Citation: LIANG Zhaoxi, LI Wen, LI Manfu. PHOTOREDUCTION OF ALKYL VIOLOGENS AND POLYVlOLOGENS IN 2-PROPANOL AQUEOUS SOLUTION[J]. Chinese Journal of Polymer Science, ;1987, 5(3): 254-260. shu

PHOTOREDUCTION OF ALKYL VIOLOGENS AND POLYVlOLOGENS IN 2-PROPANOL AQUEOUS SOLUTION

Received Date: 15 November 1986

In order to study the effect ofalkyl chain length and the polymer effect on the photoreduction behavior of some viologens, a series of alkyl viologen, polyviologen and bisviologen compounds have been synthesized. In the presence of excess 2-propanol, the initial photoreduction of alkyl viologens and polyviologens follow the peudo--seeond--order reaction, the calculated rate constants are related to the alkyl chain length: In addition, the intramoleeular association of radical cations of polyviologens has been found even in dilute solution.Hoowever the extent of association is varied with the alkyl chain length.The observed polymer effect of polyviologens in the photoreduction is significant which can be explained in terms of the mature of second order reaction.
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