INFRARED PHOTODISSOCATION SPECTROSCOPY OF ALUMINUM BENZENE CATION COMPLEXES

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\chem{Al^{+}-bz} and \chem{Al^{+}-bz_{2}} complexes are produced in a laser vaporization/supersonic expansion source. These complexes are mass selected and their infrared spectra (700-4500 \wn) are taken using infrared laser photodissociation spectroscopy via the argon tagging method. DFT on both complexes is carried out to obtain the structures and vibrational frequencies. The \chem{CH} stretch and fingerprint regions of both complexes are compared to theory and the free benzene spectrum. The far infrared spectrum of \chem{Al^{+}-bz} (700-1800 \wn ) is compared to the previous spectrum collected using IR-MPD and significant differences in linewidth and line position are observed. The structure of \chem{Al^{+}-bz_{2}} indicated by the vibrational band patterns is investigated and compared to theory, which predicts an asymmetric structure.

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Author Institution: Department of Chemistry, University of Georgia, Athens, GA 30602-2256.

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