dc.creator Fujita, I. en_US dc.creator Pratt, D. W. en_US dc.date.accessioned 2007-11-20T17:13:16Z dc.date.available 2007-11-20T17:13:16Z dc.date.issued 1995 en_US dc.identifier 1995-TE-11 en_US dc.identifier.uri http://hdl.handle.net/1811/29790 dc.description $^{1}$ Supported by NSF (CHE-9224398). en_US dc.description Author Institution: University of Pittsburgh, Pittsburgh, PA 15260. en_US dc.description.abstract Diethylaniline (DEA) exhibits prominent low frequency activity in its vibrationally resolved $S_{1} \leftarrow S_{0}$ fluorescence excitation spectrum. We report here studies at full rotational resolution of the first three hands in this spectrum which appear within $200 cm^{-1}$ of the origin. The spectra yield rotational constants of the $S_{0}$ and $S_{1}$ states, from which it is shown that the inertial defect $(|\Delta I|)$ increases on $S_{1} \leftarrow S_{0}$ excitation, that $|\Delta I|$ increases with increasing vibrational energy in the S1 state, and that the orientation of the $S_{1} \leftarrow S_{0}$ transition moment is a function of excitation energy, as well. We will deduce from these results and related theoretical calculations the preferred conformation of DEA in its $S_{0}$ and $S_{1}$ states, the nature of the vibrational modes that appear in the $S_{1} \leftarrow S_{0}$ spectra, and the possible relevance of this motion to the TICT character of the $S_{1}$ states of aniline, DEA, diethylaminobenzonitrile (DEABN), and related molecules. en_US dc.format.extent 49629 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ANILINE, DIETHYLANILINE, AND DIETHYLAMINOBENZONITRILE. $S_{0}$ AND $S_{1}$ STRUCTURES FROM ROTATIONALLY RESOLVED OPTICAL $SPECTROSCOPY^{1}$ en_US dc.type article en_US
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