The emission spectrum of VN has been investigated in the 3400-19 400 cm(-1) region using a Fourier transform spectrometer. The bands were observed from the reaction of VOCl3 vapor with active nitrogen. In addition to the previously known transitions of VN, several new bands observed in the visible and near infrared have been classified into two new electronic transitions, e (1)Pi -a (1)Delta and d (1)Sigma (+)-b (1)Sigma (+). Four bands with origins near 5267.49, 5290.48, 5318.86, and 5349.45 cm(-1) have been identified as the 0-0, 1-1, 2-2, and 3-3 bands, respectively, of the d (1)Sigma (+)-b(1)Sigma (+) transition. The excited d (1)Sigma (+) state is known from the d E-1(+)-X (3)Delta (1) transition observed previously by B. Simard, C. Masoni, and P. A. Hackett (J. Mol. Spectrosc. 136, 44-55 (1989)). The d (1)Sigma (+)-X (3)Delta (i) transition has also been observed in our spectra. Another band with two P, two Q, and two R branches and band origin near 14 292.77 cm(-1) has been assigned as the e (1)Pi -a (1)Delta transition. A rotational analysis of bands of the three transitions has been carried out and the spectroscopic constants have been evaluated. The principal spectroscopic constant's for the a (1)Delta state, which is most probably the lowest singlet state of VN, are B-0 = 0.634 804(31) cm(-1), D-0 = 9.03(14) x 10(7) cm(-1), and r(o) = 1.554 891(38) Angstrom, while the equilibrium rotational constants for the b (1)Sigma (+) state are B-e = 0.617 896(26) cm(-1), alpha (e) = 0.004 148(19) cm(-1), and r(e) = 1.576 022(33) Angstrom. The d (1)Sigma (+) state is affected by interactions with a close-lying perturbing state. (C) 2001 Elsevier Science.
|Number of pages||9|
|Journal||JOURNAL OF MOLECULAR SPECTROSCOPY|
|Publication status||Published - Nov 2001|
- AB-INITIO CALCULATIONS
- VANADIUM MONONITRIDE
- METAL NITRIDES
- DIATOMIC FEN