Donato, D. I. and Jannelli, M. P. and Magazzù, S. and Majolino, D. and Migliardo, P. (1994) Determinazione del fattore di correlazione di Kirkwood da misure di permittività dielettrica e di assorbimento FTIR per lo studfio di meccanismi di crescita inliquidi associati. Accademia Peloritana dei Pericolanti Classe FF.MM.NN., LXXII (Supplement 1). pp. 453-464.
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Abstract
A detailed vibrational and permettivity study, performed on associated liquids (alcohols) “dispersed” in $CCl_4$, is presented. The experimentally obtained data, taken at a concentration limit as low as $l0^-^3M$ allow to explain the growth mechanism present in such systems (normal-pentanol and 2-methyl-2-butanol), starting from the monomeric state up to oligomers, by increasing the concentration values. Furthermore the behavior of the measured Kirkwood correlation factor $g_k$ indicates that the cychc speeies ($g_k < 1$) are the first existing aggregates, independently from the systems. The interaction among the monomers induces anharmonic effects into the original $o-H$ stretching, lowering the center frequencies and enlarging the linewidths. When the concentration increases the more hindered alcohol (2M-2BuOH) reveals mainly the existence of cyclic dimers ($g_k$ < 1), whereas a growth process of linear $n$-mers is evidenciated for the linear normal-pentanol width a simultaneous disappearance of the cyclic structures.
| Item Type: | Article |
|---|---|
| Subjects: | M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Fisiche, Matematiche e Naturali > 1994 > Supplemento 1 parte 2 M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Medico-Biologiche > 1994 > Supplemento 1 parte 2 M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Giuridiche, Economiche e Politiche > 1994 > Supplemento 1 parte 2 M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Lettere Filosofia e belle Arti > 1994 > Supplemento 1 parte 2 |
| Depositing User: | Mr Nunzio Femminò |
| Date Deposited: | 17 Apr 2014 09:36 |
| Last Modified: | 17 Apr 2014 09:36 |
| URI: | http://cab.unime.it/mus/id/eprint/5166 |
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