Thermal behavior of several stable hydrazyl free radicals and of their parent hydrazines
A thermal analysis study has been performed for the stable free radical 2,2-diphenyl-1-picrylhydrazyl and other ten free radical congeners, together with their corresponding parent hydrazines. Qualitative studies on the decomposition products showed that nitrogen dioxide plays a key role. A mechanistic decomposition pathway is also proposed.
KeywordsDPPH Hydrazyl Free radical DTA TG
This work was supported by a Grant of the Romanian National Authority for Scientific Research, CNCS—UEFISCDI, Project Number PN-II-ID-PCE-2011-3-0408.
- 4.Ionita P. Is DPPH stable free radical a good scavenger for oxygen active species? Chem Papers. 2005;59:11–6.Google Scholar
- 12.Ionita P, Caproiu MT, Balaban AT. New sulfonyl derivatives of 2,2-diphenyl-1-picrylhydrazyl and their supramolecular complexes with crown ethers or kryptands. Rev Roum Chim. 2000;45:935–41.Google Scholar