Measurement of the. nu. sub 8 intermolecular vibration of (D sub 2 O) sub 2 by tunable far infrared laser spectroscopy

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.462084· OSTI ID:5078456

Pugliano, N; Saykally, R J ^[1]

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1. Department of Chemistry, University of California, Berkeley, Berkeley, California 94720 (United States)

The first accurate measurement of an intermolecular vibration of the water dimer is reported. Five vibration--rotation-tunneling (VRT) bands of the perdeuterated isotope, located near 84 cm{sup {minus}1}, have been assigned to the {ital A}{sub 1}/{ital E}/{ital B}{sub 1} tunneling components of the {ital K}{sub {ital a}}=0{l arrow}0 and {ital K}{sub {ital a}}=1{l arrow}0 subbands. The vibration involves large amplitude motion of the hydrogen bond acceptor and is assigned as the {nu}{sub 8} acceptor wag. The spectra indicate strong coupling of both the donor--acceptor interconversion and donor tunneling motions to the excited vibrational coordinate. This measurement provides a benchmark for future efforts toward the determination of an accurate potential energy surface for the water dimer.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5078456
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 96:3; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664100* -- Theory of Electronic Structure of Atoms & Molecules-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
DIMERS
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY LEVELS
EXCITED STATES
FAR INFRARED RADIATION
HEAVY WATER
HYDROGEN COMPOUNDS
INFRARED RADIATION
LASER SPECTROSCOPY
OXYGEN COMPOUNDS
POTENTIAL ENERGY
RADIATIONS
SPECTROSCOPY
TUNING
TUNNEL EFFECT
VIBRATIONAL STATES
WATER