Fabrication of Double-Stranded Vinyl Polymers Mediated by Coordination Nanochannels
Fabrication of Double-Stranded Vinyl Polymers Mediated by Coordination Nanochannels
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DOI：
10.1021/jacs.2c11723
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发表时间：
2023-01-19
影响因子：
15
通讯作者：
Uemura, Takashi
中科院分区：
文献类型：
--
作者：
Abe, Masahiro;Kametani, Yuki;Uemura, Takashi
虽然双链结构通常存在于生物聚合物中，但尚未开发出用于制造双链合成聚合物的通用且通用的方法。在这里，我们报告了一种新的方法来合成由聚苯乙烯和聚（甲基丙烯酸甲酯）的双链聚合物。我们在金属有机骨架（MOF）内进行了交联自由基聚合，该骨架具有直径与两个聚合物链的厚度相似的一维通道。有效的空间约束内的MOF孔促进高度调节的交联反应之间的两个聚合物链与扩展的构象。值得注意的是，所获得的双链聚合物可溶于许多有机溶剂中，甚至在高交联比（20%）下也是如此，这与常规交联聚合物不同。值得注意的是，这种稳定的双链拓扑结构，这是无法使用以前的方法，赋予双链乙烯基聚合物在溶液和本体状态的不寻常的性能。通过设计MOF纳米通道的性质，所提出的技术可以有助于开发各种合成聚合物双链体。
Although double-stranded structures are commonly found in biopolymers, a general and versatile methodology for fabricating double-stranded synthetic polymers has not yet been developed. Here, we report a new approach for synthesizing double-stranded polymers composed of polystyrene and poly (methyl methacrylate). We conducted crosslinking radical polymerization inside a metal-organic framework (MOF), which had onedimensional channels with diameters similar to the thickness of two polymer chains. Effective spatial constraint within the MOF pores facilitated highly regulated crosslinking reactions between two polymer chains with extended conformations. Remarkably, the obtained double-stranded polymers were soluble in many organic solvents, even at a high crosslinking ratio (20%), unlike conventional crosslinked polymers. Notably, this stable duplex topology, which was inaccessible using previous methods, endowed the double-stranded vinyl polymers with unusual properties in the solution and bulk states. By designing the properties of the MOF nanochannels, the proposed technique can contribute to the development of a wide range of synthetic polymer duplexes.