为了探究β-胡萝卜素在高压下是否会发生相变, 进行了0～30 Gpa压强范围内β-胡萝卜素的高压拉曼光谱实验。通过评估不同压强范围内拉曼光谱频移-压强的线性函数变化来判断β-胡萝卜素是否发生相变。研究表明, 当压强升至约为7 Gpa以及14 Gpa时, β-胡萝卜素分子的频移-压强线性函数方程发生了变化, 即发生了相变。通过分析频移-压强函数线性关系是否发生变化来判断相变, 是简捷、方便的技术方法。关于纯β-胡萝卜素压力相变的研究, 暂未检索到相关报道。

To investigate whether β-carotene has a phase change under high pressure, high pressure Raman spectroscopy of β-carotene in the range of 0 to 30 Gpa pressure was performed. By evaluating the linear function change of Raman spectral frequency-pressure in different pressure ranges, whether or not a phase transition occurs can be determined. The study shows that when the pressure rises to about 7 Gpa and 14 Gpa, the frequency-pressure linear function equation of β-carotene molecules changes, which means that the phase transition occurs. To analyze whether the frequency-pressure linear relationship is changed is a simple and convenient technical method for judging whether the phase shift is changed. The study of stress phase transition of neat β-carotene has not been reported.