Institut für Physikalische Chemie und Elektrochemie, Lehrgebiet A, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, D-30167 Hannover, Germany.
Phys Chem Chem Phys. 2011 Dec 21;13(47):21063-9. doi: 10.1039/c1cp22197c. Epub 2011 Oct 21.
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 (14)N nuclei has been completely resolved for both conformers and used for their unambiguous identification.
尼古丁在气相中进行了研究，并通过其旋转光谱表征了两种构象形式。使用了两种光谱技术来获得光谱：一种具有同相/正交相调制通过获得相干技术（IMPACT）的新型宽带傅里叶变换微波（FTMW）光谱和具有同轴定向光束谐振器布置（COBRA）的窄带 FTMW 光谱。两种尼古丁构象的旋转、离心畸变和超精细四极偶合常数已被确定，并发现它们处于 N-甲基反式构型，吡啶环和吡咯烷环彼此垂直。两个（14）N 核引起的四极超精细结构已完全为两种构象分解，并用于它们的明确识别。
