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


Autoria(s): MALAVOLTA, Luciana; POLETTI, Erick F.; SILVA, Elias H.; SCHREIER, Shirley; NAKAIE, Clovis R.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/04/2012

19/04/2012

2008

Resumo

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.

Identificador

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, v.9, n.7, p.1321-1332, 2008

1422-0067

http://producao.usp.br/handle/BDPI/16751

10.3390/ijms9071321

http://dx.doi.org/10.3390/ijms9071321

Idioma(s)

eng

Publicador

MOLECULAR DIVERSITY PRESERVATION INT

Relação

International Journal of Molecular Sciences

Direitos

openAccess

Copyright MOLECULAR DIVERSITY PRESERVATION INT

Palavras-Chave #polarity #solvent #EPR #spin label #isotropic hyperfine splitting constant #PEPTIDE-SYNTHESIS #SPIN LABELS #AMINO-ACID #WATER PENETRATION #RESIN SOLVATION #EPR PARAMETERS #NITROXIDES #DEPENDENCE #MICROENVIRONMENT #CHEMISTRY #Chemistry, Multidisciplinary
Tipo

article

original article

publishedVersion