Synthesis and characterization of 2,6-di(quinolin-8-yl)pyridines. New ligands for bistridentate Ru(II) complexes with microsecond luminescent lifetimes.
The synthesis of 4-substituted and 4-aryl-substituted 2,6-di(quinolin-8-yl)pyridines is described. The tridentate ligands were prepared via a palladium-catalyzed Suzuki-Miyaura cross-coupling reaction or via a one-step ring-forming reaction generating the central pyridine ring. X-ray crystal structures and 1H NMR shifts are discussed and compared to the corresponding data for a RuII bistridentate complex. Intramolecular stacking of two quinoline units in the RuII complex is suggested by 1H NMR data and also observed in the X-ray structure.
Jäger
Michael
M
Department of Photochemistry and Molecular Science, Uppsala University, Box 523, 75120 Uppsala, Sweden.
Eriksson
Lars
L
Bergquist
Jonas
J
Johansson
Olof
O
D002384:Catalysis; D018360:Crystallography, X-Ray; D008024:Ligands; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D011725:Pyridines / Q000138:chemical synthesis* / Q000737:chemistry; D011804:Quinolines / Q000138:chemical synthesis* / Q000737:chemistry; D012015:Reference Standards; D012428:Ruthenium / Q000737:chemistry*; D013997:Time Factors
D008024:Ligands; D049408:Luminescent Agents; D009942:Organometallic Compounds; D011725:Pyridines; D011804:Quinolines; D010165:Palladium; D012428:Ruthenium