Synthesis and properties of trinuclear polypyridyl complexes Ru(II)–Co(II)–Ru(II) and Ru(II)–Co(III)–Ru(II): Their photoinduced interconversion

Synthesis and characterization of a new ditopic bipyridine-terpyridine bridging ligand using a Suzuki cross-coupling reaction

“…Although there are many reports on the synthesis of polypyridyl bridging ligands in the literature, [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] but polypyridyl bridging ligands with two binding sites where the number of donor atoms are different have been less studied. 3,4,[21][22][23] In our series of researches development of bridging ligands with bipyridine types at one end and terpyridine types of binding sites at the other end appealed.…”

Visible‐Light‐Driven Generation of High‐Valent Oxo‐Bridged Dinuclear and Tetranuclear Manganese Terpyridine Entities Linked to Photoactive Ruthenium Units of Relevance to Photosystem II

“…The cyclic voltammogram (CV) of Mn II Ru 2 II corresponds to the superposition of the electroactivity of the [Ru(bpy) 2 (bpy–terpy)] 2+ and [Mn( p Tol‐terpy) 2 ] 2+ subunits77,78,80 in their respective ratio (2:1, Ru II /Mn II ). This confirms the successful synthesis and excellent stability of the complex in CH 3 CN (Figures 1 and Supporting Information, Figure S5).…”

“…These systems are readily assigned to the joint oxidation of the Mn and Ru subunits (Mn III/II and Ru III/II ) for the first process [Equations (1) and (2)] and to the second one‐electron oxidation of the Mn subunit (Mn IV/III ) for the second process [Equation (3)]. The two oxidation processes at E 1/2 = 0.92 V cannot be distinguished because the reversible oxidation potentials of the parent complexes [Mn( p Tol‐terpy) 2 ] 2+ ( E 1/2 = 0.91 V)80 and [Ru(bpy) 2 (bpy–terpy)] 2+ ( E 1/2 = 0.93 V)77,78 are too close (Δ E 1/2 = 20 mV). …”

“…In this paper, we report fully on this complex from synthesis to characterisation, and we also describe its redox, photophysical and photochemical properties. The bridging nonconjugated bpy–terpy ligand76 used to covalently link the [Mn II (terpy) 2 ] 2+ ‐like unit with the two [Ru II (bpy) 3 ] 2+ units,77,78 prevents the alteration of the individual redox properties at each site.…”

Synthesis, Specrtoscopic, Electrochemical and Antibacterial Activities of Mono- and Homobi-nuclear of Ru(II) Complexes with a Triazolate Bridging Ligand

“…The general approach, utilized in electron transfer studies has been to bind the electron acceptor/donor to the ruthenium polypyridyl center via the polypyridyl Ligands [15][16][17][18] . In the present study, we describe the synthesis and spectroscopic (UV, IR, 1 HNMR) studies of new mono-and homobi-nuclear Ru (II) complexes containing triazolate bridge ligands.…”