217-82-3Relevant articles and documents
Intervalence charge transfer in a "chain-like" ruthenium trinuclear assembly based on the bridging ligand 4,7-phenanthrolino-5,6: 5′,6′-pyrazine (ppz)
D'Alessandro, Deanna M.,Keene, F. Richard
, p. 1060 - 1072 (2006)
The IVCT characteristics of the mixed valence forms of the trinuclear complex [{Δ-Ru(bpy)2}2{Δt-Ru(bpy)(- ppz)2}]n+ (n = 7, 8; t = trans), and the diastereoisomers (meso and rac) of the dinuclear complex [{Ru(bpy)2} 2(-ppz)]5+, display a marked dependence on the nuclearity and extent of oxidation of the assemblies. The dinuclear species are classified as borderline localised-delocalised mixed valence species while the two mixed valence states of the trinuclear complex exhibit localised behaviour. One-electron oxidation of a terminal Ru centre in the trinuclear case gives rise to a broad, low intensity IVCT band for the +7 mixed valence species which is composed of two underlying Gaussian-shaped bands. The transitions are identified as adjacent and remote IVCT transitions, with the former dominating the intensity of the IVCT manifold. The +8 mixed valence species exhibits a single dominant IVCT band arising from the equivalent IVCT transitions from the central Ruii to peripheral Ruiii centres. The Royal Society of Chemistry 2006.
An improved preparation of 4,7-phenanthrolino-5,6:5′,6′-pyrazine
Imor, Susan,Morgan, Robert J.,Wang, Sihe,Morgan, Oma,Baker
, p. 2197 - 2203 (1996)
An overall three step preparation of the bis-diimine bridging ligand 4,7-phenanthrolino-5,6:5′,6′-pyrazine (ppz, 1) from 2-methoxy-l,4-phenylenediamine hydrosulfate 4 is reported.
