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IGOR V. TRETIAKOV AND JOHN R. CABLE, Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403.
The vibrationally resolved electronic spectra of diphenylamine and several isotopically subsituted derivatives were recorded using two-photon ionization under supersonic jet expansion conditions. Spectral evidence is consistent with the equivalence of the two phenyl rings which suggests a C2 symmetry ground state in which the central nitrogen atom is in a planar configuration. Analysis of the spectrum of diphenylamine clustered with water shows that the solvent has a large influence on the chromophore structure. This contrasts with the observations obtained for diphenylamine clustered with inert gases and nitrogen.