ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The distributions of the 2E and the 4A2 splittings of Cr(III) tris(2,2'-bipyridine) embedded in a wide range of amorphous hosts are investigated by means of luminescence line narrowing and hole-burning spectroscopies. A large spread of the 2E splitting is observed for all amorphous matrices and this is attributed mainly to low symmetry field contributions. A simple model is proposed which rationalizes the observed non-Gaussian distribution of R2 energies as a function of the selected R1 energy. The zero field splitting of the 4A2 ground state also shows a significant variation in all the investigated samples. An important conclusion is that optically detected magnetic resonance and electron paramagnetic resonance measurements of transition metal complexes in amorphous hosts need to be interpreted with care. The homogeneous linewidth of the R1 line was measured at 1.5 K for five hosts and ranged from 80 MHz in glycerol to 460 MHz in 4:1 ethanol/methanol.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.463465
