Emission Spectroscopy of Unstable Molecules using a Fourier Transform Spectrometer

Fourier Transform 분광기를 이용한 불안정한 분자의 방출분광학

  • Sang Kuk Lee (Department of Chemistry, Pusan National University) ;
  • Un Sik Kim (Department of Chemistry, Pusan National University)
  • 이상국 (釜山大學校 自然科學大學 化學科) ;
  • 김은식 (釜山大學校 自然科學大學 化學科)
  • Published : 1993.04.20

Abstract

Fourier Transform UV/VIS spectrometer has been modified for emission spectroscopy with the technique of supersonic expansion, in which the unstable molecular radical $CH_3S$ has been generated in a jet by a high voltage DC discharge. The fluorescence spectra of the supersonically cooled radical have been recorded on a Fourier Transform UV/VIS spectrometer. The ratio of signal to noise of the spectra has been improved substantially. Also the rotational structure has been clearly resolved for $CH_3S$ molecular radical.

불안정한 분자의 방출분광학에 상요이 가능하도록 Fourier Transform 분광기를 변형시켰다. 불안정한 분자 라디칼 $CH_3S$는 고전압 직류 방전에 의한 supersonic expansion 속에서 jet 형태의 흐름으로 생성되었다. Supersonic expansion에 의하여 냉각된 라디칼의 형광 스펙트럼은 Fourier Transform UV/VIS 분광기에 의해서 얻어졌다. 스펙트럼의 signal/noise 비율은 증가하였으며, 분자 라디칼 $CH_3S$의 회전구조도 명확하게 볼 수 있었다.

Keywords

References

  1. J. Chem. Phys v.61 R. E. Smalley;B. L. Ramakrishna;D. H. Levy;L. Wharton
  2. J. Chem. Phys v.63 R. E. Smalley;L. Wharton;D. H. Wharton
  3. Microwave molecular Spectra W. Gordy;R. L. Cook
  4. Chem. Phys. Lett v.162 L. Yu;S. C. Foster;J. M. Williamson;T. A. Miller
  5. J. Mol. Spectrosc v.118 S. Urban;R. D'Cunha;J. Manheim;K. N. Rao
  6. Can. J. Phys v.62 L. Lechuga-Fossat;J. M. Flaud;C. Camy-Peyret;J. W. C. Johns
  7. J. Mol. Spectrosc v.117 J. I. Choe;T. Tipton;S. G. Kukolich
  8. Chem. Phys. Lett v.157 E. C. Richard;D. J. Donaldson;V. Vaida
  9. Chem. Phys. Lett v.52 K. Ohbayashi;H. Akimoto;I. Tanaka
  10. J. Phys. Chem v.95 M. H. Suh;S. K. Lee;B. D. Rehfuss;T. A. Miller;V. E. Bondybey
  11. J. Chem. Phys v.81 M. Suzuki;G. Inoue;H. Akimoto
  12. S. K. Lee