Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), Application In Synthesis of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II).
Intramolecular electronic energy transfer in ruthenium(II) diimine donor/pyrene acceptor complexes linked by a single C-C bond
The photophysical behavior of [(bpy)2Ru(L)]2+ complexes L = 4-(1′-pyrenyl)-2,2′-bipyridine, bpy-pyr; 2-(1′–pyrenyl)-1,10-phenanthroline, phen-pyr; and 2-(2′-naphthyl)-1,10-phenanthroline, phen-nap) was investigated in solutions and frozen matrices. The conformation of the linked pyrene differs in the two complexes: The pyrene moiety is conformationally constrained to be nearly perpendicular to the phenanthroline in the phen-pyr complex while the pyrene in the bpy-pyr complex has much greater flexibility about the C-C bond linking the ligand and the pyrene. The 3MLCT excited state of the Ru(II) diimine complex and the 3 (pi?pi*) state of the pyrenyl substituent are nearly isoenergetic; the 3MLCT state is the lowest energy state in the bpy-pyr complex, and the pyrene 3(pi?pi*) state is lower in energy for the phen-pyr complex. The bpy-pyr complex is unique in that the3MLCT state has a very long lived luminescence (approximately 50 mus in degassed CH3CN). Luminescence decays for both pyrene containing complexes can be fit as double exponentials, indicating that the 3MLCT and 3(pi?pi*) states are not in equilibrium. Analysis of decays obtained at several temperatures reveal that energy transfer is slower than relaxation of the 3MLCT state but more rapid than decay of the pyrene localized3(pi?pi*) state. The results also suggest that electronic coupling between the two states is weak despite the fact that the two chromophores are separated by a single covalent bond.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Application In Synthesis of Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II). In my other articles, you can also check out more blogs about 15746-57-3
Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI