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Simplified Preparations and Electrochemical Behavior of Two Chromium-Substituted Heteropolytungstate Anions

Rong, Chaoying and Anson, Fred C. (1994) Simplified Preparations and Electrochemical Behavior of Two Chromium-Substituted Heteropolytungstate Anions. Inorganic Chemistry, 33 (6). pp. 1064-1070. ISSN 0020-1669. https://resolver.caltech.edu/CaltechAUTHORS:20180529-153402798

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Abstract

Simplified preparative procedures are described for the generation of α-[PW_(11)O_(39)Cr^(III)(OH_2)]^(4-) and α2-[P_2W_(11)O_(61)Cr^(III)(OH_2)]^(7-) anions which can be readily oxidized, chemically or electrochemically, to α-[PW_(11)O_(39)Cr^(V)O]^(4-) and α2-[P_2W_(17)O_(61)Cr^(V)O]^(7-). The oxidized complexes are stable in aqueous solutions. They react with benzyl or ethyl alcohol, but the rates of the oxidations are too slow to make the Cr(V) derivatives attractive as electrocatalysts. The voltammetry of the Cr^(V)/Cr^(III) couples is only quasi-reversible, but approximate formal potentials with their pH dependencies are reported. Diffusion coefficients evaluated for the polyanions show the larger anion to diffuse more slowly and neither anion to be highly hydrated.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/ic00084a016DOIArticle
Additional Information:© 1994 American Chemical Society. Received August 27, 1993. This work was supported by a grant from the ONR/DARPA.
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)UNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Arthur Amos Noyes Laboratory of Chemical Physics8827
Issue or Number:6
Record Number:CaltechAUTHORS:20180529-153402798
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180529-153402798
Official Citation:Simplified Preparations and Electrochemical Behavior of Two Chromium-Substituted Heteropolytungstate Anions Chaoying Rong and Fred C. Anson Inorganic Chemistry 1994 33 (6), 1064-1070 DOI: 10.1021/ic00084a016
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86687
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:29 May 2018 23:14
Last Modified:03 Oct 2019 19:46

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