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The voltammetric reduction, deprotonation and surface activity of ruthenium photovoltaic sensitizers in acetone

Wolfbauer, Georg, Bond, Alan M., Deacon, Glen B., Howitt, Julia, MacFarlane, Douglas and Spiccia, Leone 2001, The voltammetric reduction, deprotonation and surface activity of ruthenium photovoltaic sensitizers in acetone, Electrochemistry communications, vol. 3, no. 8, pp. 400-405, doi: 10.1016/S1388-2481(01)00180-1.

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Title The voltammetric reduction, deprotonation and surface activity of ruthenium photovoltaic sensitizers in acetone
Author(s) Wolfbauer, Georg
Bond, Alan M.
Deacon, Glen B.
Howitt, Julia
MacFarlane, Douglas
Spiccia, Leone
Journal name Electrochemistry communications
Volume number 3
Issue number 8
Start page 400
End page 405
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2001-08
ISSN 1388-2481
1873-1902
Keyword(s) photovoltaic sensitizers
reversible potential
surface activity
Summary The reductive voltammetry of the photovoltaic sensitizer [(H2-dcbpy)2Ru(NCS)2] (H2-dcbpy=2,2′-bipyridine-4,4′-dicarboxylic acid) and [(H3-tctpy)Ru(NCS)3]− (H3-tctpy=2,2′:6′,2″-terpyridine-4,4′,4″-tricarboxylic acid) has been investigated in acetone. Significant surface interactions at both platinum and glassy carbon electrodes occur at 0.6 V prior to the reversible potential expected for ligand-based reduction process of the fully protonated acids. The origin of the surface interactions are attributed to the acid–base behaviour of the compounds, combined with overall deprotonation and reduction to hydrogen, since repetitive cycling of the potential reveals well-defined reversible reduction processes in the negative potential range, resulting from formation of doubly deprotonated [(H-dcbpy−)2Ru(NCS)2]2− and singly deprotonated [(H2-tctpy−)Ru(NCS)3]2−, respectively. The extent of the surface interactions has been estimated by electrochemical quartz crystal microbalance and chronocoulometric measurements. Under certain conditions, a thick conducting polymer consisting of several hundred monolayers is formed.
Language eng
DOI 10.1016/S1388-2481(01)00180-1
Field of Research 030207 Transition Metal Chemistry
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2001, Elsevier Science B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30006622

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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