Infrared Spectroscopy Of The Co<sup>+</sup>(h<sub>2</sub>o) Complex With He, Ne, And Ar Tagging.
Marks, Joshua H
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https://hdl.handle.net/2142/111505
Description
Title
Infrared Spectroscopy Of The Co+(h2o) Complex With He, Ne, And Ar Tagging.
Author(s)
Marks, Joshua H
Contributor(s)
Duncan, Michael A
Miliordos, Evangelos
Issue Date
2021-06-24
Keyword(s)
Action spectroscopy (incl. PE, PD, PI, LIR)
Abstract
Cobalt cation-water complexes are generated in a pulsed supersonic expansion by laser vaporization. Complexes are mass-selected in a time-of-flight mass spectrometer and their spectra are measured using infrared laser photodissociation of the rare gas tagged complexes. The spectrum of Co$^{+}$(H$_{2}$O) was measured with He, Ne, and Ar$_{3}$ tags. These spectra reveal that the water remains intact in the metal cation-water complex. The Ar$_{3}$ tag is found to cause a small blue shift of the O-H stretches relative to that observed with helium tagging. Rotational structure observed for Co$^{+}$(H$_{2}$O) and Co$^{+}$(D$_{2}$O) with helium tagging reveal perturbations to the rotational constants introduced by the motion of the helium in the ground vibrational state. Nuclear spin statistics were found to maintain a room temperature population of states which indicates an antisymmetric ground electronic state. Spin-rotation coupling was observed to vary between isotopologues and differed from values obtained in untagged measurements.
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