Dispersed fluorescence spectroscopy of the CBr2A1B1-X1A1 transition.
Dispersed fluorescence spectra following the excitation of the CBr2A1B1-X1A1 2 and 2 bands at visible wavelengths were acquired in a discharge supersonic free jet expansion using an intensified charge-coupled device (ICCD) detector. The dispersed fluorescence spectra show signal-to-noise ratios of up to 60 and extend out to a maximum red shift frequency of 6000 cm(-1). Complete and detailed vibrational structure of the ground singlet state (X1A1) was observed. Vibrational parameters including fundamental frequencies, anharmonicities, and coupling constants were determined for the CBr2 X1A1 state. Additional vibrational structure starting at approximately 3650 cm(-1) was observed and this indicates the singlet-triplet energy gap to be >10 kcal mol(-1).
Hsu
Hui-Ju
HJ
Department of Chemistry, National Central University, Chung-Li. 32001, Taiwan. bchang@cc.ncu.edu.tw
Chang
Wei-Zhong
WZ
Chang
Bor-Chen
BC