polymer hydrogels are fabricated using Eu-iminodiacetate (IDA) coordination in a hydrophilic poly(N, N-dimethylacrylamide) matrix. Dynamic metal-ligand coordination allows reversible formation and disruption of hydrogel networks under various stimuli which makes hydrogels self-healable and injectable. Such hydrogels show interesting switchable ON/OFF luminescence along with the sol-gel transition through the reversible formation and dissociation of Eu-IDA complexes upon various stimuli. It is demonstrated that Eu-containing hydrogels display fast and reversible mechanochromic response as well in hydrogels having interpenetrating polymer network. Those multistimuli responsive fluorochromic hydrogels illustrate a new pathway to make smart optical materials, particularly for biological sensors where multistimuli response is required.
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收藏
页数:7
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