We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The 1,6,7,12-Tetraazaperylene Bridging Ligand as an Electron Reservoir and Its Disulfonato Derivative as Redox Mediator in an Enzyme-Electrode Process.
- Authors
Brietzke, Thomas; Dietz, Thomas; Kelling, Alexandra; Schilde, Uwe; Bois, Julianae; Kelm, Harald; Reh, Manuel; Schmitz, Markus; Körzdörfer, Thomas; Leimkühler, Silke; Wollenberger, Ulla; Krüger, Hans‐Jörg; Holdt, Hans‐Jürgen
- Abstract
The homodinuclear ruthenium(II) complex [{Ru( l-N4Me2)}2(μ-tape)](PF6)4 {[ 1](PF6)4} ( l-N4Me2= N, N′-dimethyl-2,11-diaza[3.3](2,6)-pyridinophane, tape=1,6,7,12-tetraazaperylene) can store one or two electrons in the energetically low-lying π* orbital of the bridging ligand tape. The corresponding singly and doubly reduced complexes [{Ru( l-N4Me2)}2(μ-tape.−)](PF6)3 {[ 2](PF6)3} and [{Ru( l-N4Me2)}2(μ-tape2−)](PF6)2 {[ 3](PF6)2}, respectively, were electrochemically generated, successfully isolated and fully characterized by single-crystal X-ray crystallography, spectroscopic methods and magnetic susceptibility measurements. The singly reduced complex [ 2](PF6)3 contains the π-radical tape.− and the doubly reduced [ 3](PF6)2 the diamagnetic dianion tape2− as bridging ligand, respectively. Nucleophilic aromatic substitution at the bridging tape in [ 1]4+ by two sulfite units gave the complex [{Ru( l-N4Me2)}2{μ-tape-(SO3)2}]2+ ([ 4]2+). Complex dication [ 4]2+ was exploited as a redox mediator between an anaerobic homogenous reaction solution of an enzyme system (sulfite/sulfite oxidase) and the electrode via participation of the low-energy π*-orbital of the disulfonato-substituted bridging ligand tape-(SO3)22− ( Ered1=−0.1 V versus Ag/AgCl/1 m KCl in water).
- Subjects
RUTHENIUM compounds; COMPLEX compounds; BRIDGING ligands; ELECTRODES; CHEMICAL derivatives
- Publication
Chemistry - A European Journal, 2017, Vol 23, Issue 62, p15583
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201703639