Issue 3, 2009
From the journal:

Physical Chemistry Chemical Physics

Time-resolved EPR investigation of [70]fulleropyrrolidine nitroxide isomers†

Fosca Conti,*a   Carlo Corvaja,a   Filippo Busolo,a   Giovanni Zordan,a   Michele Magginia  and  Stefan Weberb  

* Corresponding authors

a Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo, 1, Padova, Italy EU
E-mail: fosca.conti@unipd.it
Fax: +39 (0)49 8275239
Tel: +39 (0)49 8275118

b Institut für Physikalische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr., 21, Freiburg, Germany EU

Abstract

A novel [70]fulleropyrrolidine functionalized with a nitroxide radical has been synthesized. After pulsed photoexcitation, time-resolved electron paramagnetic resonance (EPR) spectra have been recorded in liquid solution at standard X-band (9.5 GHz) and W-band (95 GHz) microwave frequencies. The spectra exhibit strongly electron spin polarized ground and excited states, the latter being arising from the spin coupling of the nitroxide’s electron spin with the fullerene’s excited triplet state. The EPR parameters such as g-values and hyperfine coupling constants have been discussed in terms of the spin Hamiltonian for excited doublet, triplet and quartet states. On the basis of the strength of the exchange interaction between the fullerene triplet and the radical group, two, out of a possible four [70]fulleropyrrolidine isomeric monoadducts, have been characterized.

Graphical abstract: Time-resolved EPR investigation of [70]fulleropyrrolidine nitroxide isomers

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Article information

DOI
https://doi.org/10.1039/B813238K
Article type
Paper
Submitted
01 Aug 2008
Accepted
14 Oct 2008
First published
12 Nov 2008

Phys. Chem. Chem. Phys., 2009,11, 495-502

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Time-resolved EPR investigation of [70]fulleropyrrolidine nitroxide isomers

F. Conti, C. Corvaja, F. Busolo, G. Zordan, M. Maggini and S. Weber, Phys. Chem. Chem. Phys., 2009, 11, 495 DOI: 10.1039/B813238K

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