摘要
通过对甲醇和乙醇溶液的吸收光谱和荧光光谱的研究,对应比较两种溶液的光谱,结果表明,两者的最长吸收波长差为15nm左右,荧光中心波长差为33nm左右,从而为准确区分甲醇、乙醇提供了直接的实验依据。根据分子结构理论,合理解释了两种溶液的光谱特性存在差异的原因在于羟基的位置排列上;由此提出了用最长吸收波长和荧光光谱中心位置的光谱特性来有效区分甲醇、乙醇分子的方法。此外,根据实验结果,推算出甲醇分子产生荧光主跃迁能级差为3.66ev,乙醇分子产生荧光主跃迁能级差为4.05ev,这些数据可为理论计算提供验证参考。
The absorption and fluorescent spectra of methanol and ethanol solutions induced by UV-light are compared in the paper. Based on the obtained results, a difference of 15 nm in longest absorption wavelength and a difference of 33 nm in center fluorescent wavelength are used for precise distinction of methanol and ethanol. According to the arrangement of hydroxyl group, the mechanism to produce the difference of two solutions is also explained from molecular structural theory. Besides, with experimental data, the result of methanol main transition interval between levels 3.66 eV and ethanol main transition interval between levels 4.05 eV can be obtained. These data facilitate research of methanol and ethanol theoretically.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2005年第4期24-27,共4页
Opto-Electronic Engineering
基金
国家自然科学基金资助项目(20276027)
教育部工业生物技术重点实验室开放课题
关键词
甲醇
乙醇
吸收光谱
荧光光谱
Methanol
Ethanol
Absorption spectra
Fluorescent spectra
