Collision-induced dissociation of Co[sup +][sub [ital n]] ([ital n]=2--18) with Xe: Bond energies of cationic and neutral cobalt clusters, dissociation pathways, and structures

Journal Article · Sat Jan 15 04:00:00 EST 1994 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.466636· OSTI ID:5284987

Hales, D A; Su, C; Lian, L; Armentrout, P B ^[1]

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1. Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 (United States)

The kinetic energy dependence of collision-induced dissociation (CID) of Co[sup +][sub [ital n]] ([ital n]=2--18) with xenon is studied by using a guided ion beam mass spectrometer. Examination of the general dissociation behavior over a broad collision energy range shows that cobalt cluster cations dissociate exclusively by loss of single atoms (cluster evaporation''), with no evidence found for elimination of molecular cluster fragments. Bond dissociation energies for cobalt cluster cations, Co[sup +][sub [ital n]] ([ital n]=2--18), are determined from measurements of the CID thresholds. Bond energies for neutral cobalt clusters, Co[sub [ital n]] ([ital n]=4--18), are derived by combining these cationic bond energies with ionization energies for Co[sub [ital n]] from the literature. The dependence of binding energy on cluster size is similar to that observed for iron clusters, and inspires some speculation regarding cluster ion structures.

• OSTI ID: 5284987
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 100:2; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664500* -- Special Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BEAMS
BINDING ENERGY
CATIONS
CHARGED PARTICLES
COBALT IONS
COLLISIONS
DISSOCIATION
ELEMENTS
ENERGY
ENERGY DEPENDENCE
FLUIDS
GASES
ION BEAMS
ION COLLISIONS
ION PAIRS
ION-ATOM COLLISIONS
IONS
KINETIC ENERGY
MASS SPECTROMETERS
MEASURING INSTRUMENTS
NONMETALS
RARE GASES
SIZE
SPECTROMETERS
STRUCTURE FACTORS
XENON