Application of electron paramagnetic resonance Spectroscopy for validation of the novel (AN plus DN) solvent polarity scale

• Autor(a) principal: Malavolta, Luciana [UNIFESP]
• Data de Publicação: 2008
• Outros Autores: Poletti, Erick F. [UNIFESP], Silva, Elias H. [UNIFESP], Schreier, Shirley, Nakaie, Clovis R. [UNIFESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNIFESP
• Texto Completo: http://dx.doi.org/10.3390/ijms9071321; http://repositorio.unifesp.br/handle/11600/30751
• topic: polarity; solvent; EPR; spin label; isotropic hyperfine splitting constant

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.