摘要
采用原位紫外分光光度法研究了吡咯与苯甲醛、对二甲氨苯甲醛、香草醛及对硝基苯甲醛反应生成聚吡咯甲烯类聚合物过程中的合成反应机理 .研究表明 ,聚吡咯甲烯的合成反应为一零级反应 ,其反应速率与催化剂的酸度有关 ,而与吡咯和醛的浓度无关 .苯环上吸电子基团的存在有利于聚合反应的进行 ,较大空间位阻基团的存在则使聚合反应的速率下降 .
The mechanism of polymeric reaction of pyrrole with benzaldehyde, vanilin, p dimethylaminobenzaldehyde and p nitrobenzaldehyde was studied by using in situ UV Vis spectroscopy, respectively. The results indicate that the synthesis reactions of poly[pyrrolyl methines] using pyrrole with aldehydes are zero order reactions. The rate of polymeric reaction is only related to the concentration of acid. The withdraw electron group on the phenyl ring can accelerate the polymeric reaction,and the large steric hindrance group will decrease the reaction rate.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2002年第1期94-98,共5页
Journal of Xi'an Jiaotong University
基金
中国科学院化学所有机固体开放实验室基金资助项目 .
