酚酞指示剂变色原理的计算化学实验研究

Computational Chemical Experiments on the Discoloration Principle of Phenolphthalein Indicator

针对无机化学课程中最基础的酚酞变色反应,设计了一个面向化学专业大三年级本科生结构化学课程的计算化学实验。应用高斯程序研究酚酞变色反应历程,通过变色前后紫外-可见吸收光谱变化的宏观现象,引导学生从多个微观角度理解酚酞变色反应机理,进行分组知识拓展训练,形成“课堂-微课题-翻转课堂”的科创培育模式。

This study presents a computational chemistry experiment designed for junior undergraduates majoring in chemistry in the structural chemistry course,focusing on the discoloration principle of phenolphthalein indicator.The experiment serves as a fundamental investigation into discoloration reactions in the inorganic chemistry course.By employing the Gaussian program,the discoloration processes of phenolphthalein are explored.Through the analysis of macroscopic phenomena,such as changes in UV-Vis absorption spectra before and after discoloration,students gain insights into the mechanism of phenolphthalein discoloration from various microscopic perspectives.Additionally,the“class-micro-topic-flipped classroom”approach is employed to foster scientific innovation by incorporating knowledge extension training.