乙醇和水分子形成配合物与荧光光谱特性研究

Fluorescence spectrum characteristics of ethanol-water clusters

讨论了紫外光照射乙醇和水混合溶液的荧光光谱及其对应的激发光谱,认为乙醇和水分子混合时会发生团簇形成新的分子从而成为能辐射荧光的物质.采用不同波长的紫外光照射乙醇水溶液,计算了不同入射光的荧光量子产率,进而选取具有最高荧光效率的激励光照射不同混合比率溶液,通过探测混合物所发射的荧光光子数目随乙醇和水混合比率的变化规律,研究了团簇分子的可能类型,并利用荧光强度和吸收率的加和性计算了混合物的总吸收率和总荧光光子数目,从而解释了乙醇水溶液的荧光光谱特征峰.结果可为乙醇和水分子形成的新团簇分子研究提供实验和理论依据.

The fluorescence spectra of the ethanol-water mixture excited by ultraviolet light and the excitation spectra corresponding to the fluorescence peaks are investigated respectively. It is found that the mixtures emit fluorescence photons, which is different from pure ethanol and water. One can conclude that new molecule clusters are created by mixing of the ethanol and water molecules. The incident light of different wavelengths irradiates the solution and the fluorescence quantum yield at each wavelength is calculated firstly, and then the excited light with the maximum quantum yield is selected to irradiate the mixture. By the experimental results of fluorescence spectra of solution with different concentrations, the possible structures of these new molecule clusters are discussed. The general absorptivity and fluorescence counts are calculated basing on the additive property of absorptivity and fluorescence intensity, elucidating the fluorescence spectra characteristic of ethanol-water mixture. The researeh may contribute to the study of the new molecule clusters of ethanol-water.