title: Spectroscopic study on deuterated benzenes. II. High-resolution laser spectroscopy and rotational structure in the S(1) state.
abstract: High-resolution spectra of the S1←S0 transition in jet-cooled deuterated benzenes were observed using pulse dye amplification of single-mode laser light and mass-selective resonance enhanced multiphoton ionization (REMPI) detection. The vibrational and rotational structures were accurately analyzed for the vibronic levels in the S1 state. The degenerate 6(1) levels of C6H6 or C6D6 are split into 6a(1) and 6b(1) in many of deuterated benzenes. The rigid-rotor rotational constants were assessed and found to be slightly different between 6a and 6b because of different mean molecular structures. Their rotational levels are significantly shifted by Coriolis interactions. It was found that the Coriolis parameter proportionally changed with the number of substituted D atoms.
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Sachi
authors.initials: S
authors.lastname: Kunishige
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Toshiharu
authors.initials: T
authors.lastname: Katori
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Baba
authors.affiliation: Institute for Molecular Science, National Institute of Natural Science, Myodaiji, Okazaki 444-8585, Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Hayashi
authors.affiliation: Department of Basic Science, Graduated School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan.
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Hasegawa
authors.affiliation: Institute for Molecular Science, National Institute of Natural Science, Myodaiji, Okazaki 444-8585, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Ohshima