Isotope effects in the infrared spectra of the polar and nonpolar isomers of N2O dimer

Microwave spectrum and structure of the polar N2O dimer

“…The species were identified using rotationally-resolved infrared spectroscopy to reveal polar structures in slipped-parallel geometries. A further study of two isotopologues of (N 2 O) 2 by rotationally-resolved infrared spectroscopy has since allowed a more complete determination of the molecular structure [21]. The determined parameters are in agreement with the results of a recent ab initio study [22].…”

“…Owing to the limited quantity of available sample, measurements were focussed on selected transitions that allowed key parameters to be determined. The use of a gas sample containing >95% helium has previously been found to be essential for the observation of polar dimers of OCS and N 2 O [19][20][21]23].…”

High-resolution infrared spectroscopy of carbon dioxide dimers, trimers, and larger clusters

“…All the spectra were recorded by direct absorption using a rapid-scan tuneable diode laser spectrometer at The University of Calgary, as described previously [33][34][35][36]. Wavenumber calibration was ensured by simultaneously recording signals from a fixed etalon and a room temperature reference gas cell, which was usually filled with CO 2 or N 2 O. Spectra were assigned, simulated, and fitted using Colin Western's computer program PGOPHER [37].…”

Ubiquitous T-shaped isomers of OCS-hydrocarbon van der Waals complexes

“…The experiments are performed using a pulsed supersonic jet expansion of a dilute mixture of OCS and C 2 H 2 in helium carrier gas. Spectra are observed by direct absorption using a tunable diode laser, [5][6][7][8] and simulated using Colin…”