乙炔分子的振动模型

A MOLECULAR VIBRATION MODEL FOR ACETYLENE

乙炔分子振动不仅有经典力学的教学意义,对其分子振动信息的检测和分析还可直接应用于乙炔的浓度检测、光谱分析等。本文通过引入直线型三原子分子振动模型中的角簧概念,并在该三原子分子振动模型的基础上作进一步延伸,建立了乙炔分子振动的一个模型。并讨论了乙炔分子伸缩和弯曲两种振动模式,由此计算出乙炔分子在伸缩以及弯曲振动模式下分别对应的本征振动频率,并采用多组实验数据进行验证,模型预测结果与文献实验数据吻合较好。

Acetylene molecular vibration not only has the teaching significance of classical mechanics,but also can be directly applied to the detection and analysis of acetylene concentration and spectral analysis.In this paper,we introduce the concept of the angle spring in the linear three-atom molecular vibration model,and further extend it to establish a molecular vibration model of acetylene.Two kinds of vibration modes of acetylene molecular stretching and bending are discussed.The eigen vibration frequencies corresponding to stretching and bending vibration of acetylene molecules are calculated respectively.Some groups of experiments are used to validate our model.The predicted results of the theoretical model are in good agreement with the experimental data from.