Author | dc.contributor.author | Donoso, J. P. | |
Author | dc.contributor.author | Tambelli, C. E. | es_CL |
Author | dc.contributor.author | Magon, C. J. | es_CL |
Author | dc.contributor.author | Mattos, R. I. | es_CL |
Author | dc.contributor.author | Silva, I. D. A. | es_CL |
Author | dc.contributor.author | De Souza, J. E. | es_CL |
Author | dc.contributor.author | Moreno, M. | es_CL |
Author | dc.contributor.author | Benavente Espinosa, Eglantina | es_CL |
Author | dc.contributor.author | González Moraga, Guillermo | es_CL |
Admission date | dc.date.accessioned | 2011-09-29T13:50:27Z | |
Available date | dc.date.available | 2011-09-29T13:50:27Z | |
Publication date | dc.date.issued | 2010 | |
Cita de ítem | dc.identifier.citation | MOLECULAR CRYSTALS AND LIQUID CRYSTALS, Volume: 521, Pages: 93-103, 2010 | es_CL |
Identifier | dc.identifier.issn | 1542-1406 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/119300 | |
General note | dc.description | Artículo de publicación ISI | es_CL |
Abstract | dc.description.abstract | Impedance spectroscopy and nuclear magnetic resonance (NMR) were used to
investigate the mobility of water molecules located in the interlayer space of Hþ –
exchanged bentonite clay. The conductivity obtained by ac measurements was
1.25 10 4 S=cm at 298 K. Proton (1H) lineshapes and spin-lattice relaxation
times were measured as a function of temperature over the temperature range
130–320 K. The NMR experiments exhibit the qualitative features associated with
the proton motion, namely the presence of a 1H NMR line narrowing and a
well-defined spin-lattice relaxation rate maximum. The temperature dependence of
the proton spin-lattice relaxation rates was analyzed with the spectral density function
appropriate for proton dynamics in a two-dimensional system. The self-diffusion
coefficient estimated from our NMR data, D 2 10 7 cm2=s at 300 K, is consistent
with those reported for exchanged montmorillonite clay hydrates studied by
NMR and quasi-elastic neutron scattering (QNS). | es_CL |
Patrocinador | dc.description.sponsorship | Research partially
financed by FONDECYT (Contracts 1090282, 1070195), Basal Financing Program
CONICYT, FB0807 (CEDENNA), Millenium Science Nucleus P06-022-F. | es_CL |
Lenguage | dc.language.iso | en | es_CL |
Publisher | dc.publisher | TAYLOR & FRANCIS LTD | es_CL |
Keywords | dc.subject | Bentonite | es_CL |
Título | dc.title | Nuclear Magnetic Resonance Study of Hydrated Bentonite | es_CL |
Document type | dc.type | Artículo de revista | |