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The proton conduction mechanism in a material consisting of packed acids

Content Provider	Royal Society of Chemistry (RSC)
Author	Tamaki, Takanori Ohashi, Hidenori Aonuma, Takashi Yamaguchi, Takeo Ushiyama, Hiroshi Yamashita, Koichi Ogawa, Takaya
Copyright Year	2014
Abstract	Proton conduction due to acid–acid interactions is an important topic in a variety of fields, from materials science to biochemistry. We observed a distinctive proton conduction phenomenon for a material consisting of packed acids at the interface of zirconium sulphophenylphosphonate (ZrSPP) and sulphonated poly(arylene ether sulphone) (SPES). The proton in the composite was found to be active, while water, a general proton carrier, remained immobile. Moreover, the conductivity of the composite material was higher than the sum of the individual conductivities of ZrSPP and SPES, which can be attributed to the packed acids present at the interface. We propose a “packed-acid mechanism” based on the results of ab initio calculations in order to explain such a significant and interesting behaviour of protons. During common proton conduction, pseudo-shuttling of a proton between a proton donor and acceptor is a general event that disrupts the reorientation phenomenon, which is an important process associated with common proton conduction. Based on our results, it could be inferred that in packed acid materials, the acid–acid interaction eliminates the pseudo-shuttling (interception) and facilitates reorientation, resulting in successive proton conduction.
Starting Page	4878
Ending Page	4887
Page Count	10
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	5
Issue Number	12
Journal	Chemical Science
DOI	10.1039/c4sc00952e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Zirconium Acid Ether Proton Materials science Biochemistry Composite material Ab initio quantum chemistry methods
Content Type	Text
Resource Type	Article
Subject	Chemistry

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