期刊名称：Pakistan Journal of Analytical & Environmental Chemistry
印刷版ISSN：1996-918X
电子版ISSN：2221-5255
出版年度：2016
卷号：17
期号：1
页码：58-64
DOI：10.21743/pjaec/2016.06.009
语种：English
出版社：National Centre of Excellence in Analytical Chemsitry
摘要：Complex formation between benzyl viologen and β-Cyclodextrin (βCD) in 9:1(v/v) DMF-H2O mixed solution was studied by cyclic voltammetry. In order to examine the probable mechanism of the reaction of benzyl viologen dication (BzV2+) and its reduced forms with βCD,cyclic voltammograms were digitally simulated. Detailed analysis of the mechanism by digital simulation revealed that in 9:1(v/v) DMF-H2O mixed solution,benzyl viologen mono-cation (BzV+∙ ) formed inclusion complex with βCD according to EC mechanism,while its fully reduced form (BzV°),could not form inclusion complex with βCD. Bonding equilibrium constant,Keq,pertaining to the bonding of BzV+∙ with βCD was estimated as 10.6 M-n . The second order rate constant for the reaction of BzV+∙ with βCD was determined as 4.93 M-nS - . By the use of this solvent system (9:1(v/v) DMF- H2O mixed solution) the comprehensive study of non-alkyl group substituted viologens and long alkyl chain viologens with βCD is possible..
