Alabi, Christopher A. and Chen, Zhongwei and Yan, Yushan S. and Davis, Mark E. (2009) Insights into the Nature of Synergistic Effects in Proton-Conducting 4,4−1H,1H-Bitriazole-Poly(ethylene oxide) Composites. Chemistry of Materials, 21 (19). pp. 4645-2652. ISSN 0897-4756 http://resolver.caltech.edu/CaltechAUTHORS:20091020-133220333
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A nitrogen-containing heterocycle (NCH), 4,4-1H-1H-bi-1,2,3-triazole (bitriazole), capable of mimicking the hydrogen bonding of water in the solid state is synthesized and its ability to conduct protons in the presence of poly(ethylene oxides) under anhydrous conditions is investigated. Bitriazole is shown to have sufficient thermal and electrochemical stability for fuel cell applications. The composites formed between bitriazole and poly(ethylene oxides) give proton conductivities that can be described by the Vogel−Tamman−Fulcher (VTF) equation. These characteristics suggest coupling between polymer segmental motion and ion transport. The bitriazole N-H proton is shown to be the source of conductivity, and bitriazole and poly(ethylene oxides) function synergistically through specific intermolecular interactions and polymer-induced segmental motion to create a pathway for proton transport via structural diffusion.
|Additional Information:||© 2009 American Chemical Society. Published In Issue October 13, 2009, Article ASAP September 08, 2009, Received: June 24, 2009, Revised: August 25, 2009. This work was supported by the DOE (DE-FG02-05ER15716). Supporting Information Available: Experimental details, TGA, CV, FT-IR andNMRdata (Figures S1-S5) (PDF). This material is available free of charge via the Internet at http://pubs.acs.org.|
|Official Citation:||Insights into the Nature of Synergistic Effects in Proton-Conducting 4,4−1H,1H-Bitriazole-Poly(ethylene oxide) Composites Christopher A. Alabi, Zhongwei Chen, Yushan S. Yan, Mark E. Davis Chemistry of Materials 2009 21 (19), 4645-4652|
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|Deposited By:||Joy Painter|
|Deposited On:||26 Oct 2009 21:23|
|Last Modified:||26 Dec 2012 11:29|
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