INFRARED SPECTROSCOPY OF N$_2$O CLUSTERS
MetadataShow full item record
Publisher:Ohio State University
Following our observation of the polar dimer of OCS, we searched the region of the N-N stretching fundamental of N$_2$O using a tunable diode laser to probe a pulsed supersonic slit jet. In addition to the relatively strong $\nu_3$ band of the centrosymmetric lowest energy isomer of N$_2$O dimer, we observed a weak band at around 2226.45 cm-1 which we have assigned to the higher energy polar isomer of N$_2$O dimer. 140 transitions from an a/b type hybrid band were assigned and fitted to a planar asymmetric top structure. Our lower state parameters should enable the observation of the microwave spectrum of polar (N$_2$O)$_2$. A trimer band of N$_2$O has also been assigned based on lower state combination differences from previously published works. In contrast to OCS where we have observed four tetramer bands, only one tetramer band around 2237.4 cm-1 has been found to date. This band is best described as an asymmetric top with an accidental spherical top structure. Isotopic studies of these bands are presently underway.
Author Institution: Department of Physics and Astronomy, 2500 University Drive NW, Calgary,; Alberta T2N 1N4, Canada; Steacie Institute for Molecular Sciences, National Research Council of Canada,; Ottawa, Ontario K1A 0R6, Canada