Mobility of spin probes in viscous cyclodextrin solutions

Gabriela Ionita; Victor Chechik

doi:10.1039/b924092f

Mobility of spin probes in viscous cyclodextrin solutions

Gabriela Ionita, Victor Chechik

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

TEMPO-based spin probes and beta-cyclodextrin form 1 : 2 guest-host complexes in viscous aqueous glycerol solutions at low temperatures. The spin probe mobility in these complexes is much higher than in the bulk glassy solution. The similar tumbling rates of the spin probe in viscous host-guest complexes and in solvent-free complexes suggest that the complexation effectively shields the nitroxide unit from the solvent molecules. This is consistent with the low activation barrier for molecular tumbling of immobilised label.

Original language	English
Pages (from-to)	6956-6960
Number of pages	5
Journal	Physical Chemistry Chemical Physics
Volume	12
Issue number	26
DOIs	https://doi.org/10.1039/b924092f
Publication status	Published - 14 Jul 2010

Keywords

INCLUSION COMPLEXES
SUPEROXIDE
NITROXIDE
RESONANCE

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abstract = "TEMPO-based spin probes and beta-cyclodextrin form 1 : 2 guest-host complexes in viscous aqueous glycerol solutions at low temperatures. The spin probe mobility in these complexes is much higher than in the bulk glassy solution. The similar tumbling rates of the spin probe in viscous host-guest complexes and in solvent-free complexes suggest that the complexation effectively shields the nitroxide unit from the solvent molecules. This is consistent with the low activation barrier for molecular tumbling of immobilised label.",

keywords = "INCLUSION COMPLEXES, SUPEROXIDE, NITROXIDE, RESONANCE",

author = "Gabriela Ionita and Victor Chechik",

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AU - Ionita, Gabriela

AU - Chechik, Victor

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N2 - TEMPO-based spin probes and beta-cyclodextrin form 1 : 2 guest-host complexes in viscous aqueous glycerol solutions at low temperatures. The spin probe mobility in these complexes is much higher than in the bulk glassy solution. The similar tumbling rates of the spin probe in viscous host-guest complexes and in solvent-free complexes suggest that the complexation effectively shields the nitroxide unit from the solvent molecules. This is consistent with the low activation barrier for molecular tumbling of immobilised label.

AB - TEMPO-based spin probes and beta-cyclodextrin form 1 : 2 guest-host complexes in viscous aqueous glycerol solutions at low temperatures. The spin probe mobility in these complexes is much higher than in the bulk glassy solution. The similar tumbling rates of the spin probe in viscous host-guest complexes and in solvent-free complexes suggest that the complexation effectively shields the nitroxide unit from the solvent molecules. This is consistent with the low activation barrier for molecular tumbling of immobilised label.

KW - INCLUSION COMPLEXES

KW - SUPEROXIDE

KW - NITROXIDE

KW - RESONANCE

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U2 - 10.1039/b924092f

DO - 10.1039/b924092f

M3 - Article

SN - 1463-9076

VL - 12

SP - 6956

EP - 6960

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 26

ER -

Mobility of spin probes in viscous cyclodextrin solutions

Abstract

Keywords

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