Issue 4, 2009
From the journal:

Chemical Communications

Relaxation rates for spirocyclohexyl nitroxyl radicals are suitable for interspin distance measurements at temperatures up to about 125 K†

Velavan Kathirvelu,a   Christopher Smith,a   Christopher Parks,a   Md. Abdul Mannan,b   Yozo Miura,b   Keizo Takeshita,c   Sandra S. Eatona  and  Gareth R. Eaton*a  

* Corresponding authors

a Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado, USA
E-mail: geaton@du.edu
Fax: +1 (0)303 871 2254
Tel: +1 (0)303 871 2980

b Graduate School of Engineering, Osaka City University, Osaka, Japan
E-mail: yoshimiu0626@yahoo.co.jp
Fax: +81 (0)66849 6906
Tel: +81 (0)66849 6906

c Faculty of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
E-mail: keizo@ph.sojo-u.ac.jp
Fax: +81 (0)96 326 5048
Tel: +81 (0)96 326 4147

Abstract

Between 65 and 175 K, nitroxyl radicals with spirocyclohexyl groups at the 2- and 6-positions of the piperidine ring exhibit spin echo dephasing rates that are slower than for nitroxyl radicals with 2,5-gem-dimethyl or 2,6-gem-dimethyl substituents that are currently used as spin labels, and are slow enough to permit DEER measurements at temperatures up to about 125 K for spin labels with analogous ring structures.

Graphical abstract: Relaxation rates for spirocyclohexyl nitroxyl radicals are suitable for interspin distance measurements at temperatures up to about 125 K

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Article information

DOI
https://doi.org/10.1039/B817758A
Article type
Communication
Submitted
09 Oct 2008
Accepted
31 Oct 2008
First published
25 Nov 2008

Chem. Commun., 2009, 454-456

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Relaxation rates for spirocyclohexyl nitroxyl radicals are suitable for interspin distance measurements at temperatures up to about 125 K

V. Kathirvelu, C. Smith, C. Parks, Md. A. Mannan, Y. Miura, K. Takeshita, S. S. Eaton and G. R. Eaton, Chem. Commun., 2009, 454 DOI: 10.1039/B817758A

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