Spectral study of reactions involving organic vapours and the pink afterglow of nitrogen

Fourier transform emission spectroscopy of the B2Σ+–X2Σ+ system of CN

“…Most of the observed perturbations in the B 2 R + state are the result of interactions from the lower-lying A 2 P state, although some are also due to the a 4 P state. The perturbations observed in the A 2 P and B 2 R + states have been studied in detail [17][18][19][20][21][22][23]. Kotlar et al [17] have performed a deperturbation analysis and provided a set of deperturbed constants for the A 2 P (v = 0-12) and B 2 R + (v = 0-8) states of CN, while Gorbal and Savadatti [18] observed high-J perturbed lines in the 11-11, 12-12, 13-13, and 14-14 bands of the B 2 R + -X 2 R + transition.…”

“…The perturbations observed in the A 2 P and B 2 R + states have been studied in detail [17][18][19][20][21][22][23]. Kotlar et al [17] have performed a deperturbation analysis and provided a set of deperturbed constants for the A 2 P (v = 0-12) and B 2 R + (v = 0-8) states of CN, while Gorbal and Savadatti [18] observed high-J perturbed lines in the 11-11, 12-12, 13-13, and 14-14 bands of the B 2 R + -X 2 R + transition. Ito, Kuchitsu and co-workers have performed an extensive analysis of perturbations in the A 2 P and B 2 R + states of CN, and have published a series of papers providing deperturbed spectroscopic constants for the low-lying electronic states of CN [19][20][21][22][23][24].…”

Chemiluminescent and other processes leading to the excitation of cyanogen

“…We have studied the emissions resulting from the reaction of pink afterglow with C2H2 and BrCN. 186 We find CN(B -* A) bands that are rarely observed in addition to CN(A -X) and CN(B -*• X) bands; the overall intensity of (A -» X) and (B -» X) bands is high compared to emission from the flame with Lewis Rayleigh glow. (B -»• X) bands are intense, with well-developed tail bands going up to v' = 15.…”

“…This would also be consistent with observed abnormal high rotational temperature. 186 The present situation can be summed up as follows:…”

Violet emission of cyanogen produced in the reaction of argon(3P0,2) with cyanogen bromide. 1. Nascent vibrational and rotational distributions of CN(B2.SIGMA.+)

“…[Note: From eq A2 in Appendix I, nvib is 1.5 and 3.0 for two-body and three-body dissociations, respectively, since the respective values of Ntt are 3 and 6.] On the other hand, complex formation Arm + BrCN -(ArBrCN)* (ArBrCN)* -» CN(B2E+) + Ar + Br (24) is a three-body dissociation, for which nvib is calculated to be 3.0 [see note in text above]. The mechanism of exciplex formation, where an excited rare-gas cyanide is formed as an intermediate Arm + BrCN -(Ar+CN~)* + Br (Ar+CN")* -* CN(B2E+) + Ar (25) is a two-step reaction, where each step is composed of two-body dissociation.…”