Moll, Johannnes published the artcileGreen-Light Activation of Push-Pull Ruthenium(II) Complexes, Recommanded Product: Picolinonitrile, the main research area is microwave irradiation preparation ruthenium carboxypyridylmethylaminepyridylpyridine dimethyldipyridinylpyridinediamine complex; crystal mol structure ruthenium carboxypyridylmethylaminepyridylpyridine dimethyldipyridinylpyridinediamine complex; luminescence ruthenium carboxypyridylmethylaminepyridylpyridine dimethyldipyridinylpyridinediamine complex; cyclic voltammetry ruthenium carboxypyridylmethylaminepyridylpyridine dimethyldipyridinylpyridinediamine complex; luminescence; photocatalysis; photochemistry; photophysics; ruthenium.
Synthesis, characterization, electrochem., and photophysics of homo- and heteroleptic ruthenium(II) complexes [Ru(cpmp)2]2+ (22+) and [Ru(cpmp)(ddpd)]2+ (32+) bearing the tridentate ligands 6,2”-carboxypyridyl-2,2′-methylamine-pyridyl-pyridine (cpmp) and N,N’-dimethyl-N,N’-dipyridin-2-ylpyridine-2,6-diamine (ddpd) are reported. The complexes possess one (32+) or two (22+) electron-deficient dipyridyl ketone fragments as electron-accepting sites enabling intraligand charge transfer (ILCT), ligand-to-ligand charge transfer (LL’CT) and low-energy metal-to-ligand charge transfer (MLCT) absorptions. The latter peak around 544 nm (green light). Complex 22+ shows 3MLCT phosphorescence in the red to near-IR spectral region at room temperature in deaerated acetonitrile solution with an emission quantum yield of 1.3% and a 3MLCT lifetime of 477 ns, whereas 32+ is much less luminescent. This different behavior is ascribed to the energy gap law and the shape of the parasitic excited 3MC state potential energy surface. This study highlights the importance of the excited-state energies and geometries for the actual excited-state dynamics. Aromatic and aliphatic amines reductively quench the excited state of 22+ paving the way to photocatalytic applications using low-energy green light as exemplified with the green-light-sensitized thiol-ene click reaction.
Chemistry – A European Journal published new progress about Charge transfer transition (ligand-to-ligand, metal-to-ligand). 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Recommanded Product: Picolinonitrile.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts