The 103–360 GHz rotational spectrum of benzonitrile, the first interstellar benzene derivative detected by radioastronomy
The 103–360 GHz rotational spectrum of benzonitrile, the first interstellar benzene derivative detected by radioastronomy
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苯甲腈的 103-360-GHz 旋转光谱,第一个通过射电天文学检测到的星际苯衍生物
DOI:
10.1016/j.jms.2018.06.004
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发表时间:
2018
影响因子:
1.4
通讯作者:
Kisiel, Zbigniew
中科院分区:
文献类型:
--
作者:
Zdanovskaia, Maria A.;Esselman, Brian J.;Lau, Hunter S.;Bates, Desiree M.;Woods, R. Claude;McMahon, Robert J.;Kisiel, Zbigniew
Recently, several cm-wave transitions of benzonitrile have been detected in the interstellar medium (TMC-1). In this work, the mm-wave spectrum of benzonitrile (C 6 H 5 CN, C 2v, μ a= 4.5 D), a planar asymmetric rotor molecule, is reported in the 103–360 GHz frequency region. Over 3000 rotational transitions have been newly measured for the ground state and were combined with previous data in a global fit, which allows predictions of both low-temperature hyperfine resolved and high-frequency unresolved rotational spectra. Rotational transitions in the lowest fundamentals, ν 22 and ν 33 (141 and 163 cm− 1, respectively), have been observed for the first time, and were complemented by identification of several nominal interstate transitions resulting from strong interstate mixing. Application of a two-state, Coriolis-coupled model accounted, to within experimental precision, for many identified interstate perturbations resulting in ΔE 22, 33= 19.108185 (7) cm− 1 and| ζ 22, 33 a|= 0.841 (7). This study provides insight into the generic problem affecting the lowest excited vibrational states of this molecular class and describes the techniques allowing its successful analysis. The new data provide the foundation for future remote detection applications of benzonitrile.
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DOI:
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发表时间:
1971
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
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2016
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1.4
作者:
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影响因子:
4.4
作者:
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