Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5415930 | Journal of Molecular Spectroscopy | 2007 | 7 Pages |
Abstract
Following the development of an improved discharge recipe for production of dibromocarbene (CBr2), and an extensive spectroscopic survey of the AË1B1âXË1A1 system that has led to a revision in the position of the origin, we have recorded single vibronic level (SVL) emission spectra of C79Br81Br and C81Br2 which probe the vibrational structure of the XË1A1 state up to â¼7000Â cmâ1 above the vibrationless level. These spectra reveal many previously unassigned levels. In the region between â¼3600 and 5900Â cmâ1, or between the singlet-triplet gap proposed by Hsu et al. [H.-J. Hsu, W.-Z. Chang, B.-C. Chang, Phys. Chem. Chem. Phys. 2005, 7, 2468-2473] to that predicted by theory, we find that â¼90% of the lines can be assigned to XË1A1 levels within three standard deviations of our Dunham expansion fit, suggesting that the vast majority of emission lines terminate on levels of the singlet state. A nearly complete set of vibrational parameters was determined for the XË1A1 state; the derived parameters are in good agreement with recent ab initio predictions.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Chong Tao, Calvin Mukarakate, Scott A. Reid,