The laser thermal lens spectroscopy (TLS) was used to measure the thermo-optical parameters of alcohols(1)–trichloromethane(2) binary mixtures with high accuracy. Using this spectroscopic method, the thermal lens characteristic time (t_c), thermal diffusivity (D_th), thermal conductivity (k), thermo-optic coefficient (dn/dT), and the refractive index changes with the sample deposited heat (dn/dQ) were measured for each of the pure components of this binary mixture at 298 K and fixed laser energy. The experimental results are in good agreement with the reference data. Then, for these binary mixtures, the dependency of k, dn/dT, and dn/dQ on the concentration was obtained and molecularly analyzed. The results show that increasing the volume fraction of alcohol in these binary mixtures leads to increasing k, dn/dT, and dn/dQ of these binary mixtures.

激光热透镜光谱（TLS）用于高精度测量醇（1）-三氯甲烷（2）二元混合物的热光参数。使用这种光谱方法，热透镜特征时间（t _c）、热扩散率（D _th）、热导率（k）、热光系数（dn/dT）和折射率随样品沉积热量（dn /dQ ) 在 298 K 和固定激光能量下对这种二元混合物的每个纯组分进行测量。实验结果与参考数据吻合良好。然后，对于这些二元混合物，k、dn/dT和获得关于浓度的dn/dQ并进行分子分析。结果表明，增加这些二元混合物中酒精的体积分数会导致这些二元混合物的k、dn/dT和dn/dQ增加。