Intermolecular interactions in aqueous solutions of gallic acid at 296᾿06 K according to spectrofluorimetry and densimetry data

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• 作者：K. R. Grigoryan ; L. S. Sargsyan
• 关键词：gallic acid ; densimetry ; apparent molar volume ; fluorescence spectroscopy ; three ; dimensional excitation/emission matrix fluorescence spectroscopy ; 3D spectra
• 刊名：Russian Journal of Physical Chemistry A, Focus on Chemistry
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：89
• 期：12
• 页码：2234-2237
• 全文大小：428 KB
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• 作者单位：K. R. Grigoryan (1)
  L. S. Sargsyan (1)
  
  1. Yerevan State University, Yerevan, 0025, Armenia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1531-863X

文摘

Features of intermolecular interactions in aqueous solutions of gallic acid (GA) are studied by means of densimetry and fluorescence spectroscopy (intrinsic fluorescence, 2D spectra, and excitation/ emission matrix fluorescence spectra, 3D) at 296.15, 301.15, and 306.15 K in the concentration range of 5.88 × 10−4–5.88 × 10−2 mol L−1. It is shown by analyzing the concentration and temperature dependences of the apparent molar volumes and fluorescence parameters of GA that the equilibrium between nonassociated and associated species in the solution and the hydration of these species undergo changes.