Anomalous Dependence of Pyrene Spectra and Lifetimes with Temperature in Large Unilamellar Vesicles from Dioctadecyldimethylammonium Chloride and Dipalmito ylphosp hatidylcholine
Author
dc.contributor.author
Lissi Gervaso, Eduardo A.
Author
dc.contributor.author
Abuin, Elsa
es_CL
Author
dc.contributor.author
Sáez, M.
es_CL
Author
dc.contributor.author
Zanocco Loyola, Antonio
es_CL
Author
dc.contributor.author
Disalvo, A.
es_CL
Admission date
dc.date.accessioned
2014-01-08T20:17:19Z
Available date
dc.date.available
2014-01-08T20:17:19Z
Publication date
dc.date.issued
1992-08
Cita de ítem
dc.identifier.citation
Langmuir 1992 v..8, No. 2 Pages:. 348-350
en_US
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/121725
Abstract
dc.description.abstract
Lifetimes of pyrene incorporated into large unilamellar vesicles of dipalmitoylphosphatidylcholine and
dioctadecyldimethylammonium chloride increase when the temperature increases prior to the melting
temperature of the bilayers. These changes are paralleled by a decrease in the vibronic bands intensity
ratio IIIIIII of the fluorescence spectra, indicative of water expulsion and/or a deeper penetration of the
probe prior to the bilayer phase transition. In DPPC vesicles, both pyrene lifetimes and the I ~ I IrIaIti os
show at the phase transition temperature changes that are indicative of increased water penetration.
en_US
Patrocinador
dc.description.sponsorship
FONDECYT (Grant No. 1035/88) and DICYT (USACH) for financial
support.
Anomalous Dependence of Pyrene Spectra and Lifetimes with Temperature in Large Unilamellar Vesicles from Dioctadecyldimethylammonium Chloride and Dipalmito ylphosp hatidylcholine