Formation of self-assembled monolayers on gold electrodes with inclusion complexes of cyclodextrins and viologens

A novel kind of electroactive self-assembled monolayer (SAM) has been successfully prepared through the following procedure: (1) formation of inclusion complexes (denoted as CD/C sub 8 VC sub 10 SH) between N-(n-octyl)-N'-(10-mercaptodecyl)-4,4'-bipyridinium dibromide (C sub 8 VC sub 10 SH...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1997-11, Vol.144 (11), p.3858-3865
Main Authors: YAN, J, DONG, S, LI, J, CHEN, W
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Study of interfaces
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Summary:A novel kind of electroactive self-assembled monolayer (SAM) has been successfully prepared through the following procedure: (1) formation of inclusion complexes (denoted as CD/C sub 8 VC sub 10 SH) between N-(n-octyl)-N'-(10-mercaptodecyl)-4,4'-bipyridinium dibromide (C sub 8 VC sub 10 SH) and alpha -, beta -cyclodextrin (CD) under a mild condition; (2) spontaneous formation of SAM of CD/C sub 8 VC sub 10 SH on gold electrodes at room temperature. High-resolution exp 1 H-NMR spectrum was used to confirm the formation of CD/C sub 8 VC sub 10 SH. Cyclic voltammetry was used to characterize the redox behavior of the resulting monolayers and chronoamperometry and electrochemical impedance spectroscopy to characterize their electron transfer kinetics. It was found that the redox sites in SAM of CD/C sub 8 VC sub 10 SH are effectively diluted, with a larger electron transfer rate constant than that of SAM of C sub 8 VC sub 10 SH.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.1838102