Doped Keggin heteropolyacids as catalysts in sulfide oxidation
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In this research, we report the preparation of doped PMo Keggin heteropolyacids where Mo is partially replaced by V, Bi, and Bi–V. These catalysts were characterized by means of ICP-AES analysis, 31P-NMR, UV–visible spectra, FT-IR spectra, thermal analysis, and textural properties. In addition, the activities of the synthesized catalysts were evaluated in the selective oxidation of sulfides to sulfoxides/sulfones. The incorporation of V, Bi and Bi–V into the structure of H3PMo12O40 increases the catalytic activity. The two most active catalysts, those with V and V–Bi were supported on aminopropyl-functionalized silica (SiO2NH2) and they were found to be and efficient heterogeneous catalysts for the selective oxidation of diphenylsulfide to the corresponding sulfoxide/sulfone.
KeywordsDoped Keggin heteropolyacids Sulfide oxidation Bulk and supported catalysts Sulfoxides Sulfones
The authors thank E. Soto and D. Peña for their experimental contribution to the measurements of S BET and GC, respectively. The authors thank CONICET, ANPCyT and UNLP for their financial support. AGS, PGV, HJT and GPR are members of CONICET.
- 3.Bennardi D, Romanelli G, Autino J, Pizzio L, Vázquez P, Cáceres C, Blanco M (2010) React Kinet Mech Catal 100:165–174Google Scholar
- 4.Romanelli G, Autino P, Vázquez P, Pizzio L, Blanco M, Cáceres C (2003) Appl Catal A 352:208–213Google Scholar
- 20.Barrett A, Carr R, Attwood S, Richardson G, Walshe N (1986) J Org Chem 51:4840–4856Google Scholar
- 21.Varma R, Sain R, Meshram H (1997) Tetrahedron Lett 8:625–628 and references cited hereinGoogle Scholar