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Reza MA, Paul AC, Reilly NJ, et al. Dispersed Fluorescence Spectroscopy of Jet-Cooled Isobutoxy and 2-Methyl-1-butoxy Radicals. J Phys Chem A. 2016;120(34):6761-7doi: 10.1021/acs.jpca.6b06445.
Reza, M. A., Paul, A. C., Reilly, N. J., Alam, J., & Liu, J. (2016). Dispersed Fluorescence Spectroscopy of Jet-Cooled Isobutoxy and 2-Methyl-1-butoxy Radicals. The journal of physical chemistry. A, 120(34), 6761-7. https://doi.org/10.1021/acs.jpca.6b06445
Reza, Md Asmaul, et al. "Dispersed Fluorescence Spectroscopy of Jet-Cooled Isobutoxy and 2-Methyl-1-butoxy Radicals." The journal of physical chemistry. A vol. 120,34 (2016): 6761-7. doi: https://doi.org/10.1021/acs.jpca.6b06445
Reza MA, Paul AC, Reilly NJ, Alam J, Liu J. Dispersed Fluorescence Spectroscopy of Jet-Cooled Isobutoxy and 2-Methyl-1-butoxy Radicals. J Phys Chem A. 2016 Sep 01;120(34):6761-7. doi: 10.1021/acs.jpca.6b06445. Epub 2016 Aug 17. PMID: 27504673.
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J Phys Chem A. 2016 Sep 01;120(34):6761-7. doi: 10.1021/acs.jpca.6b06445. Epub 2016 Aug 17.

Dispersed Fluorescence Spectroscopy of Jet-Cooled Isobutoxy and 2-Methyl-1-butoxy Radicals.

The journal of physical chemistry. A

Md Asmaul Reza, Anam C Paul, Neil J Reilly, Jahangir Alam, Jinjun Liu

Affiliations

  1. Department of Chemistry and ‡Conn Center for Renewable Energy Research, University of Louisville , Louisville, Kentucky 40292, United States.

PMID: 27504673 DOI: 10.1021/acs.jpca.6b06445

Abstract

We report dispersed fluorescence (DF) spectra of the isobutoxy and 2-methyl-1-butoxy radicals produced by photolysis of corresponding nitrites in supersonic jet expansion. Different vibrational structures have been observed in the DF spectra when different vibronic bands in the laser-induced fluorescence (LIF) spectra of each radical were pumped, which suggests that those vibronic bands be assigned to different conformers. Spectra simulated using calculated vibrational frequencies and Franck-Condon factors well reproduce the experimentally observed ones and support the assignment of the vibronic bands in the LIF spectra to the two lowest-energy conformers of each radical. DF spectra obtained by pumping the B̃ ← X̃ origin bands of the LIF spectra are dominated by CO stretch progressions because of the large difference in CO bond length between the ground (X̃) and the second excited (B̃) electronic states. Furthermore, with non-CO stretch bands pumped, the DF spectra are dominated by progressions of combination bands of the CO stretch and the pumped modes as a result of Duschinsky mixing. Ã-X̃ separation of both conformers of the isobutoxy radical has also been determined in the experiment.

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