Rotational and Vibrational Spectroscopy and Ideal Gas Heat Capacity of HFC 134a (CF3CFH2)
Rotational and Vibrational Spectroscopy and Ideal Gas Heat Capacity of HFC 134a (CF3CFH2)
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HFC 134a (CF3CFH2) 的旋转和振动光谱以及理想气体热容
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
R. Smalley
中科院分区：
文献类型：
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作者：
Li;A. M. Andrews;R. Cavanagh;G. T. Fraser;K. Irikura;F. Lovas;Jens‐Uwe Grabow;W. Stahl;M. Crawford;R. Smalley
氢氟碳化合物 HFC 134a (CF3CFH2) 是氯氟碳化合物 CFC 12 (CF2Cl2) 在许多应用中的主要替代品，包括汽车空调以及家庭和商业制冷。在这里，我们描述了对该分子的全面光谱研究。使用脉冲分子束傅立叶变换微波光谱仪获得了振动基态的精确微波频率和分子常数。还进行了新的同位素基态微波测量，以改进基态结构测定。已经获得了红外和拉曼光谱，并且所有18个振动都已被观测和分配。高分辨率 (3 MHz) 微波边带 CO2 激光器和电共振光热光谱仪已用于观察此处指定的 975 cm-1 处低分辨率气相特征附近的分子束红外光谱，以及在一些早期研究中作为 ν15、A’’-对称性、CH2 岩石的分子束红外光谱。两个人几乎...
The hydrofluorocarbon HFC 134a (CF3CFH2) is the primary replacement for the chlorofluorocarbon CFC 12 (CF2Cl2) in numerous applications, including automobile air conditioning and home and commercial refrigeration. Here we describe a comprehensive spectroscopic study of this molecule. Precise microwave frequencies and molecular constants have been obtained for the vibrational ground state with a pulsed-molecular-beam Fourier-transform microwave spectrometer. New isotopic ground-state microwave measurements have also been made to improve the ground-state structural determination. Infrared and Raman spectra have been obtained, and all 18 vibrations have been observed and assigned. A high-resolution (3 MHz) microwave-sideband CO2 laser and an electric-resonance optothermal spectrometer have been used to observe the molecular-beam infrared spectrum in the vicinity of the low-resolution gas-phase feature at 975 cm-1 assigned here and in some of the earlier studies as the ν15, A‘‘-symmetry, CH2 rock. Two nearly ...