Plastic crystal behaviour in tetraethylammonium dicyanamide

Annat, Gary, Adebahr, Josefina, McKinnon, Ian R., MacFarlane, Douglas R. and Forsyth, Maria 2007, Plastic crystal behaviour in tetraethylammonium dicyanamide, Solid state ionics, vol. 178, no. 15-18, pp. 1065-1071, doi: 10.1016/j.ssi.2007.04.015.

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Title Plastic crystal behaviour in tetraethylammonium dicyanamide
Author(s) Annat, Gary
Adebahr, Josefina
McKinnon, Ian R.
MacFarlane, Douglas R.
Forsyth, MariaORCID iD for Forsyth, Maria
Journal name Solid state ionics
Volume number 178
Issue number 15-18
Start page 1065
End page 1071
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2007-06-11
ISSN 0167-2738
Keyword(s) plastic crystal
Summary The plastic crystal tetraethylammonium dicyanamide ([N2,2,2,2][dca]) has been investigated with an emphasis on structure and dynamics in the plastic phase. It was found that almost all of the volume expansion occurs at the II → I transition, with no volume expansion at the melt transition (as normally observed for crystals). The conductivity of this material shows a rapid increase at temperatures below the II → I transition, reaching values ~ 10− 3 S/cm in Phase I, and 0.1 S/cm in the melt. The NMR measurements show that there is a sudden onset of rotational motions of the cations at the plastic transition; below this temperature the cations appear static. The rotational motion of the cation in Phase I has been discussed in terms of isotropic tumbling.
Language eng
DOI 10.1016/j.ssi.2007.04.015
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, Elsevier B.V.
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