Infrared spectroscopy of Sc{sup +}(H{sub 2}O) and Sc{sup 2+}(H{sub 2}O) via argon complex predissociation: The charge dependence of cation hydration

Journal Article · Fri Jan 07 00:00:00 EST 2011 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.3515425· OSTI ID:21559969

Carnegie, P D; Bandyopadhyay, B; Duncan, M A ^[1]

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1. Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556 (United States)

Singly and doubly charged scandium-water ion-molecule complexes are produced in a supersonic molecular beam by laser vaporization. These ions are mass analyzed and size selected in a specially designed reflectron time-of-flight spectrometer. To probe their structure, vibrational spectroscopy is measured for these complexes in the O-H stretching region using infrared laser photodissociation and the method of rare gas atom predissociation, also known as ''tagging.'' The O-H stretches in these systems are shifted to lower frequency than those for the free water molecule, and the intensity of the symmetric stretch band is strongly enhanced relative to the asymmetric stretch. These effects are more prominent for the doubly charged ions. Partially resolved rotational structure for the Sc{sup +}(H{sub 2}O)Ar complex shows that the H-O-H bond angle is larger than it is in the free water molecule. Fragmentation and spectral patterns indicate that the coordination of the Sc{sup 2+} ion is filled with six ligands (one water and five argons).

• OSTI ID: 21559969
• Journal Information: Journal of Chemical Physics, Vol. 134, Issue 1; Other Information: DOI: 10.1063/1.3515425; (c) 2011 American Institute of Physics; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
ARGON
ARGON COMPLEXES
ATOM-MOLECULE COLLISIONS
BOND ANGLE
CATIONS
HYDRATION
INFRARED SPECTRA
ION-MOLECULE COLLISIONS
MOLECULAR BEAMS
MOLECULES
PHOTOLYSIS
PHOTON-MOLECULE COLLISIONS
PREDISSOCIATION
ROTATIONAL STATES
SCANDIUM
SCANDIUM IONS
TIME-OF-FLIGHT SPECTROMETERS
VIBRATIONAL STATES
WATER
ATOM COLLISIONS
BEAMS
CHARGED PARTICLES
CHEMICAL REACTIONS
COLLISIONS
COMPLEXES
DECOMPOSITION
DISSOCIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HYDROGEN COMPOUNDS
ION COLLISIONS
IONS
MEASURING INSTRUMENTS
METALS
MOLECULE COLLISIONS
NONMETALS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTON COLLISIONS
RARE GASES
SOLVATION
SPECTRA
SPECTROMETERS
SPECTROSCOPY
TRANSITION ELEMENTS