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

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Infrared multiple photon dissociation spectroscopy of transition metal oxide cluster cations

Authors:	A Fielicke G Meijer and G von Helden

Institution:	(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 530–1400 cm^–1 are presented for tantalum oxide cluster cations ${\rm{Ta}}_x {\rm{O}}_y^ +$ (x = 3, 4 and 6). These spectra are obtained via multiple photon dissociation (MPD) spectroscopy of free cluster cations moving in 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 data available for vanadium oxide cluster cations from IR-MPD spectroscopy. For ${\rm{Ta}}_x {\rm{O}}_y^ +$ and ${\rm{Nb}}_x {\rm{O}}_y^ +$ the IR spectra exhibit very strong similarities (including the band positions), whereas absorption bands in ${\rm{V}}_x {\rm{O}}_y^ +$ are relatively blue-shifted by about 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 vibrational spectroscopy
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