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Journal of Physical Chemistry, Vol.99, No.28, 11041-11045, 1995
Assignment of the Luminescing States of ((Aurhi)-Rh-I((T)Bunc)(2)(Mu-dppm)(2))(PF6)(2)
Fluorescence, phosphorescence, and excitation spectra were measured on the title compound. These results were augmented with polarization ratios obtained at 77 K and detailed studies of the temperature dependence of the phosphorescence in the 77-4 K range. The phosphorescence decay rate at 4 K was also recorded as a function of an applied magnetic field. Ah the results are consistent with a 4d(2)Rh(1) --> 6p(z)Au(1) orbital promotion leading to emitting (1)A(1), (3)A(1) terms in pseudo-C-2v symmetry. The (3)A(1) term is split by spin-orbit coupling into a forbidden A(2) state lying lowest followed by a quasi-degenerate pair, [B-i(x), B-2(y)] lying similar to 16 cm(-1) higher that decays >500 times faster than the lowest one.
Keywords:METAL-METAL INTERACTIONS;EXCITED-STATES;ELECTRONIC SPECTROSCOPY;TRANSITION-ELEMENTS;QUANTUM YIELD;COMPLEXES;RHODIUM(I);PT2(P2O5H2)44;CHEMISTRY