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Fig. 3. Temperature dependence of emission decay (k,,) of neat crystals of [Ru(bpy),] (PF,), (C1) and [Ru(bpy), IC], -6H,O (@).  ture dependence of emission decay was observed; the smaller extent of frequency factors (<2 x 10° s_') implies that the emitting state undergoes radia- tive transition and radialtionless transition via weak coupling. In the 370-586 K range, the decay rate of emission increased with temperature from 1.3 x 10° s' at 377 K to 1.7X10’ s~' at 586 K. The Arrhenius parameters, i.e. a frequency factor of 7 x 10'' s~' and an activation energy of 4400 cm™', were obtained.

Figure 3 Temperature dependence of emission decay (k,,) of neat crystals of [Ru(bpy),] (PF,), (C1) and [Ru(bpy), IC], -6H,O (@). ture dependence of emission decay was observed; the smaller extent of frequency factors (<2 x 10° s_') implies that the emitting state undergoes radia- tive transition and radialtionless transition via weak coupling. In the 370-586 K range, the decay rate of emission increased with temperature from 1.3 x 10° s' at 377 K to 1.7X10’ s~' at 586 K. The Arrhenius parameters, i.e. a frequency factor of 7 x 10'' s~' and an activation energy of 4400 cm™', were obtained.