“…22 A three-component ESR signal has recently been observed by S. Hase et al for phenol-and phenoxide-substituted nitronyl nitroxide biradicals in a glassy solution of toluene. 28 The two main features were assigned to randomly oriented triplet species (S total ¼ 1) and a weak central peak was attributed to a small amount of monoradical (S ¼ 1/2) impurity. In our films, the two lines at 2.024 and 1.980 could be due to TTF-(OH)TEMPO radicals associated into dimers for which S total ¼ 1.…”