HOLE-BURNING AND RESONANT LUMINESCENCE LINE-NARROWING OF [RH(PHPY)2BPY]+ IN GLASSY MATRICES

Persistent hole-burning of the triplet ligand-centred state in [Rh(phpY)2bpy]+ in organic glasses is reported. In the scanning range of +/- 3.8 GHz, no sideholes could be detected. From luminescence-line-narrowing and hole-burning experiments in moderate external magnetic fields of up to 0.83 T, it is concluded that the zero-field splitting is in the range of 9 +/- 3 GHz but not correlated. At 4.2 K, the components of the triplet state are not thermalised, even in a field of 0.83 T. Homogeneous linewidths of 0.35 GHz and 0.8 GHz are deduced for the glycerol glass at 2.1 K and the ethanol: methanol 4:1 (v/v) glass at 1.6 K, respectively.