Coordination-mode pH-activated Molecular Switches based on Ruthenium(II) Oligopyridine Complex Architecture

Steen, Robert O., 1978- (författare): Mälardalens högskola,Akademin för hållbar samhälls- och teknikutveckling

Nurkkala, Lasse J., 1976- (författare): Mälardalens högskola,Akademin för hållbar samhälls- och teknikutveckling

Bernhardt, Paul V. (författare): University of Queensland, Dept. of Chemistry, School of Molecular & Microbial Sciences

Dunne, Simon J., 1964- (författare)

(creator_code:org_t)

Abstract Ämnesord

Stäng

A number of [Ru(tpy)L] complexes (where L is a ligand based on the 6-thien-2-yl-2,2’-bipyridine motif) have been generated to study the ability of this terdentate motif to switch between a N,N,C and a N,N,S binding mode as a function of pH and irradiation. Whilst the parent system 6-thien-2-yl-2,2’-bipyridine (1) displayed facile switching between the orange and purple forms, heavier analogues displayed sluggish switching – most likely resulting from a large moment of inertia about the bond between the S/C-bonded thiophene ring and the chelating bipyridine unit. Prototypic unsymmetrical bimetallic complexes (C7S and C7C) have been generated in order to test if the binding mode of the switching unit can affect the oxidation potential of the remote [Ru(bpy)2(L)] unit. The results of cyclic voltammetry studies suggest that only weak electronic coupling between the metal cores exists, and that the coordination mode (N,N,C or N,N,S) of the thiophene moiety only has a small effect on the oxidation potential of the [Ru(bpy)2(L)] unit.

Av författaren/redakt...: Steen, Robert O. ...; Nurkkala, Lasse ...; Hougen, Annett I ...; Schmitt, Chantal ...; Constable, Edwin ...; Rees, David G. F ...; visa fler...; Bernhardt, Paul ...; Dunne, Simon J., ...; visa färre...

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