Sergey F. Vasilevsky , Eugene V. Tretyakov , Oleg M. Usov , Yuri N. Molin , Sergei V. Fokin , Yuri G. Shwedenkov , Vladimir N. Ikorskii , Galina V. Romanenko , Renad Z. Sagdeev and Victor I. Ovcharenko
Methods of synthesising stable 2-imidazoline nitroxides linked to a pyrazole moiety either directly or through a phenylethynylic bridge have been developed; an unusually strong temperature dependence of µeff for 2-(1-methylpyrazolyl-5)-4,4,5,5-tetramethyl-1-oxyl-2-imidazoline-3-oxide is observed.