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Int. J. Mol. Sci. 2008, 9(7), 1321-1332; doi:10.3390/ijms9071321
Article

Application of Electron Paramagnetic Resonance Spectroscopy for Validation of the Novel (AN+DN) Solvent Polarity Scale

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Received: 24 April 2008 / Revised: 3 July 2008 / Accepted: 4 July 2008 / Published: 17 July 2008
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Abstract

Based on solvation studies of polymers, the sum (1:1) of the electron acceptor (AN) and electron donor (DN) values of solvents has been proposed as an alternative polarity scale. To test this, the electron paramagnetic resonance isotropic hyperfine splitting constant, a parameter known to be dependent on the polarity/proticity of the medium, was correlated with the (AN+DN) term using three paramagnetic probes. The linear regression coefficient calculated for 15 different solvents was approximately 0.9, quite similar to those of other well-known polarity parameters, attesting to the validity of the (AN+DN) term as a novel “two-parameter” solvent polarity scale.
Keywords: polarity; solvent; EPR; spin label; isotropic hyperfine splitting constant polarity; solvent; EPR; spin label; isotropic hyperfine splitting constant
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Malavolta, L.; Poletti, E.F.; Silva, E.H.; Schreier, S.; Nakaie, C.R. Application of Electron Paramagnetic Resonance Spectroscopy for Validation of the Novel (AN+DN) Solvent Polarity Scale. Int. J. Mol. Sci. 2008, 9, 1321-1332.

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