Study on fluorescence spectra of molecular association of acetic acid-water  

作　　者：韩彩芹 刘莹 杨洋 倪晓武 陆建 骆晓森 

机构地区：[1]College of Physics and Electronic Engineering,Xuzhou Normal University [2]College of Science,Nanjing University of Science and Technology

出　　处：《Chinese Optics Letters》2009年第4期357-360,共4页中国光学快报（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province (No. BK2007204);the Natural Science Foundation of Jiangsu Province Educational Committee (No. 07KJD140208).

摘　　要：Fluorescence spectra of acetic acid-water solution excited by ultraviolet （UV） light are studied, and the relationship between fluorescence spectra and molecular association of acetic acid is discussed. The results indicate that when the exciting light wavelength is longer than 246 nm, there are two fluorescence peaks located at 305 and 334 nm, respectively. By measuring the excitation spectra, the optimal wavelengths of the two fluorescence peaks are obtained, which are 258 and 284 nm, respectively. Fluorescence spectra of acetic acid-water solution change with concentrations, which is primarily attributed to changes of molecular association of acetic acid in aqueous solution. Through theoretical analysis, three variations of molecular association have been obtained in acetic acid-water solution, which are the hydrated monomers, the linear dimers, and the water separated dimers. This research can provide references to studies of molecular association of acetic acid-water, especiMly studies of hydrogen bonds.Fluorescence spectra of acetic acid-water solution excited by ultraviolet （UV） light are studied, and the relationship between fluorescence spectra and molecular association of acetic acid is discussed. The results indicate that when the exciting light wavelength is longer than 246 nm, there are two fluorescence peaks located at 305 and 334 nm, respectively. By measuring the excitation spectra, the optimal wavelengths of the two fluorescence peaks are obtained, which are 258 and 284 nm, respectively. Fluorescence spectra of acetic acid-water solution change with concentrations, which is primarily attributed to changes of molecular association of acetic acid in aqueous solution. Through theoretical analysis, three variations of molecular association have been obtained in acetic acid-water solution, which are the hydrated monomers, the linear dimers, and the water separated dimers. This research can provide references to studies of molecular association of acetic acid-water, especiMly studies of hydrogen bonds.

关 键 词：Acetic acid ACIDS DIMERS FLUORESCENCE HYDRATES Hydrogen Hydrogen bonds Metal analysis Water analysis 

分 类 号：O433[机械工程—光学工程]