期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 13, 期 47, 页码 21063-21069出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp22197c
关键词
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资金
- Ministerio de Ciencia e Innovacion [CTQ 2006-05981/BQU, CTQ2010-17436, CSD2009-00038]
- Junta de Castilla y Leon [VA070A08]
Nicotine has been investigated in the gas phase and two conformational forms were characterized through their rotational spectra. Two spectroscopic techniques have been used to obtain the spectra: a new design of broadband Fourier transform microwave (FTMW) spectroscopy with an in-phase/quadrature-phase-modulation passage-acquired-coherence technique (IMPACT) and narrowband FTMW spectroscopy with coaxially oriented beam-resonator arrangement (COBRA). The rotational, centrifugal distortion and hyperfine quadrupole coupling constants of two conformers of nicotine have been determined and found to be in N-methyl trans configurations with the pyridine and pyrrolidine rings perpendicular to one another. The quadrupole hyperfine structure originated by two N-14 nuclei has been completely resolved for both conformers and used for their unambiguous identification.
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