Issue 16, 2004
From the journal:

Organic & Biomolecular Chemistry

Role of hydroxyl concentrations in solvatochromic measures of solvent polarity of alcohols and alcohol–water mixtures—evidence that preferential solvation effects may be overestimated

T. William Bentley*a  and  In Sun Koob  

* Corresponding authors

a Department of Chemistry, University of Wales, Swansea, Singleton Park, Swansea, Wales, UK
E-mail: cmsolvol@swansea.ac.uk

b Department of Chemical Education and the Research Institute of Natural Science, Gyeongsang National University, Jinju, Korea

Abstract

For single solvents, primary alcohols and water, there is a good linear correlation (r = 0.994) between the solvent polarity index ET(30) and the molar concentration of OH groups (or 1000/Vm, where Vm is the solvent molar volume). The corresponding correlations for alcohol–water mixtures are plots vs. the sum of molar concentrations of alcohol and water, alternatively expressed as plots of ET(30) vs. volume fraction. Our quantitative treatment is an extension of recent theoretical and experimental results. In contrast, previous studies of alcohol–water mixtures have relied on plots of ET(30) vs. mole fraction, and have overestimated the effect of preferential solvation of solvatochromic dyes by the more hydrophobic alcohols.

Graphical abstract: Role of hydroxyl concentrations in solvatochromic measures of solvent polarity of alcohols and alcohol–water mixtures—evidence that preferential solvation effects may be overestimated

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Article information

DOI
https://doi.org/10.1039/B408052C
Article type
Paper
Submitted
27 May 2004
Accepted
22 Jun 2004
First published
28 Jul 2004

Org. Biomol. Chem., 2004,2, 2376-2380

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Role of hydroxyl concentrations in solvatochromic measures of solvent polarity of alcohols and alcohol–water mixtures—evidence that preferential solvation effects may be overestimated

T. W. Bentley and I. S. Koo, Org. Biomol. Chem., 2004, 2, 2376 DOI: 10.1039/B408052C

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