Interfragment transmission of electronic effects of π-acceptor ligands in heterometallic triad complexes with trans-[Ru(Py)4(CN)2] as a central unit

Electronic Energy Transduction from {Ru(py)4} Chromophores to Cr(III) Luminophores

“…For example, pyridinic ligands with a variety of substituents at the 4-position are employable toward tuning the electronic structure. − Equally versatile are their solvento complexes as precursors as a means to realize unsymmetrically trans disubstituted {Ru­(py) 4 }. − A stable trans configuration assists in overcoming the steric constraints typically encountered in cis -{Ru­(bpy) 2 }, especially when larger bridged systems or densely covered surfaces are at stake . Diverse molecular architectures were built around these building blocks, ,− and cyanide-bridged molecular wires stand as notable examples. , Such a cyanide-based motif enables strong electronic coupling between the metal centers without detrimental traps or low-energy states that impede any efficient energy or charge migration. − …”