ASSIGNMENT OF THE LUMINESCING STATES OF [AU(I)IR(I)(CO)CL(MU-DPPM)(2)][PF6]

Excitation spectra, photoemission spectra, and phosphorescence decay t imes were measured on the title compound. Results are consistent with an Ir(I)-->Au(I) orbital promotion leading to a lowest (1)A(1) state a nd a corresponding low-lying (3)A(1) term that splits into (B-1, B-2) and A(2) states by spin-orbit coupling in approximate C-2v symmetry. A nalysis of T-dependent decay times and emission polarization results i ndicates that the B-1, B-2 states are nearly degenerate and lie approx imate to 90 cm(-1) above the A(2) state that is formally forbidden in C-2v. There is also quadratic dependence of the decay rate of the A(2) state on applied magnetic-field strength.