钯催化体系下双取代乙炔聚合的研究进展

Research Progress on the Polymerization of Disubstituted Acetylene Monomers by Pd Catalysts

双取代聚乙炔是重要的功能高分子材料,当聚炔侧基含有功能性基团时,聚合物可以表现出优异的性质,如液晶性、发光性、亲水性、疏水性、生物活性等,具有巨大的实际应用前景。而双取代乙炔单体的聚合十分困难,使用的催化剂主要集中在前过渡金属催化剂,如Mo系、W系等。近几年,具有大体积烷基单膦配体的Pd催化体系表现出良好的催化活性,据报道有望有望合成出顺式立构规整性的双取代乙炔聚合物。

Disubstituted polyacetylenes with functional side groups show corresponding functionality,such as liquid crystallinity,light emission,hydrophilicity,lipophilicity,biological activity and so on. They have a great application prospect. However,the polymerization of disubstituted polyacetylenes is rather difficult,the polymerization of disubstituted polyacetylenes mainly focused on early transition metal catalysts. In recent years,introduction of bulky alkyl monophosphines to palladium-catalyzed reactions has shown to yield high activities,it's said that a cis-stereoregulated disubstituted acetylene polymer would be synthesized.