酚酞分子结构的研究

Study on the molecular structure of phenolphthalein

采用中红外(MIR)光谱(包括一维MIR光谱、二阶导数MIR光谱、四阶导数MIR光谱及去卷积MIR光谱)开展了酚酞的分子结构研究。实验发现:酚酞分子的红外吸收模式主要包括CH伸缩振动模式(ν_(C-H-酚酞))、C=O伸缩振动模式(ν_(C=O-酚酞))和C=C伸缩振动模式(ν_(C=C-酚酞));酚酞分子的去卷积MIR光谱的谱图分辨能力要优于相应的一维MIR光谱、二阶导数MIR光谱和四阶导数MIR光谱。本项研究拓展了MIR光谱技术在重要的精细化学品(酚酞)分子结构的研究范围。

The molecular structure of phenolphthalein was studied by mid-infrared(MIR)spectrum(including one-dimensional MIR spectrum,second derivative MIR spectrum,fourth derivative MIR spectrum and deconvolution MIR spectrum).It is found that the infrared absorption modes of phenolphthalein molecule mainly include CH stretching vibration mode(ν_(C-H-phenolphthalein)),C=O stretching vibration mode(ν_(C=O-phenolphthalein))and C=C stretching vibration mode(ν_(C=C-phenolphthalein));the resolution of the deconvolution MIR spectrum of phenolphthalein molecule was better than the corresponding one-dimensional MIR spectrum,the second derivative MIR spectrum and the fourth derivative MIR spectrum.This study expands the research scope of MIR spectrum in the molecular structure of important fine chemicals(phenolphthalein).