CJCU

Chem. J. Chinese Universities

• Article • Previous Articles     Next Articles

Rovibrational spectrum of (SO2)2 complex in the ν3 region of SO2

LI Xiang1, PENG Kangning1, LIU Zhuang1, LUO Wei2, LU Yan3, ZHENG Rui1*   

  1. 1. College of Physics and Electronic Information, Nanchang Normal University

    2. School of Science, East China University of Technology

    3. College of Chemistry and Food Science, Nanchang Normal University

  • Received:2026-03-21 Revised:2026-04-24 Online First:2026-05-01 Published:2026-05-01
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.12464038, 12564035), the Natural Science Foundation of Jiangxi Provincial, China(Nos.20242BAB20031, 20252BAC240159), the Science and Technology Research Project of Henan Provincial, China(No.252102211100), the Science and Technology Research Project of Jiangxi Provincial Department of Education, China(No.GJJ2401902) and the Nanchang Normal University of Doctoral Research Initiation Foundation, China(No.NSBSJJ2023010)

PDF (PC)

Supplement

1

Abstract: In this work, high-resolution rovibrational spectrum of (SO2)2 in the ν3 asymmetric stretching region of SO2 were measured using a mid-infrared continuously tunable external cavity quantum cascade laser combined with pulsed supersonic jet infrared absorption spectroscopy. A total of 490 infrared transitions were identified, including 395 transitions in the electron-doner (ED) band (J ≤ 29, Ka ≤ 11) and 95 transitions in the electron-acceptor (EA) band (J ≤ 21, Ka ≤ 8). By integrating previously reported microwave spectral data, spectral data of SO2 monomer in the v1 excited state, and the newly measured spectral data in this work, global fitting was performed based on the asymmetric top Hamiltonian, yielding accurate ground and excited state spectroscopic parameters including rotational constants and centrifugal distortion constants. The band origins of the ED and EA bands of (SO2)2 are 1355.77424(14) cm-1 and 1356.34969(27) cm-1, respectively, exhibiting red shifts of 6.29 cm-1 and 5.71 cm-1 compared to the band origin of the v3 band of SO2 monomer.

Key words: Rovibrational spectrum, Sulfur dioxide dimer, Supersonic jet, Vibrational frequency shift

CLC Number: 

TrendMD: