Complexes of Palladium(II) and Platinum(II) with the PW11 O397- Heteropolyanion as Catalytically Active Species in Benzene Oxidation Full article
| Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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| Output data | Year: 1996, Volume: 114, Number: 1-3, Pages: 131-139 Pages count : 9 DOI: 10.1016/S1381-1169(96)00311-1 | ||
| Tags | Benzene oxidation, Heteropolytungstate, Hydrogen, Oxygen, Pallalium complexes, Platinum complexes | ||
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| Affiliations |
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Funding (2)
| 1 | International Science Foundation | RP-5300 |
| 2 | Russian Foundation for Basic Research | 95-03-08754 |
Abstract:
Aqueous solutions prepared from Pd(H2O)2+4 and PtCl2−4 with heteropolytungstate PW11O7−39 at the Pd(II) or Pt(II) to PW11 ratio from 1 to 8 and pH 2 and 4 have been characterized by means of UV-VIS and IR spectroscopy and 31P and 195Pt NMR. Three types of complexes have been detected in Pd(II) containing solutions. Two of them, [PW11O39Pd] (1) and [PW11O39Pd-O-PdO39W11P] (2) had sharp peaks at δ1 −13.2 and δ2 −12.8 ppm in 31P NMR spectra. Possessing a broad signal at about − 13 ppm, complex (3) represented a water-soluble oligomeric Pd(II) hydroxide stabilized by the heteropolytungstate. The complex of type (1) (PW11O39Pt) was predominant in solutions of Pt(II). The Pd(II) complexes proved capable to catalyze the oxidation of benzene into phenol with a mixture of O2 and H2 gases in a two-phase water-benzene system at the temperature of 10 to 40°C. The yield of phenol for 1 h depended on the Pd(II) to PW11 ratio and on pH and reached a maximum at an Full-size image (<1 K) ratio equal to 2. The catalytic action was attributed mainly to complexes (1) and (2). Under the reaction conditions, these complexes have been found to be reduced into Pd(0) species which readily activate dioxygen and are stabilized in solution by heteropolytungstate. Pt(II) containing systems were one order of magnitude less active than Pd(II) containing ones.
Cite:
Kuznetsova N.I.
, Detusheva L.G.
, Kuznetsova L.I.
, Fedotov M.A.
, Likholobov V.A.
Complexes of Palladium(II) and Platinum(II) with the PW11 O397- Heteropolyanion as Catalytically Active Species in Benzene Oxidation
Journal of Molecular Catalysis A: Chemical. 1996. V.114. N1-3. P.131-139. DOI: 10.1016/S1381-1169(96)00311-1 WOS Scopus РИНЦ ANCAN OpenAlex
Complexes of Palladium(II) and Platinum(II) with the PW11 O397- Heteropolyanion as Catalytically Active Species in Benzene Oxidation
Journal of Molecular Catalysis A: Chemical. 1996. V.114. N1-3. P.131-139. DOI: 10.1016/S1381-1169(96)00311-1 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Published print: | Dec 23, 1996 |
| Published online: | Dec 16, 1999 |
Identifiers:
| Web of science: | WOS:A1996WC26500013 |
| Scopus: | 2-s2.0-0030599606 |
| Elibrary: | 13234145 |
| Chemical Abstracts: | 1996:737388 |
| Chemical Abstracts (print): | 126:95323 |
| OpenAlex: | W2008893708 |