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Structure of Proton-Conducting Alkali Thio-Hydroxogermanates

Karlsson, Maths LU ; Matic, Aleksandar; Panas, Itai; Bowron, Daniel T.; Martin, Steve W.; Nelson, Carly R.; Martindale, Chad A.; Hall, Andreas and Borjesson, Lars (2008) In Chemistry of Materials 20(19). p.6014-6021
Abstract
Using it combination Of neutron diffraction, infrared spectroscopy. and first-principles calculations, we have investigated the structure of hydrated and dehydrated proton conducting alkali thio-hydroxogermanates of general formula M2GeS2(OH)(2)center dot yH(2)O (M = K, Rb, and Cs). The results show that the structure of hydrated and dry materials are basically the same, which confirms previous indications that the main effect of heating these materials is just a loss of water. We suggest that in the hydrated state the structure of these materials is built of dimers of thio-hydroxogermanate anions, with the water molecules acting, as bridges between such dimers. In the dehydrated structure,. file thio-hydroxogermanate anions instead form... (More)
Using it combination Of neutron diffraction, infrared spectroscopy. and first-principles calculations, we have investigated the structure of hydrated and dehydrated proton conducting alkali thio-hydroxogermanates of general formula M2GeS2(OH)(2)center dot yH(2)O (M = K, Rb, and Cs). The results show that the structure of hydrated and dry materials are basically the same, which confirms previous indications that the main effect of heating these materials is just a loss of water. We suggest that in the hydrated state the structure of these materials is built of dimers of thio-hydroxogermanate anions, with the water molecules acting, as bridges between such dimers. In the dehydrated structure,. file thio-hydroxogermanate anions instead form an extended network- through the formation of interdimer hydrogen bonds through the -OH groups in the structure. The alkali ions are suggested to act as "space-fillers" in voids formed by the thio-hydroxogermanate anion dimers. in both the hydrated and the dehydrated state. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemistry of Materials
volume
20
issue
19
pages
6014 - 6021
publisher
The American Chemical Society
external identifiers
  • wos:000259871500012
  • scopus:54849409182
ISSN
0897-4756
DOI
10.1021/cm8006155
language
English
LU publication?
yes
id
4c482dfb-0ee6-4d4f-b3ea-3b7fbb4eb773 (old id 1285831)
date added to LUP
2009-02-09 14:26:10
date last changed
2017-01-01 04:34:15
@article{4c482dfb-0ee6-4d4f-b3ea-3b7fbb4eb773,
  abstract     = {Using it combination Of neutron diffraction, infrared spectroscopy. and first-principles calculations, we have investigated the structure of hydrated and dehydrated proton conducting alkali thio-hydroxogermanates of general formula M2GeS2(OH)(2)center dot yH(2)O (M = K, Rb, and Cs). The results show that the structure of hydrated and dry materials are basically the same, which confirms previous indications that the main effect of heating these materials is just a loss of water. We suggest that in the hydrated state the structure of these materials is built of dimers of thio-hydroxogermanate anions, with the water molecules acting, as bridges between such dimers. In the dehydrated structure,. file thio-hydroxogermanate anions instead form an extended network- through the formation of interdimer hydrogen bonds through the -OH groups in the structure. The alkali ions are suggested to act as "space-fillers" in voids formed by the thio-hydroxogermanate anion dimers. in both the hydrated and the dehydrated state.},
  author       = {Karlsson, Maths and Matic, Aleksandar and Panas, Itai and Bowron, Daniel T. and Martin, Steve W. and Nelson, Carly R. and Martindale, Chad A. and Hall, Andreas and Borjesson, Lars},
  issn         = {0897-4756},
  language     = {eng},
  number       = {19},
  pages        = {6014--6021},
  publisher    = {The American Chemical Society},
  series       = {Chemistry of Materials},
  title        = {Structure of Proton-Conducting Alkali Thio-Hydroxogermanates},
  url          = {http://dx.doi.org/10.1021/cm8006155},
  volume       = {20},
  year         = {2008},
}