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EnglishOn the basis of the two-state model of a polyelectrolyte solution, the ion concentration in the polymer domain has been calculated by using the spherical Poisson-Boltzmann equation. The ion accumulation in the neighboring of the polyion influences, on different time scales, various electrical properties of the solution, in particular the low-frequency electrical conductivity and the high-frequency dielectric dispersion. These predictions have been compared with recent dielectric measurements on poly(L-glutamic acid) aqueous solutions during the conformational transition from the alpha-helix to random coil, and a satisfactory agreement has been found. This finding suggests that counterion distribution plays a different role in determining the electrical properties of charged polymer solutions, causing a electrophoretic contribution of the polymer domain to the electrical conductivity and influencing the high-frequency dielectric dispersion.
Bordi, F., Cametti, C., & Paradossi, G. (1993). Effect of counterion concentration on the dielectric behavior of a polypeptidic chain in the helix-coil transition. BIOPOLYMERS, 33(7), 1029-1035.
| Tipologia: | Articolo su rivista |
| Citazione: | Bordi, F., Cametti, C., & Paradossi, G. (1993). Effect of counterion concentration on the dielectric behavior of a polypeptidic chain in the helix-coil transition. BIOPOLYMERS, 33(7), 1029-1035. |
| IF: | Con Impact Factor ISI |
| Lingua: | English |
| Settore Scientifico Disciplinare: | Settore CHIM/02 - Chimica Fisica |
| Revisione (peer review): | Sì, ma tipo non specificato |
| Tipo: | Articolo |
| Rilevanza: | Rilevanza internazionale |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1002/bip.360330705 |
| Stato di pubblicazione: | Pubblicato |
| Data di pubblicazione: | 1993 |
| Titolo: | Effect of counterion concentration on the dielectric behavior of a polypeptidic chain in the helix-coil transition |
| Autori: | |
| Autori: | Bordi, F; Cametti, C; Paradossi, G |
| Appare nelle tipologie: | 01 - Articolo su rivista |
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