Use of water spin-spin relaxation rate to probe the solvation of cyclodextrins in aqueous solutions

dc.creatorSabadini, E
dc.creatorEgidio, FD
dc.creatorFujiwara, FY
dc.creatorCosgrove, T
dc.date2008
dc.date43891
dc.date2014-11-19T01:01:21Z
dc.date2015-11-26T17:00:17Z
dc.date2014-11-19T01:01:21Z
dc.date2015-11-26T17:00:17Z
dc.date.accessioned2018-03-28T23:48:03Z
dc.date.available2018-03-28T23:48:03Z
dc.identifierJournal Of Physical Chemistry B. Amer Chemical Soc, v. 112, n. 11, n. 3328, n. 3332, 2008.
dc.identifier1520-6106
dc.identifierWOS:000253945900010
dc.identifier10.1021/jp710013h
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/73034
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/73034
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/73034
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1278430
dc.descriptionH-1 spin-spin relaxation rate constant, R-2, of water was measured by using the Carr-Purcell-Meiboom-Gill sequence in aqueous solutions of native cyclodextrins (alpha, beta and gamma-CD) and chemically modified CDs in order to probe the structuring of the water surrounding these cyclic carbohydrate molecules. R-2 values for water in solutions containing glucose and dextran were also measured for comparison. A two-site model for bonded and free water molecules was used to fit the results for the dependence of R-2 on the solute concentrations. The order of relaxation rates for water in aqueous solution at a fixed specific hydroxyl group concentration is glucose > dextran congruent to CDs. No significant difference was observed for R-2 of water in solutions containing native CDs, which indicates that the size and nature of the cavity has a small effect on the spin-spin relaxation times of water. The lower relaxation rate for water in CD solutions was attributed to the intramolecular hydrogen bonding formed between the secondary hydroxyl groups that line the rim of the CDs. For comparison, the relaxation rates for water in solutions of two chemically modified CDs were also studied.
dc.description112
dc.description11
dc.description3328
dc.description3332
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.subjectPolymer Adsorption
dc.subjectSolvent Relaxation
dc.subjectNmr-relaxation
dc.subjectSolubility
dc.subjectParticle
dc.subjectSystems
dc.subjectTimes
dc.titleUse of water spin-spin relaxation rate to probe the solvation of cyclodextrins in aqueous solutions
dc.typeArtículos de revistas


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