物理化学学报 >> 1985, Vol. 1 >> Issue (04): 370-377.doi: 10.3866/PKU.WHXB19850412

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CF3I分子ν4带高分辨激光光谱研究

杨学明; 沈之烨; 朱清时; 张存浩   

  1. 中国科学院大连化学物理研究所
  • 收稿日期:1984-11-28 修回日期:1985-04-29 发布日期:1985-08-15

DIODE LASER INFRARED SPECTROSCOPY OF CF3I v4 BAND

Yang Xueming; Shen Zhiye; Zhu Qingshi; Zhang Cunhao   

  1. Dalian Institute of Chemical Physics, Academia Sinica
  • Received:1984-11-28 Revised:1985-04-29 Published:1985-08-15

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摘要： CF_3I分子的转动常数很小, 其振动谱带的转动结构在一般分辨率的光谱中不能分辨。我们用分辨率达2×10~(-3) cm~(-1)的红外二极管激光光谱的方法观察到了ν_4带的近十个Q支, 和上千条~PP, ~RR线, 以及ν_4+ν_6←ν_6和ν4+ν_3←ν_3两个热带跃迁, 并归属了其中的一些谱线, 研究了ν_4带中可能存在的振转相互作用, 利用最小二乘法拟合, 得到了有关的分子常数。

Abstract: CF_3I is an important molecule in the field of infrared laser chemistry, but its rotational structure of vibrational bands remained unresolved so far because of its small rotational constants. The diode laser infrared spectroscopy of ν_4 band under the resolution of 0.002 cm~(-1) is reported here. About ten Q sub-braches, and some thousands of ~PP, ~RR lines were observed, two hot bands ν_4+ν_6←ν_6 and ν_4+ν_3←ν_3 were also investigated. Possible vibration-rotation interactions in ν_4 band were studied. Some of ~RR lines were assigned and least-squares fitted to get the molecular constants, some are improved and others are reported for the first time.