Solid-state crystal-to-crystal phase transitions and reversible structure-temperature behavior of phosphovanadomolybdic acid, H5PV2Mo10O40

Delina Barats-Damatov, Linda J W Shimon, Yishay Feldman, Tatyana Bendikov, Ronny Neumann

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The crystal packing and secondary structure of H5PV2Mo12O40 was followed by careful X-ray diffraction studies that revealed four unique structures and three solid phase transitions at temperatures between 25 and 55 °C, with loss of solvated water and concomitant contraction of the volume and increase of the packing density. Above 60 °C H5PV2Mo12O40 becomes amorphous and then anhydrous although the polyoxometalate cluster is stable indefinitely up to 300 °C. Above this temperature, combined IR, Raman, XRD, and XPS measurements show the decomposition of H5PV2Mo12O40 to crystalline MoO3 and probably amorphous vanadium oxide and vanadylphosphate, the latter appearing to cover the surface of MoO3. Importantly, H5PV2Mo12O40 can be easily recovered by dissolution in water at 80 °C.

Original languageEnglish
Pages (from-to)628-634
Number of pages7
JournalInorganic Chemistry
Volume54
Issue number2
DOIs
Publication statusPublished - Jan 20 2015

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Phase transitions
solid state
Vanadium
Crystals
acids
Acids
vanadium oxides
Water
packing density
Oxides
water
contraction
crystals
solid phases
dissolving
Dissolution
X ray photoelectron spectroscopy
Crystalline materials
Decomposition
decomposition

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Solid-state crystal-to-crystal phase transitions and reversible structure-temperature behavior of phosphovanadomolybdic acid, H5PV2Mo10O40 . / Barats-Damatov, Delina; Shimon, Linda J W; Feldman, Yishay; Bendikov, Tatyana; Neumann, Ronny.

In: Inorganic Chemistry, Vol. 54, No. 2, 20.01.2015, p. 628-634.

Research output: Contribution to journalArticle

Barats-Damatov, Delina ; Shimon, Linda J W ; Feldman, Yishay ; Bendikov, Tatyana ; Neumann, Ronny. / Solid-state crystal-to-crystal phase transitions and reversible structure-temperature behavior of phosphovanadomolybdic acid, H5PV2Mo10O40 In: Inorganic Chemistry. 2015 ; Vol. 54, No. 2. pp. 628-634.
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