Synthesis and Photochemical Properties of Covalently-Linked Dimers of Ruthenium(II) Tris (Bipyridine) Complex: Comparison with Ru(II)(bpy)₂(Poly-4-Methyl-4′-Vinylbipyridine)

Photoinduced energy and electron transfer processes in heteropolynuclear polypyridyl complexes of Ru(ii) and Fe(ii)

“…This reflects that no free ligand is present in the medium and that iron and ruthenium, lead to close shift of the both CH 2 and CH 3 moieties. Moreover, the ESI-MS spectra of [Ru II (Ln)Fe II ] 4+ exhibit only main peaks corresponding to the different cationic forms of each complexes associated with the loss of one to four PF 6 À anions (see experimental section). The absence of by-products is also confirmed by luminescence measurements since, for all complexes, the emission decay curves are clean single exponentials.…”

“…Most complexes contain bridged two identical diimine liganding sites (2,2 0 -bipyridine (bpy) derivatives for instance) in which a [Ru(bpy) 3 ] 2+ chromophore moiety is connected to another metallic bipyridine complex acting as another chromophore or an electron acceptor or donor. [4][5][6][7][8][9][10][11][12][13][14][15][16] Among these systems, those based on Ru-Mn bimetallic complexes have attracted a special interest since few years with the aim to model the donor-side of the photosystem II (PSII). [17][18][19][20] A series of binuclear Mn-Ru complexes, in which the [Ru(bpy) 3 ] 2+ moiety played the role of the photoactive P 680 chlorophylls, has been synthesized and studied.…”

Electrochemical Olefin Epoxidation Employing an Iron(IV)Porphyrin/Trisbipyridineruthenium(III) Polymer Catalyst

“…The only significant difference is that Ib can be electrochemically polymerized (see the Supporting Information). The porphyrin core, which is identical for Ia and Ib was synthesized via standard condensation procedures employing pyrrole and 4-formyl-4‘-methyl-2,2‘-bipyridine. , The Ru(L) 2 moieties (L = 4,4‘-dimethylbipyridine for Ia and 4-vinyl-4‘-methyl-2,2‘-bipyridine for Ib ) were attached via reaction of excess (10 equiv.) [Ru(L) 2 (Cl) 2 ] with the porphyrin.…”