Local Mode Effects in the Absorption Spectrum of H2S between 10 780 and 11 330 cm−1

H232S : First Observation of the (70±,0) Local Mode Pair and Updated Global Effective Vibrational Hamiltonian

“…However, interactions with other rovibrational states may lead to the breakdown of the local mode behavior and then limit the application of the local mode approach. Such a situation was encountered in particular in our recent study of the (40 ± , 1) local mode pair at 11 008.684 cm −1 (4), where resonance interactions with the neighboring vibrational dark states were found to affect the two components of the local mode pair differently. The present study will trace the evolution of the local mode behavior with increasing stretching excitation.…”

“…This paper is a continuation of our efforts aimed at investigating the high overtone absorption spectrum of hydrogen sulfide by intracavity laser absorption spectroscopy (ICLAS) (1)(2)(3)(4). The highest overtone transition of H 2 S reported so far was observed in the region 14 100-14 400 cm −1 and corresponds to an excitation of the (60 ± , 0) and (50 ± , 2) local mode pairs (2).…”

On the study of high-resolution rovibrational spectrum of H2S in the region of 7300–7900cm−1

“…Both the local mode properties, and the conditions of their destruction can be analyzed in the rovibrational spectra of H 2 S. As a consequence, numerous spectroscopic studies have been carried out on this molecule (see, for example, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]), beginning at the low frequency microwave region [1], up to visible transitions in the highly excited stretching bands ð70 AE ; 0Þ observed by the sensitive intra-cavity laser absorption spectroscopy, [18]. The ground vibrational state was analyzed in [1][2][3][4][5].…”

“…The lowest five poliads of interacting vibrational states, with v ¼ v 1 þ v 2 =2 þ v 3 , v ¼ 0:5, 1, 1.5, 2, 2.5, were discussed in [6][7][8][9][10][11], respectively. Highly excited stretching local mode states v ¼ 4, 4.5, 5, 6, 7 were considered in [12][13][14][15][16][17][18]. Moreover, the band centers of some additional infrared bands were discussed in [18].…”

High-resolution rotational analysis of HDS: 2ν3, ν2+2ν3, 3ν3, and ν2+3ν3 bands

“…In the last few decades, the absorption spectra of H 2 S have been studied extensively, with microwave [2][3][4][5][6], Fourier-transform infra-red [7][8][9][10][11][12][13], and intracavity laser absorption spectroscopy at near-IR and visible region [14][15][16][17][18][19][20][21]. But for the deuterated sample, there are just a few bands were studied with high-resolution.…”