Dynamics of Polymeric Reactions of Poly£ÛPyrrolyl Methines£Ý
Yan Wei,Wei Zhixiang,Wang Lili
(School of Environmental and Chemical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

Abstract: The mechanism of polymeric reaction of pyrrole with benzaldehyde, vanilin, p-dimethylaminobenzaldehyde and p-nitrobenzaldehyde was studied by using inª²situ UV-Vis spectroscopy, respectively.The results indicate that the synthesis reactions of poly£Ûpyrrolyl methines£Ý using pyrrole with aldehydes are zero order reactions. The rate of polymeric reacti
on is only related to the concentration of acid. The withdrawª²electron group on the phenyl ring can accelerate the polymeric reaction,and the large steric hindrance group will decrease the reaction rate.
Keywords: inª²situ UV-Vis spectroscopy;poly£Ûpyrrolyl methines£Ý;dynamics of reaction