Multielement NMR studies of the liquid-liquid phase separation and the metal-to-nonmetal transition in fluid lithium- and sodium-ammonia solutions

Lodge, Matthew T. J. H., Cullen, P., Rees, Nicholas H., Spencer, Neil, Maeda, Kiminori, Harmer, Jeffrey R., Jones, Martin O. and Edwards, Peter P. (2013) Multielement NMR studies of the liquid-liquid phase separation and the metal-to-nonmetal transition in fluid lithium- and sodium-ammonia solutions. Journal of Physical Chemistry B, 117 42: 13322-13334. doi:10.1021/jp404023j


Author Lodge, Matthew T. J. H.
Cullen, P.
Rees, Nicholas H.
Spencer, Neil
Maeda, Kiminori
Harmer, Jeffrey R.
Jones, Martin O.
Edwards, Peter P.
Title Multielement NMR studies of the liquid-liquid phase separation and the metal-to-nonmetal transition in fluid lithium- and sodium-ammonia solutions
Journal name Journal of Physical Chemistry B   Check publisher's open access policy
ISSN 1520-6106
1520-5207
Publication date 2013
Sub-type Article (original research)
DOI 10.1021/jp404023j
Volume 117
Issue 42
Start page 13322
End page 13334
Total pages 13
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2014
Language eng
Subject 1606 Political Science
2505 Materials Chemistry
2508 Surfaces, Coatings and Films
Abstract 1H, 7Li, 14N, and 23Na high resolution nuclear magnetic resonance (NMR) measurements are reported for fluid solutions of lithium and sodium in anhydrous liquid ammonia across the metal-to-nonmetal transition (MNM transition), paying particular attention to the phenomenon of liquid-liquid phase separation which occurs in the composition/temperature region close to the MNM transition. Our results are discussed in terms of the electronic structure of fluid metal-ammonia solutions at low temperatures (ca. 240 K). We find that the electronic phase transition to the metallic state in these solutions, especially at temperatures close to the liquid-liquid critical consolute temperature, occurs from a nonmetallic, electrolytic solution containing a predominance of electron spin-paired, (diamagnetic) charged bosonic states. The possible implications of these observations to the nature of the liquid-liquid phase separation are discussed, both from the views of N. F. Mott, regarding the MNM transition in sodium-ammonia solutions, and those of R. A. Ogg, regarding the possibility of high-temperature superconductivity in these solutions. Similarities between the electronic structure of metal-ammonia solutions and the high-temperature cuprate superconductors are also briefly emphasized.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Centre for Advanced Imaging Publications
 
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