Stimuli-responsive hydrogels prepared by simultaneous “click chemistry” and metal–ligand coordination
Stimuli-responsive hydrogels prepared by simultaneous “click chemistry” and metal–ligand coordination
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DOI：
10.1039/c4ra11946k
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发表时间：
2015-02
期刊：
影响因子：
3.9
通讯作者：
Yang Li;Chao Zhou;Liqun Xu;F. Yao;L. Cen;G. Fu
中科院分区：
文献类型：
--
作者：
Yang Li;Chao Zhou;Liqun Xu;F. Yao;L. Cen;G. Fu
提出了一种通过一锅法CuAAC和非共价金属配位化学合成刺激响应性金属配位聚合物凝胶（MCPG）的新策略。以4′-（4-丙-2-炔氧基苯基）-2，2 ′：6′，2 ′′-三联吡啶（Terpy-φ-CH 2CCH）和α，ω-二叠氮基/羟基PEG（PEG 45（N3）2）为前体，合成了主链上含有1，2，3-三唑环和三联吡啶配体的线性三联吡啶端PEG衍生物，并将其作为螯合过渡金属和镧系金属离子的配体。结果发现，桥接金属配合物不仅可以作为三维聚合物网络中的支化或交联位点，而且还可以赋予最终凝胶特殊的性质，例如刺激响应性和触变性特征，从而允许容易和有效的设计和合成有前途的智能材料。
A novel strategy to synthesize stimuli-responsive metal-coordinated polymeric gels (MCPGs) via one-pot CuAAC and non-covalent metal coordination chemistry was demonstrated. 4′-(4-Prop-2-ynyloxyphenyl)-2,2′:6′,2′′-terpyridine (Terpy-φ-CH2CCH) and α,ω-diazido/hydroxyl PEG (PEG45(N3)2) were used as precursors to yield linear terpyridine-terminated PEG derivatives with 1,2,3-triazole rings and terpyridine ligands in their main chains to serve as ligands for chelating a range of transition and/or lanthanide metal ions. It was found that the bridging metal complexes could not only act as branching or crosslinking sites within the three-dimensional polymer networks but could also bestow special properties to the final gels, such as stimuli-responsive and thixotropic features, thereby allowing facile and efficient design and synthesis of promising intelligent materials.