A series of methylthio-substituted poly(ethene–ketone–arylene–ketone)s were synthesized by metal-free catalyzed copolymerization between aromatic diynes and dimethyl sulfoxide (DMSO). The copolymerization can be easily carried out under catalysis by I₂ and BF₃·Et₂O in N,N-dimethyl formamide at 100 °C, resulting in good yields (up to 90.9%) and high molecular weights (M_w up to 13 100). Moreover, the effect of different substituents on the diyne monomers on the M_w, yield and solubility of the resultant polymers was investigated. All these polymers were well characterized by GPC, NMR, and FTIR, and their structures were confirmed. The obtained polymers showed high thermal stability and had high char yields at 800 °C. Moreover, most of the polymers had a high refractive indices of visible light (400 to 800 nm) due to their high sulfur contents. Given the high efficiency, monomer versatility, and excellent performance of the resultant products, this metal-free catalyzed copolymerization between diynes and DMSO opens up new opportunities to prepare advanced functional polymers.

中文翻译：

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通过无金属催化 的芳基二炔与DMSO的共聚反应合成和表征含侧基甲硫基的聚（乙烯-酮-亚芳基-酮）†

通过芳族二炔与二甲基亚砜（DMSO）的无金属催化共聚反应，合成了一系列甲硫基取代的聚（乙烯-酮-亚芳基-酮）。在100°C下，在N，N-二甲基甲酰胺中，I ₂和BF ₃ ·Et ₂ O可以在催化下容易地进行共聚，从而具有良好的收率（最高90.9％）和较高的分子量（最高M _w 13 100）。此外，不同取代基对二元单体在M _{w上的影响}研究了所得聚合物的产率和溶解度。所有这些聚合物均通过GPC，NMR和FTIR进行了很好的表征，并确定了它们的结构。所获得的聚合物显示出高的热稳定性并且在800℃下具有高的炭收率。而且，大多数聚合物由于它们的高硫含量而具有高可见光折射率（​​400至800nm）。鉴于所得产物的高效率，单体多功能性和优异的性能，这种二炔与DMSO之间的无金属催化共聚反应为制备高级功能聚合物提供了新的机会。