Vibrational Spectroscopy of CO in Gas-Phase Rhodium Cluster−CO Complexes

• Published in: Journal of the American Chemical Society Vol. 125; no. 37; pp. 11184 - 11185
• Main Authors: Fielicke, André, von Helden, Gert, Meijer, Gerard, Simard, Benoit, Dénommée, Stéphane, Rayner, David M
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 17-09-2003
• Subjects: Atomic and molecular physics; Exact sciences and technology; Molecular properties and interactions with photons; Molecular spectra; Physics; Vibrational analysis; Rhodium Carbonyls Complexes; Infrared spectroscopy; Transition elements Carbonyls Complexes; Platinoid Carbonyl Complexes; Vibrational analysis; Polynuclear complex; Multi-photon processes; Experimental study
• ISSN: 0002-7863; 1520-5126
• DOI: 10.1021/ja036897s

Infrared spectra of isolated unsaturated rhodium cluster−CO complexes in the region of the CO stretching vibration, ν(CO), are measured using a molecular beam depletion technique. These spectra provide benchmarks for interpreting values of ν(CO) that are found when CO is used to probe Rh surfaces and supported Rh nanoparticles. Supported nanoparticles have shifts of ν(CO) of as much as +100 cm-1 compared to the free clusters measured here, indicative of significant charge transfer to the support.