Hepp M, Herman M
Laboratoire de Chimie Physique Moléculaire, Université Libre de Bruxelles, Brussels, B-1050, Belgium
J Mol Spectrosc. 1999 Sep;197(1):56-63. doi: 10.1006/jmsp.1999.7893.
The infrared spectrum of ethane in the region of the CH-stretching fundamental vibrations, between 2600 and 3300 cm(-1), was recorded with a Bruker IFS120HR Fourier transform spectrometer. Jet-cooled and room-temperature conditions were used at 0.01 and 0.005 cm(-1) instrumental resolution, respectively. Ten weak combination bands were observed and vibrationally assigned, in addition to the three principal bands in the region (nu(5), nu(7), and nu(8) + nu(11) ( parallel component)). A stack-by-stack analysis was performed for five of the combination bands. Their origins were determined as follows: nu(8) + nu(12) ( parallel component) at 2665.1512(30) cm(-1), nu(2) + nu(6) at 2753.326(32) cm(-1), nu(6) + nu(11) at 2844.13069(75) cm(-1), nu(8) + nu(11) ( perpendicular component) at 2930.705(90) cm(-1), and nu(4) + nu(10) at 3255.568(50) cm(-1). Effective rovibrational parameters were obtained for the corresponding upper states. New information was also obtained on the five remaining combination bands. Their approximate origins are: nu(8) + nu(12) ( perpendicular component) at 2660 cm(-1), nu(2) + nu(4) + nu(12) at 2860 cm(-1), nu(4) + 2nu(9) + nu(12) at 3090 cm(-1), 3nu(4) + nu(8) + nu(9) at 3157 cm(-1), and nu(4) + 2nu(8) at 3225 cm(-1). Copyright 1999 Academic Press.
使用布鲁克IFS120HR傅里叶变换光谱仪记录了乙烷在2600至3300厘米⁻¹的CH伸缩基频振动区域的红外光谱。分别在0.01和0.005厘米⁻¹的仪器分辨率下采用喷射冷却和室温条件。除了该区域的三个主要谱带（ν₅、ν₇以及ν₈ + ν₁₁（平行分量））外，还观测到并进行了振动归属的十个弱组合带。对其中五个组合带进行了逐堆栈分析。它们的起源确定如下：ν₈ + ν₁₂（平行分量）位于2665.1512(30)厘米⁻¹，ν₂ + ν₆位于2753.326(32)厘米⁻¹，ν₆ + ν₁₁位于2844.13069(75)厘米⁻¹，ν₈ + ν₁₁（垂直分量）位于2930.705(90)厘米⁻¹，以及ν₄ + ν₁₀位于3255.568(50)厘米⁻¹。获得了相应上能级的有效转动振动参数。还获得了其余五个组合带的新信息。它们的近似起源为：ν₈ + ν₁₂（垂直分量）位于2660厘米⁻¹，ν₂ + ν₄ + ν₁₂位于2860厘米⁻¹，ν₄ + 2ν₉ + ν₁₂位于3090厘米⁻¹，3ν₄ + ν₈ + ν₉位于3157厘米⁻¹，以及ν₄ + 2ν₈位于3225厘米⁻¹。版权所有1999年学术出版社。
