Article 6114

Title of the article

FREE RADICALS AND ORGANIC PARAMAGNETICS

Authors

Gol'dfeyn Mark Davidovich, Doctor of chemical sciences, professor, head of sub-department of environment protection and life safety, Saratov State University named after N. G. Chernyshevsky (83 Astrakhanskaya street, Saratov, Russia), goldfeinmd@mail.ru
Rozantsev Eduard Grigor'evich, Honoured worker of science and technology of Russia, laureate of the State award, doctor of chemical sciences, professor

Index UDK

547.024+541.515

Abstract

Background. topicality of the subject of this article is defined, firstly, by fundamental properties, structure and reactivity of free radicals and organic paramagnetics, and secondly, by their practical importance for the majority of the chemical processes taking place in animate and inanimate nature. In this regard, the purpose of this paper is to show the possibility of synthesis of free radicals possessing paramagnetism, which is the main reason for the diversity of their unique properties.
Materials and methods. The primary material for the preparative chemistry of free radicals, including stable radicals, is a number of substances of peroxides, azonitriles, piperidine derivatives, etc. Flash photolysis and radiolysis, thermolysis and solvolysis, sonochemical and electrochemical methods are the regeneration methods of free radicals and organic paramagnetics. The main methods for studying the structure, properties and reactivity of free radicals are quantum-chemical calculations, as well as the methods of electron paramagnetic resonance and nuclear magnetic resonance.
Results. The results of studies presented in this article include information about the diversity of properties of organic paramagnetics of completely different types – aroksils, nitroxides (iminoxils and aromatic nitroxides), verdazyls, gidrazils, radicals of imidazoline series – and their implementation in basic research and various critical technologies.
Conclusions. Well-known and newly synthesized free radicals need to be constantly studied, as they are the most important chemical agent.

Key words

concept, free radical, organic paramagnetic, research, response, texture, structure, properties, reaction capacity.

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References

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2. Gol'dfeyn M. D., Ivanov A. V., Malikov A. N. Kontseptsii sovremennogo estestvoznaniya. Kurs lektsiy [Concepts of modern natural science. Course of lectures]. Moscow: Izd-vo RGTEU, 2009, 220 p.
3. Diploma of invention № 248, 05.10.1983. Rozantsev E. G., Lebedev O. P., Kazarnovskiy S. N.
4. Volodarskiy L. B., Grigor'ev I. A., Dikanov S. A., Reznikov V. A., Shchukin G. I.
Imidazolinovye iminoksil'nye radikaly [Imidazoline iminoxil radicals]. Novosibirsk: Nauka, 1988, 216 p.
5. Semenov N. N. Tsepnye reaktsii [Chain reactions]. Moscow: Nauka, 1986, 535 p.

 

Дата создания: 09.07.2014 11:13
Дата обновления: 09.07.2014 11:50