2016
DOI: 10.1021/acsami.6b05082
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Photoinduced Charge Separation within Metallo-supramolecular Wires Built around a [Ru(bpy)3]2+–Bisterpyridine Linear Entity

Abstract: A [Ru(bpy)3](2+)-like complex (L1) bearing two free terpyridine groups at the 5 and 5' positions of the same bipyridine, linked by the rigid and linear 2,5-dimethyl phenylene bridges has been synthesized to open access to two classes of linear molecular wires with photosensitive properties: a bimetallic coordination polymer and an inorganic triad. In this Research Article, we report on the synthesis and characterization of the resulting [{Ru(II_)Fe(II)}n](4n+) alternated bimetallic polymer and the [Co(III_)Ru(… Show more

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Cited by 21 publications
(15 citation statements)
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“…26 Among others, terpyridine (tpy)-based ligands have been shown to form stable complexes with a wide range of metal ions in different oxidation states. 7,14,15,27 Since the seminal works by Constable, 28,29 the synthetic methodology of tpy derivatives has been significantly improved. 30−32 In contrast to bpy-based asymmetric ligands that often form a mixture of facial and meridional isomers, tpy-containing ligands are structurally more appealing, because they form well-defined six-coordinate cationic Fe(II), 33 Co(II), 34 Ru(II), 35 and Os(II) 36 complexes where two ligating moieties are situated in an orthogonal fashion.…”
Section: Introductionmentioning
confidence: 99%
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“…26 Among others, terpyridine (tpy)-based ligands have been shown to form stable complexes with a wide range of metal ions in different oxidation states. 7,14,15,27 Since the seminal works by Constable, 28,29 the synthetic methodology of tpy derivatives has been significantly improved. 30−32 In contrast to bpy-based asymmetric ligands that often form a mixture of facial and meridional isomers, tpy-containing ligands are structurally more appealing, because they form well-defined six-coordinate cationic Fe(II), 33 Co(II), 34 Ru(II), 35 and Os(II) 36 complexes where two ligating moieties are situated in an orthogonal fashion.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, by adjusting the ligand electronics, both electric and optic responses of the metal complex can be fine-tuned . Incorporating a [Ru­(bpy) 3 ] 2+ motif to modify indium–tin oxide (ITO) with a Co­(III)/Ru­(II)/Fe­(II) triad and irradiating the assembly at a bias of 0.12 V (to maintain a Co­(III) state, thus making it a good electron acceptor toward the excited state of [Ru­(bpy) 3 ] 2+ *), Chauvin observed the generation of an anodic photocurrent in the presence of a tertiary amine as a sacrificial electron donor . The back electron transfer within the ITO/[Co­(II)–Ru­(III)–Fe­(II)] 7+ assemblies is short-circuited either by a fast electron injection from the Co­(II) center to the ITO electrode at 0.12 V and/or by an efficient electron transfer process from the Fe­(II) subunits to the Ru­(III) center (Δ G = −200 mV).…”
Section: Introductionmentioning
confidence: 99%
“…The synthesis of heterobimetallic supramolecular polymers is generally achieved by two strategies. One strategy is the introduction of two heterometal ions into the polymer chain in different coordination environments, which is achieved through different binding affinity of the ligand for different metal ions [16]. Another strategy is the introduction of heterometal ions into the MSP chain in identical coordination environments, which is synthetically challenging [14].…”
Section: Introductionmentioning
confidence: 99%
“…Subsequently, transition-metal ions and bridging ligands are alternately provided to enable wire growth. Among different bridging ligands, ligands with one or more 2,2′:6′,2″-terpyridine (TP) motives have proven particularly popular since they form reliable metallo-supramolecular wires. TPs are easily accessed synthetically and have rich coordination chemistry. , High binding constants to different transition metals make them especially useful for the incorporation of multiple metal centers into molecular wires. Using TP derivatives as bridging ligands, the last step of the metallo-supramolecular wire assembly between two nanoelectrodes is often the formation of the electrical contact between one TP group and the counter electrode.…”
Section: Introductionmentioning
confidence: 99%