Electrochemical study of rose bengal at the electrochemical quartz crystal microbalance

Andrieux, F. P.L. and Boxall, C. (2007) Electrochemical study of rose bengal at the electrochemical quartz crystal microbalance. In: ECS Trancsactions - Organic and Biological Electrochemistry General Oral and Poster Session. ECS Transactions (6). The Electrochemical Society, USA, pp. 67-77. ISBN 9781604238822

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Abstract

We present the results of an Electrochemical Quartz Crystal Microbalance study of the dark electrochemical behavior of rose bengal on gold piezoelectrodes in phosphate buffer at pH=7. Five oxidation and two reduction peaks were identified. The first oxidation process (Epox1=0.52V) is attributed to the formation of a Charge Transfer Complex (CTC) of rose bengal. The second process (Epox2=0.76V) is due to the partial breakdown of that CTC. The third process (Epox3=1.12V) is the electrochemical formation of a rose bengal polymer. Peak four (Epox4=1.24V) is due to the electrochemistry of the underlying gold surface, whilst peak five (Ep ox5=1.45V) is attributed to a process that facilitates transpassive polymerization. The first reduction peak (Epred1=0.42V) is due to gold oxide stripping and the second (Epred2=0.36V) is the reduction of residual charge transfer complex formed in the first oxidation process.

Item Type:
Contribution in Book/Report/Proceedings
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200
Subjects:
ID Code:
134338
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Deposited On:
22 Jun 2019 01:03
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:56