Pd-Salen and Pd-Salan complexes: Characterization and application in styrene polymerization
作者:Liqin Ding、Zeng Chu、Leilei Chen、Xingqiang Lü、Biao Yan、Jirong Song、Daidi Fan、Feng Bao
DOI:10.1016/j.inoche.2011.01.028
日期:2011.4
Abstract Two new Pd2+ complexes based on the Salen-type H2L1 or Salan-type H2L2 ligand (H2L1 = N,N′-Bis(3-methoxy-salicylidene)phenylene-1,2-diamine), H2L2 = 1,2-Bis(2-hydroxyl-3-methoxy-phenyl)methylamino-benzene), were synthesized and characterized by FT-IR, 1H NMR and X-ray crystallography. They were shown to catalyze the polymerization of styrene, giving the syndio-enriched atactic polystyrenes
摘要 两种基于 Salen 型 H2L1 或 Salan 型 H2L2 配体的新型 Pd2+ 配合物 (H2L1 = N,N'-Bis(3-methoxy-salicylidene)phenylene-1,2-diamine), H2L2 = 1,2-Bis (2-羟基-3-甲氧基-苯基)甲氨基-苯),合成并通过FT-IR、1H NMR和X-射线晶体学表征。它们被证明可以催化苯乙烯的聚合,得到具有中等分子量和窄分子量分布的间苯二酚富集的无规立构聚苯乙烯。聚合物产物的详细立体有规分析表明,活性物质的亲电性或路易斯酸度通过从 Salen 型配体还原为 Salan 型配体而略有增加,除了催化活性增加外,立体选择性也显着增加。