Infrared multiple photon dissociation spectroscopy of transition metal oxide cluster cations期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Infrared multiple photon dissociation spectroscopy of transition metal oxide cluster cations

Authors:	A. Fielicke G. Meijer G. von Helden

Affiliation:	(1) FOM Institute for Plasma Physics Rijnhuizen, Edisonbaan 14, 3439 MN Nieuwegein, The Netherlands;(2) Department of Molecular and Laser Physics, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands;(3) Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany

Abstract:	Infrared spectra in the range of 530–1400cm^–1 are presented for tantalum oxidecluster cations ${rm{Ta}}_x {rm{O}}_y^ +$ (x = 3, 4 and 6). These spectra areobtained via multiple photondissociation (MPD) spectroscopy of free cluster cations movingin a molecular beam. The IR spectra for ${rm{Ta}}_x {rm{O}}_y^ +$ are compared to spectra of ${rm{Nb}}_x {rm{O}}_y^ +$ as well as to the experimental dataavailable for vanadium oxide cluster cations from IR-MPDspectroscopy. For ${rm{Ta}}_x {rm{O}}_y^ +$ and ${rm{Nb}}_x {rm{O}}_y^ +$ the IR spectra exhibit very strongsimilarities (including the band positions), whereas absorptionbands in ${rm{V}}_x {rm{O}}_y^ +$ are relatively blue-shifted byabout 20–40 cm^–1.

Keywords:	36.40.-c Atomic and molecular clusters 61.46.+w Nanoscale materials: clusters, nanoparticles,nanotubes, and nanocrystals 82.80.Gk Analytical methods involving vibrationalspectroscopy
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