Copolymerization of carbon dioxide and propylene oxide catalyzed by two kinds of bifunctional salen‐cobalt(III) complexes bearing four quaternary ammonium salts
作者:Longchao Du、Chengze Wang、Weiju Zhu、Jie Zhang
DOI:10.1002/jccs.201900077
日期:2020.1
new bifunctional salen‐cobalt(III) complexes were synthesized, which consist of salicylaldehyde bearing four quaternary ammonium salts and two different diamines. The copolymerization results indicated that decreasing temperature is advantageous for both the complexes. Of both the diamines, the complex 9 with o‐diaminobenzene has a higher catalytic effect compared to complex 6 with 1,2‐diaminocyclohexane
合成了两种新的双功能萨伦-钴(III)配合物,它们由带有四种季铵盐和两种不同二胺的水杨醛组成。共聚结果表明,降低温度对两种配合物都是有利的。在两种二胺中,与邻二氨基苯的配合物9相比具有1,2-二氨基环己烷的配合物6具有更高的催化作用。在30℃的温度下,配合物9的催化作用是配合物6的3.5倍以上。的研究P CO2的共聚,发现该第一秩压力为以2MPa对两种复合物。最高周转次数是在T = 30°C,P CO2 = 2 MPa和t = 24小时。差示扫描量热仪曲线表明,配合物9的聚碳酸亚丙酯(PPC)的最高Tg为54.2℃。DTGA曲线显示有两个热降解峰,第一个是酯键,第二个是C-C键。