Construction of Smart Supramolecular Polymeric Hydrogels Cross-linked by Discrete Organoplatinum(II) Metallacycles via Post-Assembly Polymerization

• DOI: 10.1021/jacs.6b01089
• Publication Date: 2016-03-24T16:55:10Z
• Authors: Wei Zheng; Li-Jun Chen; Guang Yang; Bin Sun; Xu Wang; Bo Jiang; Guang-Qiang Yin; Li Zhang; Xiaopeng Li; Minghua Liu; Guosong Chen; Hai-Bo Yang
• Keywords: 02 engineering and technology; 0210 nano-technology

Postassembly modification strategy has been successfully employed in the construction of discrete metallosupramolecular assemblies. However, most known reports have limited to simple structural conversion through easy covalent reactions, thus hindering development organometallic functional materials. In this study, we first combined coordination-driven self-assembly and postassembly reversible addition–fragmentation chain-transfer (RAFT) polymerization produce a new family star supramolecular polymers containing well-defined metallacycles as cores, which featured typical lower critical solution temperature (LCST) behavior water because existence poly(N-isopropylacrylamide) (PNIPAAM) moieties. Moreover, obtained could further form hydrogels cross-linked by hexagonal at room without heating–cooling process. Interestingly, resultant polymeric exhibited stimuli-responsive toward bromide anion well self-healing property. We demonstrated that dynamic nature Pt–N bonds played an important role determining property final soft matters. Thus, merging provided avenue preparation materials well-defined, metal–organic assemblies main scaffolds.