Synthesis, characterization, and photophysical properties of a thiophene-functionalized bis(pyrazolyl) pyridine (BPP) tricarbonyl rhenium(I) complex

 http://pubs.rsc.org/en/content/articlelanding/2010/dt/c0dt00357c#!divAbstract

Dalton Trans., 2010,39, 7692-7699

DOI: 10.1039/C0DT00357C

A bromo tricarbonyl rhenium(I) complex with a thiophene-functionalized bis(pyrazolyl) pyridineligand (L), ReBr(L)(CO)₃ (1), has been synthesized and characterized by variable temperature and COSY 2-D ¹H 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 ³MLCT excited state with an additional contribution from aLC ³(π→π*) transition. The single-crystal X-ray diffraction structure of the title ligand is also reported.