A novel achiral phenylacetylene having a bulky t-butyl group was synthesized and polymerized by a chiral catalytic system containing [Rh(nbd)Cl]2 (nbd: norbornadiene) and chiral amines to yield a one-handed helical polymer having a much higher g value than polymers with no bulky groups. Highly efficient helix-sense-selective polymerization has been achieved using a bulky monomer and a less bulky chiral cocatalyst.
合成了一种新型非手性苯乙炔,该苯乙炔带有一个笨重的 t-丁基,通过含有 [Rh(nbd)Cl]2 (nbd:降冰片二烯)和手性胺的手性催化体系进行聚合,得到了一种单手螺旋聚合物,其 g 值远远高于不含笨重基团的聚合物。利用笨重的单体和笨重程度较低的手性助催化剂,实现了高效的螺旋感应选择性聚合。