Zhu Yu, Jiang Hanqiu, Wu Weiwei, Xu Xiao-Qin, Wang Xu-Qing, Li Wei-Jian, Xu Wei-Tao, Liu GengXin, Ke Yubin, Wang Wei, Yang Hai-Bo
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China.
Spallation Neutron Source Science Center, Dongguan, 523803, P. R. China.
Nat Commun. 2023 Aug 31;14(1):5307. doi: 10.1038/s41467-023-41134-8.
Aiming at the creation of polymers with attractive dynamic properties, herein, rotaxane-branched dendronized polymers (DPs) with rotaxane-branched dendrons attached onto the polymer chains are proposed. Starting from macromonomers with both rotaxane-branched dendrons and polymerization site, targeted rotaxane-branched DPs are successfully synthesized through ring-opening metathesis polymerization (ROMP). Interestingly, due to the existence of multiple switchable [2]rotaxane branches within the attached dendrons, anion-induced reversible thickness modulation of the resultant rotaxane-branched DPs is achieved, which further lead to tunable thermal and rheological properties, making them attractive platform for the construction of smart polymeric materials.
为了制备具有引人注目的动态性能的聚合物，本文提出了一种在聚合物链上连接有轮烷支化树枝状分子的轮烷支化树枝状聚合物（DPs）。从具有轮烷支化树枝状分子和聚合位点的大分子单体出发，通过开环易位聚合（ROMP）成功合成了目标轮烷支化DPs。有趣的是，由于连接的树枝状分子中存在多个可切换的[2]轮烷分支，实现了阴离子诱导的所得轮烷支化DPs的可逆厚度调制，这进一步导致了可调的热性能和流变性能，使其成为构建智能高分子材料的有吸引力的平台。
