Electronic Spectra of Single-Crystal Maleonitriledithiolate Complexes of Iridium (I): [Ir(CO)2mnt] TBA (mnt ≡ [S2C2(CN)2]2-; TBA ≡ [(C4H9)4N] + )

Abstract

The polarized optical absorption and emission (spectra, decay times) of single-crystal [lr(CO)2mnt] TBA at temperatures 2 K≦T≤295 K and homogeneous magnetic fields O≦H≦6T are reported. The highly resolved spectra show 0-0 transitions with vibrational satellites and phonon side bands. Applied magnetic fields yield no effect on the emission. The lowest excited electronic states can be assigned to the spin-orbit components A′1 B′1 and B′1 of the charge transfer triplet 3A2 (symmetry C2v)