• N.N. Denisov, V.I. Krinichnyi, V.A. Nadtochenko, Spin properties of paramagnetic centers photogenerated in crystals of complexes between C₆₀ and TPA, in Fullerenes. Recent Advances in the Chemistryand Physics of Fullerenes and Related Materials (eds. K. Kadish, R. Ruoff), 97-14, The Electrochemical Society Inc., Pennington, 1997, p. 13.

Abstract. Paramagnetic centers photogenerated in crystals of C₆₀:TPA complexes were studied by 3-cm and 2-mm EPR. Two types of centers with different relaxation and dynamic behavior were found. The temperature dependence of the rotation frequency demonstrates the phase transition.