Laser-induced fluorescence and fluorescence depletion spectroscopy of SCCS−
| Autor: | Yu Yoneda, Masakazu Nakajima, Takashi Nagata, Yasuki Endo, Yoshihiro Sumiyoshi |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Chemistry Analytical chemistry General Physics and Astronomy Ionic bonding Fluorescence Molecular electronic transition Spectral line Ion Physics::Atomic and Molecular Clusters Compounds of carbon Physical and Theoretical Chemistry Spectroscopy Laser-induced fluorescence |
| Zdroj: | The Journal of Chemical Physics. 119:7805-7813 |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | In a discharged supersonic jet of carbon disulfide, a band system of a new species is observed by laser-induced fluorescence (LIF) spectroscopy. Rotationally resolved spectra show that the observed electronic transition is 2Π3/2–2Π3/2. Since both sulfur and carbon atoms have even numbers of electrons, it is concluded that the spectral carrier is an ionic species. Furthermore, the spectral carrier is confirmed to have two equivalent carbon atoms from the LIF spectra of the 13C-substituted species. With a help of ab initio calculations, the carrier is identified as the linear negative ion SCCS−, where the observed electronic transition is considered to be A 2Πg–X 2Πu. A mass spectrometric measurement also gives evidence that SCCS− is produced in the discharged jet. The vibrational structure for the upper electronic state is determined by both LIF and fluorescence depletion spectroscopy. A dispersed fluorescence spectrum is also observed to determine the vibrational structure of the lower electronic state. ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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