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Conformationally resolved spectroscopy of jet-cooled methacetin
- Issue Date
- 16-Nov-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Methacetin (MA); Resonant two-photon ionization (R2PI); UV-UV hole-burning (UV-UV HB) spectroscopy; IR-dip spectroscopy; Quantum chemical calculations
- Citation
- CHEMICAL PHYSICS LETTERS, v.688, pp.26 - 32
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMICAL PHYSICS LETTERS
- Volume
- 688
- Start Page
- 26
- End Page
- 32
- ISSN
- 0009-2614
- Abstract
- The excitation spectra of jet-cooled methacetin (MA) have been measured using a combination of massselected resonant two-photon ionization and ultraviolet-ultraviolet hole-burning (UV-UV HB) spectroscopy in the gas phase. Four different UV-UV HB spectra originating from two conformers of MA (syn-and anti-MA) with their fundamental and hot transitions have been obtained. IR-dip spectroscopy has conclusively confirmed the coexistence of the two conformers with the aid of theoretical calculations. Vibronic band assignments in the low frequency region caused by internal methyl group rotation in the methyl-capped peptide group, which originate from the 1e rotational level, are presented. (C) 2017 Elsevier B.V. All rights reserved.
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