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Electron Transport in Ru and Os Polybenzimidazole-Based Metallopolymers

Cameron, Colin G. and Pittman, Timothy J. and Pickup, Peter G. (2001) Electron Transport in Ru and Os Polybenzimidazole-Based Metallopolymers. Journal of Physical Chemistry B, 105 (37). pp. 8838-8844. ISSN 1520-6106. https://resolver.caltech.edu/CaltechAUTHORS:20170616-133753953

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Abstract

A series of conjugated polymer−redox polymer hybrids based on the complexation of poly-(bibenzimidazoles) with bis-(2,2‘-bipyridyl)Ru^(2+) and bis-(2,2‘-bipyridyl)Os^(2+) has been prepared to investigate the effects of electronic communication between metal centers through the conjugated backbone. Electron transport rates in the mixed valence M(III/II) states have been measured as electron diffusion coefficients (D_e) by impedance spectroscopy and dual (sandwich) electrode voltammetry. D_e values are generally higher than for nonconjugated Ru(2,2‘-bipyridyl)^3^(3+/2+)-type polymers, and their dependencies on the metal (Os or Ru), pH and nature of the polymer backbone are consistent with significant contributions from superexchange mechanisms. Hole-type superexchange appears to dominate in the Ru polymers, while a number of observations indicate that electron-type superexchange may dominate for the Os complexes.


Item Type:Article
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http://dx.doi.org/10.1021/jp0109325DOIArticle
http://pubs.acs.org/doi/abs/10.1021/jp0109325PublisherArticle
Additional Information:© 2001 American Chemical Society. Received 12 March 2001. Published online 16 August 2001. Published in print 1 September 2001. This work was supported by the Natural Sciences and Engineering Research Council of Canada and Memorial University.
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Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Memorial UniversityUNSPECIFIED
Issue or Number:37
Record Number:CaltechAUTHORS:20170616-133753953
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170616-133753953
Official Citation:Electron Transport in Ru and Os Polybenzimidazole-Based Metallopolymers Colin G. Cameron, Timothy J. Pittman, and Peter G. Pickup The Journal of Physical Chemistry B 2001 105 (37), 8838-8844 DOI: 10.1021/jp0109325
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78288
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Jun 2017 21:04
Last Modified:03 Oct 2019 18:07

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