Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

MO: Molekülphysik

MO 2: Clusters I: Metal Clusters (joint session A and MO)

MO 2.4: Vortrag

Montag, 2. April 2001, 16:30–16:45, H1012

Sequential oxygen and metal atom addition in yttrium cluster anions: a comprehensive photoelectron spectroscopic study — •Axel Pramann1, Atsushi Nakajima1, and Koji Kaya21Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan — 2Institute of Molecular Science, Myodaiji, Okazaki, 444-8585, Japan

Axel Pramann, Atsushi Nakajima

Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522 Japan

Koji Kaya

Insitute of Molecular Science, Myodaiji, Okazaki, 444-8585, Japan

The evolution of the electronic structure of small yttrium oxide cluster anions is studied using the laser vaporization technique for cluster generation and photodetachment photoelectron spectroscopy (PES) of mass selected gas phase cluster anions.

PES experiments are performed at three wavelengths: 532 nm, 355 nm, and 266 nm. Generally, electron binding energies (BE) are increasing with increasing number of y atoms per cluster as well as with increasing oxidation state of yttrium.

Low BE main spectral features are contributed from metal d-band orbitals whereas the O 2p contribution is less dominant in the observed energy range. The different behavior of molecular and dissociative chemisorption of oxygen with respect to cluster size is discussed in terms of electronic structures and both sequential oxygen and metal atom addition to the preceding cluster.


This document was translated from LATEX by HEVEA.
100% | Bildschirmansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2001 > Berlin