Vanadyl(FV) Phosphonates, VOCnH2n+1PO3•xH2O (n = 0-4, x = 1 or 1.5), as Precursors of Vanadyl(IV) Pyrophosphate, (VO)2P2O7

V. V. Guliants, Jay Burton Benziger, Sankaran Sundaresan, I. E. Wachs, J. M. Jehng

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Vanadyl(IV) phosphonates with the formula VOCnH2n+1PO3•xH2O (n = 0-4, x = 1 or 1.5) have been synthesized in organic medium by reaction of V2O5 with the corresponding phosphonic acid. The low-temperature magnetic susceptibility of vanadyl(IV) phosphite (n = 0) and n-butylphosphonate (n = 4) was indicative of antiferromagnetically exchangecoupled V2O9 vanadyl dimers similar to previously reported results for n = 1-3 phosphonates and vanadyl(IV) hydrogen phosphate hemihydrate (VOHPO4•0.5H2O). Raman spectroscopy of vanadyl(IV) phosphonates (n = 0-4) also suggested the similar local crystalline order in these solids. The close structural relationship between these phosphonates and VOHPO4•0.5H2O is further substantiated by the thermal transformation of the former phases in the presence of oxygen into vanadyl(IV) pyrophosphate. Kinetic measurements of the n-butane selective oxidation to maleic anhydride demonstrated that vanadyl methylphosphonate (n = 1) and phoshite (n = 0) produced vanadyl pyrophosphate catalysts with comparable (the methylphosphonate) and even superior performance (vanadyl phosphite) compared to the conventional unpromoted vanadium - phosphorus - oxide (VPO) catalyst.

Original languageEnglish (US)
Pages (from-to)1493-1498
Number of pages6
JournalChemistry of Materials
Volume7
Issue number8
DOIs
StatePublished - Aug 1995

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Vanadyl(FV) Phosphonates, VOC<sub>n</sub>H<sub>2n+1</sub>PO<sub>3</sub>•xH<sub>2</sub>O (n = 0-4, x = 1 or 1.5), as Precursors of Vanadyl(IV) Pyrophosphate, (VO)<sub>2</sub>P<sub>2</sub>O<sub>7</sub>'. Together they form a unique fingerprint.

Cite this