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Polymerization within a molecular-scale stereoregular template

机译:分子尺度立体规则模板内的聚合

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Enzymes efficiently synthesize biopolymers by organizing monomer units within regularly structured molecular-scale spaces and exploiting weak non-covalent interactions, such as hydrogen bonds, to control the polymerization(1) process. This 'template' approach is both attractive and challenging for synthetic polymer synthesis, where structurally regulated molecular-scale spaces could in principle provide solid-phase reaction sites for precision polymerization. Previously, free-radical polymerization of methyl methacrylate in solutions containing stereoregular isotactic ( it) or syndiotactic (st) poly( methyl methacrylate) ( PMMA) has been shown to result in template synthesis(2,3) of the opposite PMMA based on stereocomplex formation(4,5) with van der Waals interactions. However, using the structure of a solid to determine the stereochemical structure of a polymer has not been satisfactorily achieved(6). Here we show that macromolecularly porous ultrathin films, fabricated by a single assembly step, can be used for the highly efficient stereoregular template polymerization of methacrylates through stereocomplex formation. This reaction mould accurately transfers its structural properties of stereo-regularity, molecular weight and organization within the template to the new polymer.
机译:酶通过在规则结构的分子尺度空间内组织单体单元并利用弱的非共价相互作用(例如氢键)来控制聚合过程,从而有效地合成了生物聚合物(1)。对于合成聚合物合成而言,这种“模板”方法既有吸引力又具有挑战性,因为结构调节的分子尺度空间原则上可以为精密聚合提供固相反应位点。以前,已证明甲基丙烯酸甲酯在含有立构规则的等规(it)或间规(st)的聚甲基丙烯酸甲酯(PMMA)的溶液中的自由基聚合可导致基于立体配合物的相反PMMA的模板合成(2,3)。与范德华相互作用的地层(4,5)。然而,使用固体的结构来确定聚合物的立体化学结构尚未令人满意(6)。在这里,我们表明通过单个组装步骤制造的大分子多孔超薄膜可用于通过立体配合物形成的甲基丙烯酸酯的高效立体规则模板聚合。该反应模具可将模板中的立体规则性,分子量和组织结构特征准确地转移到新聚合物上。

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