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- Title
Three Bis‐BODIPY Analogous Diruthenium Redox Series: Characterization and Electronic Structure Analysis.
- Authors
Bera, Sudip Kumar; Mondal, Sudipta; Hazari, Arijit Singha; Priego, José Luis; Jiménez‐Aparicio, Reyes; Kaim, Wolfgang; Lahiri, Goutam Kumar
- Abstract
The dianion derived from (2Z,6Z)‐3,7‐diphenyl‐N2,N6‐di(pyridin‐2‐yl)pyrrolo[2,3‐f]indole‐2,6(1H,5H)‐diimine (H2BL), a modified BODIPY ligand precursor, is shown to be capable of bridging two metal complex fragments RuL2, L=2,4‐pentanedionato (acac−), 2,2'‐bipyridine (bpy) or 2‐phenylazopyridine (pap) in [Ru(acac)2Ru(μ‐BL)Ru(acac)2] (1/2), [Ru(bpy)2Ru(μ‐BL)Ru(bpy)2](ClO4)2 ([3](ClO4)2) and [Ru(pap)2Ru(μ‐BL)Ru(pap)2](ClO4)2 ([4](ClO4)2). The compounds, including a diastereoisomeric pair 1 (meso) and 2 (rac) were spectroscopically and structurally characterized. Reversible electron transfers as revealed by cyclic and differential pulse voltammetry allowed for an EPR and UV‐vis‐NIR spectroelectrochemical investigation of several neighboring charge states. Together with susceptibility measurements and TD‐DFT calculations the assignment of oxidation states reveals that 1, 2 are diruthenium(III) species which can be oxidized or reduced by one electron whereas 32+ and 42+ contain ruthenium(II) and get reduced or oxidized mainly at the dianionic bridge (32+) or are reduced at the ancillary ligands pap (42+).
- Subjects
ELECTRONIC structure; OXIDATION-reduction reaction; CHARGE exchange; OXIDATION states; RUTHENIUM; CYCLIC voltammetry
- Publication
Chemistry - An Asian Journal, 2020, Vol 15, Issue 16, p2532
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.202000326