ESR measurements of the partitioning of some new spin probes in n-octanol-water

Bottle, Steven E., Gillies, Duncan G., Micallef, Aaron S., Reid, Damien A., & Sutcliffe, Leslie H. (1999) ESR measurements of the partitioning of some new spin probes in n-octanol-water. Magnetic Resonance in Chemistry, 37(10), pp. 730-734.

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Abstract

The stable free radical 1,1,3,3-tetramethylisoindolin-2-yloxyl (TMIO) has proved to be very suitable for use as a spin probe for a number of applications. Because it is soluble mainly in non-polar liquids, there is a need for new derivatives that can be used in a variety of environments. This has been done by introducing substituents in the 5-position of the aromatic ring, namely carboxyl (CTMIO), trimethylamino (TMTMIOI) and sodium sulphonate (NaTMIOS). An accurate ESR method was developed for the measurement of partition coefficients in n-octanol–water. For comparison purposes the method was also applied to some Tempo derivatives. The effect of temperature on the rotational correlation times and the nitrogen-14 hyperfine coupling constant of some of the spin probes was investigated. There is evidence for dimerization of CTMIO to form a biradical

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ID Code: 90699
Item Type: Journal Article
Refereed: Yes
Keywords: spin probes, ESR, n-octanol–water partitioning
DOI: 10.1002/(SICI)1097-458X(199910)37:10<730::AID-MRC530>3.0.CO;2-E
ISSN: 0749-1581
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100) > Instrumental Methods (excl. Immunological and Bioassay Methods) (030105)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ORGANIC CHEMISTRY (030500) > Free Radical Chemistry (030501)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ORGANIC CHEMISTRY (030500) > Physical Organic Chemistry (030505)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 1999 John Wiley & Sons, Ltd.
Deposited On: 24 Nov 2015 01:43
Last Modified: 24 Nov 2015 03:28

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