Synthesis, Characterization, and Photophysical Properties of a Thiophene-Functionalized Bis(Pyrazolyl) Pyridine (BPP) Tricarbonyl Rhenium(I) Complex
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A bromo tricarbonyl rhenium(I) complex with a thiophene-functionalized bis(pyrazolyl) pyridine ligand (L), ReBr(L)(CO)(3) (1), has been synthesized and characterized by variable temperature and COSY 2-D H-1 NMR spectroscopy, single-crystal X-ray diffraction, and photophysical methods. Complex 1 is highly luminescent in both solution and solid-state, consistent with phosphorescence from an emissive (MLCT)-M-3 excited state with an additional contribution from a LC (3)(pi ->pi*) transition. The single-crystal X-ray diffraction structure of the title ligand is also reported.