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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 7, Iss. 4 — Apr. 1, 2009
  • pp: 357–360

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

Caiqin Han, Ying Liu, Yang Yang, Xiaowu Ni, Jian Lu, and Xiaosen Luo  »View Author Affiliations

Chinese Optics Letters, Vol. 7, Issue 4, pp. 357-360 (2009)

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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, especially studies of hydrogen bonds.

© 2009 Chinese Optics Letters

OCIS Codes
(260.2510) Physical optics : Fluorescence
(300.6170) Spectroscopy : Spectra
(300.6390) Spectroscopy : Spectroscopy, molecular
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

Caiqin Han, Ying Liu, Yang Yang, Xiaowu Ni, Jian Lu, and Xiaosen Luo, "Study on fluorescence spectra of molecular association of acetic acid-water," Chin. Opt. Lett. 7, 357-360 (2009)

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