Surface modification of carbon and metal electrodes with bistable molecular redox switches by click and amide coupling
2015 (English)In: Journal of Materials Chemistry C, ISSN 2050-7526, Vol. 3, no 38, 10023-10030 p.Article in journal (Refereed) Published
Ruthenium complexes [Ru(R-Ph-tpy)(bpyMeOHpy)] (Ph-tpy = 4'-(4-R-phenyl)-2,2':6',2 ''-terpyridine, R = NH2, COOH, CRCH, bpyMeOHpy = 1-[6-(2,2'-bipyridyl)]-1-(2-pyridyl)-ethanol) were covalently attached to carbon and metal electrodes by amide and click coupling reactions. Coupling agents were covalently grafted onto the electrodes by electrochemical reduction of p-functionalized diazonium tethers X-Ph-N-2(+) (X = COOH, NO2, N-3) followed by electrochemical reduction of the nitro tether. The modification of the electrode surfaces with the Ru complexes results in a hysteretic current-voltage response based on the redox-induced N-6/N5O linkage isomerism of the ambidentate pyridyl/alkoxy unit in the bpyMeOHpy chelate ligand. The immobilized complexes can be exhaustively addressed electrochemically with scan rates <= 10000 V s(-1) and can switch uniformly with kinetic and thermodynamic parameters similar to the properties of reference complexes in homogeneous solution.
Place, publisher, year, edition, pages
2015. Vol. 3, no 38, 10023-10030 p.
IdentifiersURN: urn:nbn:se:uu:diva-265647DOI: 10.1039/c5tc01655jISI: 000361835600032OAI: oai:DiVA.org:uu-265647DiVA: diva2:866410
FunderCarl Tryggers foundation Knut and Alice Wallenberg Foundation