Issue 22, 2011
From the journal:

Chemical Communications

Calix[4]arene nitroxide tetraradical and octaradical†‡

Arnon Olankitwanit,a   Velavan Kathirvelu,b   Suchada Rajca,a   Gareth R. Eaton,b   Sandra S. Eaton*b  and  Andrzej Rajca*a  

* Corresponding authors

a Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304, USA
E-mail: arajca1@unl.edu
Fax: +1 402-472-9402
Tel: +1 402-472-9196

b Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208-2436, USA
E-mail: seaton@du.edu
Fax: +1 303-871-2254
Tel: +1 303-871-3102

Abstract

1,3-Alternate calix[4]arene with para-phenylene spacers connecting nitroxide monoradicals and high-spin (S = 1) diradicals provides tetraradical and octaradical scaffolds that possess conformations with slow electron spin relaxation rates (1/T1). Such scaffolds may facilitate tuning of relaxation rates that are more favorable for MRI or DNP applications.

Graphical abstract: Calix[4]arene nitroxide tetraradical and octaradical

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Article information

DOI
https://doi.org/10.1039/C1CC11172H
Article type
Communication
Submitted
27 fev 2011
Accepted
18 abr 2011
First published
04 mai 2011

Chem. Commun., 2011,47, 6443-6445

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Calix[4]arene nitroxide tetraradical and octaradical

A. Olankitwanit, V. Kathirvelu, S. Rajca, G. R. Eaton, S. S. Eaton and A. Rajca, Chem. Commun., 2011, 47, 6443 DOI: 10.1039/C1CC11172H

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