Chemical implantation df palladium(II) has been carried but under mild conditions by reacting trans-Pd(O2CNEt2)(2)(NHEt2)(2) with the silanol groups of amorphous silica, carbon-dioxide and secondary amine being released in the process. The palladium-containing silica has been characterized and the coordination environment of the implanted cation has been defined by C-13 CP MAS NMR, DRIFT and-XPS spectra, and by WAXS measurements. Silica-bonded palladium(II) was reduced thermally in. vacuo or with dihydrogen at room temperature. Catalytic activity in the hydrogenation of cyclohexene was found for all samples containing the silica-supported reduced palladium; the best results, with rates independent of olefin concentration, were found for the samples treated thermally (200 degrees C) under reduced pressure.
N,N- Dialkylcarbamato complexes as precursores for the chemical implantation of metal cations on a silica support. Part III. Palladium(II) and its further reduction to palladium nanoparticles / L., Abis; Belli, Dell’Amico; C., Busetto; F., Calderazzo; Caminiti, Ruggero; F., Garbassi; A., Tomei. - In: JOURNAL OF MATERIALS CHEMISTRY. - ISSN 0959-9428. - STAMPA. - 12:(1998), pp. 2855-2861. [10.1039/a804456b]
N,N- Dialkylcarbamato complexes as precursores for the chemical implantation of metal cations on a silica support. Part III. Palladium(II) and its further reduction to palladium nanoparticles
CAMINITI, Ruggero;
1998
Abstract
Chemical implantation df palladium(II) has been carried but under mild conditions by reacting trans-Pd(O2CNEt2)(2)(NHEt2)(2) with the silanol groups of amorphous silica, carbon-dioxide and secondary amine being released in the process. The palladium-containing silica has been characterized and the coordination environment of the implanted cation has been defined by C-13 CP MAS NMR, DRIFT and-XPS spectra, and by WAXS measurements. Silica-bonded palladium(II) was reduced thermally in. vacuo or with dihydrogen at room temperature. Catalytic activity in the hydrogenation of cyclohexene was found for all samples containing the silica-supported reduced palladium; the best results, with rates independent of olefin concentration, were found for the samples treated thermally (200 degrees C) under reduced pressure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
