Abstract
Rovibrational spectra of Ar–D2O and Kr–D2O complexes are measured in the v2 bend region of D2O monomer using a tunable mid-infrared diode laser spectrometer. One para and two ortho bands for both complexes are identified and then analyzed in terms of a nearly free internal rotor model. Molecular constants for the excited vibrational states, including band-origin, rotational and centrifugal distortion constants, and Coriolis coupling constant, are determined accurately. A comparison of the observed band-origins of Ar–D2O and Kr–D2O with the previous results of Ne–D2O shows regular trends of shift from Kr–D2O to Ne–D2O.
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