2-(35-Diethynypheny)-4455-tetramethy-45-dihydr-H-imidaz--xy-3-xide (1) was polymerized by oxidative coupling to poly(2-(3,5-diethynylenephenyl)-4,4,5,5-tetramethyl-4,5-dihydro-lH-imidazol-1- oxyl-3-oxide) (2), which was characterized by gel permeation chromatography, spectroscopic methods (infrared, ultraviolet, electron spin resonance), transmission electron microscopy and magnetic susceptibility measurements. Samples of polymer 2 obtained by evaporation of the solvent showed the usual paramagnetic properties while those obtained by addition of a non-solvent to a solution exhibited an increase of the magnetic mass susceptibility ~m when the samples were stored at a temperature of 78 K.
Посилання на статтю:
Influence of the precipitation method on the magnetic properties of a polyradical with conjugation in the backbone and nitronyl nitroxide side groups / Robert Saf, Dominik Hengg and Klaus Hummel // Polymer. – 1993. – Vol 34. – P. 2680-2683.