Effect of cations and anions on the formation of polypseudorotaxanes

dc.creatorLo Nostro, P
dc.creatorLopes, JR
dc.creatorNinham, BW
dc.creatorBaglioni, P
dc.date2002
dc.date39142
dc.date2014-11-19T18:32:18Z
dc.date2015-11-26T17:30:12Z
dc.date2014-11-19T18:32:18Z
dc.date2015-11-26T17:30:12Z
dc.date.accessioned2018-03-29T00:17:10Z
dc.date.available2018-03-29T00:17:10Z
dc.identifierJournal Of Physical Chemistry B. Amer Chemical Soc, v. 106, n. 9, n. 2166, n. 2174, 2002.
dc.identifier1520-6106
dc.identifierWOS:000174403200009
dc.identifier10.1021/jp0129151
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63790
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/63790
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63790
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285464
dc.descriptionAqueous solutions of alpha-, beta-, or gamma-cyclodextrin form stable and crystallizable inclusion complexes (polypseudorotaxanes) when added to long chain polymers such as PEG, PPG, and alkanols. This process consists of the threading of several cyclodextrin molecules around a single chain, with a kinetic profile that depends on temperature and solvent nature. We have studied the effect of salts on this threading process for a polypropylene glycol derivative with,beta-cyclodextrin at 25 degreesC. What emerges is that changes in the threading time are strongly dependent on the nature of both cations and anions. The formation of a polypseudorotaxane is then a process where hydrophobic forces clearly play a dominant role, and in this paper, we show that the diversity of salt effects is related to the microscopic frequency dependent dielectric properties of the ion pair, that account for the dispersion potential experienced by the different ions in solution.
dc.description106
dc.description9
dc.description2166
dc.description2174
dc.languageen
dc.publisherAmer Chemical Soc
dc.publisherWashington
dc.publisherEUA
dc.relationJournal Of Physical Chemistry B
dc.relationJ. Phys. Chem. B
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectGlycol) Triblock Copolymer
dc.subjectInclusion Complexes
dc.subjectHydrophobic Interactions
dc.subjectPoly(propylene Glycol)
dc.subjectPoly(ethylene Glycol)
dc.subjectBeta-cyclodextrins
dc.subjectIon-binding
dc.subjectPolyrotaxane
dc.subjectStability
dc.subjectHydration
dc.titleEffect of cations and anions on the formation of polypseudorotaxanes
dc.typeArtículos de revistas


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