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Pressure-induced structural transitions in MOO3·xH2O (x = 1/2, 2) molybdenum trioxide hydrates : a raman study

Liu, Dan, Lei, Weiwei, Chen, Xiaohui, Hao, Jian, Jin, Yunxia, Cui, Qiliang and Zou, Guangtian 2009, Pressure-induced structural transitions in MOO3·xH2O (x = 1/2, 2) molybdenum trioxide hydrates : a raman study, Journal of physical chemistry B, vol. 113, no. 52, pp. 16479-16482, doi: 10.1021/jp906423w.

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Title Pressure-induced structural transitions in MOO3·xH2O (x = 1/2, 2) molybdenum trioxide hydrates : a raman study
Formatted title Pressure-induced structural transitions in MOO3·xH2O (x = 1/2, 2) molybdenum trioxide hydrates : a raman study
Author(s) Liu, DanORCID iD for Liu, Dan orcid.org/0000-0001-6875-419X
Lei, WeiweiORCID iD for Lei, Weiwei orcid.org/0000-0003-2698-299X
Chen, Xiaohui
Hao, Jian
Jin, Yunxia
Cui, Qiliang
Zou, Guangtian
Journal name Journal of physical chemistry B
Volume number 113
Issue number 52
Start page 16479
End page 16482
Total pages 4
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2009
ISSN 1520-6106
1520-5207
Summary The high-pressure behaviors of MOO3·1/2H2O and MOO3·2H2O have been investigated by Raman spectroscopy in a diamond anvil cell up to 31.3 and 30.3 GPa, respectively. In the pressure range up to around 30 GPa, both MOO3·1/2H2O and MOO3·2H2O undergo two reversible structural phase transitions. We observed a subtle structural transition due to O−H···O hydrogen bond in MOO3·1/2H2O at 3.3 GPa. We found a soft mode phase transition in MOO3·2H2O at 6.6 GPa. At higher pressures, a frequency discontinuity shift and appearance of new peaks occurred in both MOO3·1/2H2O and MOO3·2H2O, indicating that the second phase transition is a first-order transition. The frequency redshift of the O−H stretching bands of MOO3·1/2H2O and MOO3·2H2O are believed to be related to the enhancement of the O−H···O weak hydrogen bonds under high pressures.
Language eng
DOI 10.1021/jp906423w
Field of Research 020406 Surfaces and Structural Properties of Condensed Matter
029904 Synchrotrons
020503 Nonlinear Optics and Spectroscopy
Socio Economic Objective 970102 Expanding Knowledge in the Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2009, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30047831

Document type: Journal Article
Collection: Institute for Frontier Materials
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