State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Macromol Rapid Commun. 2018 Oct;39(20):e1800133. doi: 10.1002/marc.201800133. Epub 2018 May 22.
A photoresponsive host-guest supramolecular complex (WP5⊃G) constructed by water-soluble pillar[5]arene (WP5) and spiropyran derivative (G) is presented. The spontaneous isomerization of G from spiropyran (SP) form to ring-opened merocyanine (MC) form happens either alone or in WP5⊃G in aqueous media. Irradiated by visible light, G can be converted into SP form completely and the hydrophilicity will be changed. G and WP5⊃G are both verified to self-assemble into nanospheres. Upon exposure to visible light, WP5⊃G reassemble into nanovesicles due to the change of supra-amphiphilicity, while G alone does not have this transition. Obviously, WP5 takes the key role that activates the photoinduced morphological transition.
本文报道了一种由水溶性柱芳烃（WP5）和螺吡喃衍生物（G）构筑的光响应主客体超分子复合物（WP5⊃G）。在水相介质中，G 可自发发生从螺吡喃（SP）构象到开环型部花菁（MC）构象的异构化，或者在 WP5⊃G 中发生该异构化。可见光照射下，G 可完全转化为 SP 构象，同时亲水性也会发生改变。G 和 WP5⊃G 均被证实可自组装成纳米球。暴露于可见光下，由于超两亲性的变化，WP5⊃G 重新组装成纳米囊泡，而 G 单独则没有这种转变。显然，WP5 起着关键作用，激活了光诱导的形态转变。
