CH^35Cl3和CH^35Cl2^37Cl分子V=3的傅里叶变换光谱研究

采用傅里叶变换光谱技术（ＦＴＳ）记录了ＣＨ＾３５Ｃｌ３和它的同位素分子ＣＨ＾３５Ｃｌ２＾３７Ｃｌ的Ｖ＝３的高分辨光谱，由于０．０２ｍ＾－１分经不足以分辨Ｋ结构，我们将所观察到的谱线近似归属为Ｋ＝０的转动能级，归属了ＣＨ＾３５Ｃｌ３岔子４〈Ｊ〈７３，ＣＨ＾３５Ｃｌ＾３７Ｃｌ分子６〈Ｊ〈５３的转动级。最后采用最小二乘法拟合，得到了关于Ｊ的转动常数和振动带心。

THE HIGH RESOLUTION SPECTROSCOPY OF CH 35 Cl 3 AND CH 35 Cl 2 37 V=3 STRETCHING OVERTONE

The Fourier transform spectrometer (FTS) is used to record the high resolution spectrum of V = 3 stretching overtone for two isotopic species: CH35Cl3 and CH35Cl2(37)Cl. The rotational constants of CH35Cl2(37) Cl are calculated approximately from its isotope, CH35Cl3. The ground states combination difference method is used to assign the observed transitions. Because of the relatively small rotational constant, the resolution of 0.02 cm(-1) is still not enough to resolve the rotational K structure of CHCl3. So, all the observed transitions are assigned as parallel band transitions arising from the k = 0 rotational states. A weighted non-linear least-square fitting program is developed to fit the assigned transitions and derive the rotational constants. The result of the fitting for the CH35Cl2(37)Cl spectrum indicates that it is reasonable and reliable to derive the spectroscopic parameters using the isotopic effect.