Isotope effects in the infrared spectra of the polar and nonpolar isomers of N2O dimer
Isotope effects in the infrared spectra of the polar and nonpolar isomers of N2O dimer
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DOI：
10.1016/j.jms.2007.11.004
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发表时间：
2008-02
影响因子：
1.4
通讯作者：
M. Dehghany;M. Afshari;Z. Abusara;Cameron Van Eck;N. Moazzen-Ahmadi
中科院分区：
文献类型：
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作者：
M. Dehghany;M. Afshari;Z. Abusara;Cameron Van Eck;N. Moazzen-Ahmadi
用快扫描可调谐半导体激光光谱仪探测脉冲超音速喷流膨胀，研究了15N15N16O二聚体在单体(∼2150 cm−1)N-N伸缩基区的旋转分辨光谱。这些光谱与正常物种(14N14N16O)2的相应光谱非常相似。将所得到的结构参数和振动位移与正常物种和从头算的值进行了比较。这些结果证实了非极性异构体具有中心对称的滑移反平行结构，而极性异构体由两个滑移的(近似)平行的单体单元组成。
The rotationally resolved spectra of15N15N16O dimer for the polar and nonpolar isomers are studied in the region of the N–N stretching fundamental of the monomer (∼2150cm−1) using a rapid-scan tunable diode laser spectrometer to probe a pulsed supersonic jet expansion. These spectra are very similar to the corresponding spectra of the normal species, (14N14N16O)2. Structural parameters and vibrational shifts obtained here are compared with those of the normal species and ab initio values. These results confirm that the nonpolar isomer has a centrosymmetric slipped-antiparallel structure while the polar isomer consists of two slipped and (approximately) parallel monomer units.