K. Takeuchi, M. Salmeron, G. A. Somorjai
Dec 15, 1992
Citations
0
Influential Citations
15
Citations
Journal
Surface Science
Abstract
Abstract Temperature-programmed desorption (TPD) studies of diethers: diethoxymethane (CH3CH2OCH2OCH2CH3), 1,2-diethoxyethane (CH3CH2OCH2CH2OCH2CH3), and perfluoro-1,2-diethoxyethane are carried out on ZrO2 thin films epitaxially grown on a Pt(111) single crystal and on clean Pt(111). The hydrogenated diethers adsorb strongly on both surfaces through the O-lone pair orbital. On the ZrO2 film the adsorption is reversible while on Pt(111) the strongly bound species decompose upon heating. The perfluorinated compound adsorbs reversibly on both substrates. The binding energies of molecular multilayers and monolayers correlate well with the heats of vaporization and with chain length or polarizability of the adsorbates.