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Two Ruthenium Complexes Capable of Storing Multiple Electrons on a Single Ligand - Photophysical, Photochemical and Electrochemical properties of [Ru(phen)2(TAPHAT)]2+ and [Ru(phen)2(TAPHAT)Ru(phen)2]4+.

Abstract

The photophysical, photochemical and electrochemical properties of two newly synthesized ruthenium complexes, [Ru(phen)2(TAPHAT)]2+ and [Ru(phen)2(TAPHAT)Ru(phen)2]4+ is reported. We have developed a novel synthetic methodology that involves the metal-free oxidative coupling of diamino compound to form a desired “pyrazine-type” core. This methodology is employed both on the free diamino ligand as well as on the different ruthenium complexes, illustrating therefore the applicability of this reaction. The TAPHAT ligand, that possesses 7 aromatic rings, 10 nitrogen atoms for 20 carbon atoms gives rise to ruthenium complexes that can undergo up to three consecutive reduction centered on said ligand, a critical parameter for electron storage applications. Temperature dependent study have confirmed the presence of a 4th MLCT state. Excited-state quenching in the presence of guanine or hydroquinone allows to foresee biomedical applications.

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Publication details

The article was received on 31 Aug 2017, accepted on 28 Sep 2017 and first published on 29 Sep 2017


Article type: Paper
DOI: 10.1039/C7DT03232C
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Two Ruthenium Complexes Capable of Storing Multiple Electrons on a Single Ligand - Photophysical, Photochemical and Electrochemical properties of [Ru(phen)2(TAPHAT)]2+ and [Ru(phen)2(TAPHAT)Ru(phen)2]4+.

    L. Troian-Gautier, L. Marcélis, J. De Winter, P. Gerbaux and C. Moucheron, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT03232C

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