Cross-Linked Supramolecular Polymer Gels Constructed from Discrete Multi-pillar[5]arene Metallacycles and Their Multiple Stimuli-Responsive Behavior
作者:Zhong-Yu Li、Yanyan Zhang、Chang-Wei Zhang、Li-Jun Chen、Chao Wang、Hongwei Tan、Yihua Yu、Xiaopeng Li、Hai-Bo Yang
DOI:10.1021/ja413047r
日期:2014.6.18
series of different neutral ditopic guests G1-6 were well investigated. Through host-guest interactions of hexakis-pillar[5]arene metallacycles H2 or H3 with the neutral dinitrile guest G5, the cross-linked supramolecular polymers H2⊃(G5)3 or H3⊃(G5)3 were successfully constructed at the high-concentration region, respectively. Interestingly, these cross-linked supramolecular polymers transformed into
通过配位驱动的自组装成功制备了一系列不同尺寸的离散六柱[5]芳烃金属环,这为制备离散多柱[n]芳烃衍生物提供了很少的成功例子。这些新设计的六柱[5]芳烃金属环用一维(1-D)多核NMR((1)H和(31)P NMR),二维(2-D)(1)H -(1)H COZY 和 NOESY、ESI-TOF-MS、元素分析和 PM6 半经验分子轨道方法。此外,对这种六柱[5]芳烃主体与一系列不同的中性双位客体G1-6的主客体络合进行了很好的研究。通过六柱[5]芳烃金属环H2或H3与中性二腈客体G5的主客体相互作用,分别在高浓度区域成功构建了交联的超分子聚合物H2⊃(G5)3或H3⊃(G5)3。有趣的是,当浓度增加到相对较高的水平时,这些交联的超分子聚合物转化为稳定的超分子凝胶。更重要的是,利用金属-配体键的动态特性和主客体相互作用,在不同刺激下成功实现了这种聚合物凝胶的可逆多重刺激响应凝胶-溶胶相变,如