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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.7b01923
|2 doi
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|a eng
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|a Valente, A J M
|e verfasserin
|4 aut
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|a Molecular Dynamics of Cyclodextrins in Water Solutions from NMR Deuterium Relaxation
|b Implications for Cyclodextrin Aggregation
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|c 2017
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|a Text
|b txt
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|a ƒaComputermedien
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|a Date Completed 23.07.2018
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|a Date Revised 23.07.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The aggregation of the most common natural cyclodextrins (α-, β-, and γ-) in aqueous solutions is addressed by studying the CD-CD interactions using deuterium relaxation rates for deuterium labeled CDs. Relaxation times (T1) and their corresponding relaxation rates (R1 = 1/T1) provide information about the rotational correlation times of CDs and serve as a proxy for solute-solute interactions. Measured T1's for α-, β-, and γ-CD at the lowest CD concentrations were in agreement with predictions of a hydrodynamic model for toroids, in particular with regard to the dependence of T1 on CD size. On the other hand, the dependence of T1's with respect to the increase in CD concentration could not be explained by hydrodynamic or direct interaction between CD molecules, and it is suggested that there is an equilibrium between monomeric and dimeric CD to account for the observed concentration dependence. No evidence in favor of large aggregates of CDs involving a non-negligible fraction was found for the investigated CDs
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carvalho, R A
|e verfasserin
|4 aut
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|a Murtinho, D
|e verfasserin
|4 aut
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|a Söderman, O
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 33(2017), 33 vom: 22. Aug., Seite 8233-8238
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|x 1520-5827
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|g volume:33
|g year:2017
|g number:33
|g day:22
|g month:08
|g pages:8233-8238
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|u http://dx.doi.org/10.1021/acs.langmuir.7b01923
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