Electron paramagnetic resonance investigations of CO adsorption on RuY zeolite

• Autorzy: Blasco, T. , Bonneviot, L. , Li, X. W. , Che, M. , Chaquin, P. , Clerjaud, B. , Sojka, Z.
• Języki publikacji: EN

Abstrakty

EN

The adsorption of carbon monoxide onto ruthenium exchanged into NaY zeolite has been investigated by CW-EPR techniques using (13) C-enriched CO. A low spin eta (1){Ru(3cCO}(5) adduct with g = 2.065, g\\ = 1.987 and |A((99)Ru) = 1.3 mT, |A||(99)Ru) = 1.7 mT, |A_|(101 Ru) = 1.5 mT, A||(101)Ru) = 1.9 mT and |A|(13)C) = 6.0, |A|| |(13)C) = 6.8 mT has been identified. The magnetic parameters have been analyzed in terms of the molecular structure and spin density distribution. The results are consistent with an apical coordination of CO and the bonding established by the overlap between d(z)z2 and 5 sigma orbitals. The eta{RuIII (3c)CO}(5) adduct can be classified as a a metal-centred radical located in SIl'/SII sites. The spin density on Ru is equal to 0.6 and is confined mainly to the dz(2) orbital and 0.1 on carbon atom of the CO ligand.

Słowa kluczowe

PL

elektronowy rezonans paramagnetyczny; adsorpcja; tlenek węgla; zeolit

EN

EPR; adsorption; carbon monooxide; zeolite

• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2002
• Tom: Vol. 50, No. 2
• Strony: 267-279
• Opis fizyczny: Bibliogr. 31 poz.

Twórcy

autor

Blasco, T.

autor

Bonneviot, L.

autor

Li, X. W.

autor

Che, M.

autor

Chaquin, P.

autor

Clerjaud, B.

autor

Sojka, Z.

• Laboratoire de Reactivite de Surface UMR 7609-CNRS, Universite Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France