作者:Jing Chen、Paul J. Dagdigian
DOI:10.1016/0009-2614(93)89165-e
日期:1993.10
Selectively detected fluorescence excitation spectra have been employed to find and assign Q-type subband heads in the HNF A2A'-X2A''2(1/0)3(1/0) and 2(2/0)3(1/0) bands, which are obscured because of the near equality of the omega2' and omega3' vibrational frequencies by the stronger 2(2/0) and 2(3/0) bands, respectively. A number of previously unobserved heads in the corresponding DNF band system are also reported. Dispersed fluorescence spectra were also taken for excitation of a variety of HNF and DNFA2A' vibrational levels, and the energies of vibrational levels in their ground X2A'' electronic states were derived. These energies were fit to determine vibrational constants. The following values (in cm-1) were derived for the harmonic constants omega0/1'', omega0/2'', and omega0/3'': 3167(6), 1455(2), 1036(7) for HNF and 2339(4), 1084(3), 1013(6) for DNF.