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Estimation of Absolute Spin Counts in Nitronyl Nitroxide-Bearing Graphene Nanoribbons

by Dmitri Stass 1,2 and Evgeny Tretyakov 2,3,*
1
Voevodsky Institute of Chemical Kinetics and Combustion, 3 Institutskaya Str., 630090 Novosibirsk, Russia
2
Novosibirsk State University, 2 Pirogova Str., 630090 Novosibirsk, Russia
3
Vorozhtsov Novosibirsk Institute of Organic Chemistry, 9 Ac. Lavrentiev Avenue, 630090 Novosibirsk, Russia
*
Author to whom correspondence should be addressed.
Magnetochemistry 2019, 5(2), 32; https://doi.org/10.3390/magnetochemistry5020032
Received: 12 April 2019 / Revised: 4 May 2019 / Accepted: 20 May 2019 / Published: 29 May 2019
(This article belongs to the Special Issue Controlling Molecular Nanomagnets)
The degrees of spin labeling of a polyphenylene-based polymer and its graphitized derivative with a stable nitronyl nitroxide were evaluated by estimating the absolute numbers of spins in a set of samples using continuous wave (CW) electron spin resonance (ESR). For these particular systems, the degrees of spin labeling were found to be approximately 0.8% and 1.3%, respectively. The developed procedure complements the more advanced time-resolved/cryogenic ESR studies on these systems by focusing on the stable spin labels introduced in these magnetically intricate materials and providing an estimate of their absolute amount, which is indispensable in the development of synthetic approaches to prepare modified graphene systems and for evaluating the success of these systems. View Full-Text
Keywords: nitronyl nitroxides; high-spin molecules; magnetic polymers; graphene nanoribbons nitronyl nitroxides; high-spin molecules; magnetic polymers; graphene nanoribbons
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Stass, D.; Tretyakov, E. Estimation of Absolute Spin Counts in Nitronyl Nitroxide-Bearing Graphene Nanoribbons. Magnetochemistry 2019, 5, 32.

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