Electrochromism of Methylviologen (Paraquat)
The herbicide paraquat, N, N’-dimethyl-4,4‘-bipyridiunium dication (N,N’-methyl viologen), is electrochromic. Experiments are described that investigate its redox chemistry (cyclic voltammetry), its optical properties (photometry and UV/Vis spectrophotometry), and its potential as a system for electrical “photoswitching” and as an ...
Electrochemical behaviour of methyl viologen in a matrix of paper
1999年9月15日 · Methyl viologen (MV) has been incorporated into paper as an aqueous solution and in the viscous electrolyte polyAMPS, and the availability of the MV for electron-transfer has been investigated by cyclic voltammetry at a stationary platinum disc electrode.
(a) Three reversible redox states of methyl viologen (MV); (b) cyclic …
... reversible redox behavior of viologens can be con rmed via cyclic voltammetry (CV). Fig. 1b shows the CV curve of methyl viologen (MV).
Computational and cyclic voltammetry studies of high effective …
2019年5月24日 · In order to investigate if these viologen core distortions, induced by the helical scaffolds, lead to novel electrochemical behaviour we have studied the dication to radical cation reductions of 2 2+, 3 2+, and 4 2+ using cyclic voltammetry (CV) and computational studies.
Two electron utilization of methyl viologen anolyte in …
2018年9月1日 · Cyclic voltammetry (CV) experiments were conducted to determine the redox potential and reversibility of both active materials in a nonaqueous supporting electrolyte.
Cyclic Voltammetry I. Introduction Cyclic voltammetry will be used to determine the half-wave potential (E ½), the number of electrons transferred (n) and the reversibility for the first and second reduction processes of methyl viologen (MV2+): methyl viologen = 1,1N-dimethyl-4,4N-bipyridinium MV2+ + ne-W MV+C (1) MV+C + ne-W MVCC (2)
Cyclic voltammograms of MV2+ in water at various concentrations (at 50mV/s) and for different scan rates shown in Figs. (3 and 4). The electrochemical parameters extracted from Figs. 3, for different concentrations of methyl viologen, are collected in Table-1. It is noticed that, unlike the
Fig. 2 (a) Cyclic voltammogram of 10 mm methyl viologen in …
... electrochromic molecule, methyl viologen (MV 2+ ), was used as the indicator in the reporter cell of the device. Fig. 2 (a) shows the cyclic voltammetry (CV) of MV 2+ at the ITO working...
Cyclic Voltammetry and In Situ Laser Raman Spectroscopy …
1983年7月1日 · The electrogeneration of methyl viologen radical cation (MV +) at a silver electrode in chloride solution has been studied. Evidences for the adsorption of MV + or a related species have been obtained by cyclic voltammetry and in …
Cyclic voltammograms of methyl viologen (paraquat) and …
Cyclic voltammetry and spectroelectrochemical studies reveal that multiple redox states can be reversibly accessed with transfer of up to 10 electrons and switchable electrochromic...
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