Observation of vibronically excited thioformaldehyde at 62,000-72,000cm(-1) by 1+1'+1' resonance enhanced multiphoton ionization spectroscopy.
Vibronically excited thioformaldehyde (H(2)CS) has been studied by two-color 1+1'+1' resonance enhanced multiphoton ionization (REMPI) spectroscopy, in which the C (1)B(2)0(0)(0) state of H(2)CS was selected as an intermediate state for the resonant excitation to high-lying electronic states at 62,000-72,000cm(-1). In light of the distinctive selection rules for the 1+1'+1' REMPI and one-photon direct absorption transitions excited from the C (1)B(2) and X (1)A(1) states of H(2)CS, respectively, we have been able to identify 1 valence state (npi, pi*(2)), and 14 Rydberg states (n, 5s), (pi, 4s), (n, 3d(xz)), (n, 3d(yz)), (n, 5p(z)), (n, 5p(x)), (n, 5p(y)), n,4d(z)2), (n, 4d(xz)), (n, 4d(yz)), (n, 6s), (pi, 4p(y)), (n, 6p(z)), and (n, 6p(y)), in this study.
Wu
Hsing-Chen
HC
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
Chen
Chun-Cing
CC
Chen
Yit-Tsong
YT
D004583:Electrons; D005557:Formaldehyde / Q000031:analogs & derivatives* / Q000737:chemistry*; D017785:Photons; D013057:Spectrum Analysis / Q000379:methods*; D014732:Vibration
C527773:thioformaldehyde; D005557:Formaldehyde