부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jcat.2004.10.018 Byline: P. Centomo (a), M. Zecca (a), S. Lora (b), G. Vitulli (c), A.M. Caporusso (d), M.L. Tropeano (e), C. Milone (e), S. Galvagno (e), B. Corain (a)(f) Keywords: Nanoclustered platinum(0); Functional resins; Selective hydrogenation; [alpha] , [beta] -Unsaturated aldehyde Abstract: Nanoclustered Pt.sup.0 catalysts based on cross-linked macromolecular matrices are evaluated in the hydrogenation of an [alpha],[beta]-unsaturated aldehyde (citral). Matrices and catalysts are characterized by inverse steric exclusion chromatography, scanning electron microscopy, X-ray microprobe analysis, and transmission electron microscopy. The monometallic catalysts exhibit remarkable selectivity for geraniol/nerol when 2-3-nm, regularly shaped, spherical metal nanoclusters are deposited on the supports from solutions of solvated platinum atoms prepared by metal vapor synthesis (MVS). The immobilization in the polymer framework of ions of a second metal such as Fe(II), Co(II), or Zn(II) enhances the selectivity of the Pt catalysts by up to more than 90%. Author Affiliation: (a) Dipartimento di Scienze Chimiche, Via Marzolo 1, 35131 Padova, Italy (b) Istituto per la Sintesi Organica e la Fotoreattivita, C.N.R., via Romea 4, 35020 Legnaro, Italy (c) Istituto di Chimica dei Composti Organometallici, c/o Dipartimento di Chimica e di Chimica Industriale Via Risorgimento 35, 56126 Pisa, Italy (d) Dipartimento di Chimica e di Chimica Industriale Via Risorgimento 35, 56126 Pisa, Italy (e) Dipartimento di Chimica Industriale, Salita Sperone 31, 98166 Messina, Italy (f) Istituto di Scienze e Tecnologie Molecolari, C.N.R., Sezione di Padova c/o Dipartimento di Scienze Chimiche, Via Marzolo 1, 35131 Padova, Italy Article History: Received 23 July 2004; Revised 5 October 2004; Accepted 6 October 2004