Hole burning on a triplet-triplet transition: 2,2-dinaphthylcarbene in n-hexane at 1.7K

Holes were burned in the 0,0 triplet-triplet fluorescence excitation line o f 2,2-dinaphthylcarbene in n-hexane at 1.7 K. The pattern of holes was expl ained by taking into account the zero-field splitting of both triplet state s involved in the transition and some assumptions made about the excitation energy relaxation channels. Under external magnetic field the spectrum of holes changed, confirming the triplet character of the ground and lowest ex cited states. (C) 2000 Elsevier Science B.V. All rights reserved.