Redox-active ferrocenyl dendrimers and polymers in solution and immobilised on electrode surfaces

Casado, Carmen M.; Cuadrado, Isabel; Morán, Moisés; Alonso, Beatriz; García, Borja Sánchez; González, Blanca; Losada, José

doi:10.1016/s0010-8545(98)00252-5

Cited by 222 publications

(110 citation statements)

References 48 publications

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“…[44][45][46][47][48][49] They have various structural types such as linearly-linked ferrocenyl wires, 50) star-shaped dendritic polyferrocenes, [51][52][53][54] and ring-shaped (cyclic) polyferrocenes. 55) Theoretical treatment of the stepwise oxidation processes of these polyferrocene oligomers, depending on the structural type, has been developed by Aoki and the co-workers, [56][57][58][59][60] and the theory has been successfully applied to the experimental systems.…”

Section: Polyferrocenyl Compounds With Extendedmentioning

confidence: 99%

Mixed-Valency and Metal-Metal Coupling in Polynuclear Metal Complexes: Recent Progress and Prospects

Abe

2011

Bull. Jpn. Soc. Coord. Chem.

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value is frequently taken as a measure for the extent of twosite interactions on molecules of interest (Eq. 1). Recent progress in the redox chemistry of multimetallic transition-metal complexes and clusters is reviewed. Special attention is paid to high-nuclearity complexes wherein redox-active sites (e.g., ferrocenyl pendants or Ru centers) are assembled in a close proximity with a well-defined geometry via the covalent or coordination bonds. A special emphasis is placed on literature survey for paddlewheel diruthenium(II,III) complexes coordinated by axial or equatorial ferrocenyl ligands, polyferrocenyl compounds in the form of wire, star, and ring, ferrocenyl-based dendrimers, and ligand-mediated molecular triangles and squares. Finally, future prospects of these mixed-valent systems are briefly discussed.

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Section: Polyferrocenyl Compounds With Extendedmentioning

confidence: 99%

Mixed-Valency and Metal-Metal Coupling in Polynuclear Metal Complexes: Recent Progress and Prospects

Abe

2011

Bull. Jpn. Soc. Coord. Chem.

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“…Astruc et al examined their ability to serve as recognition elements for a variety of ions, including H 2 PO 4 -, ATP 2-, and HSO 4 - (56). The electrochemical and spectroscopic properties of metallodendrimers have been exploited to develop amperometric biosensors and DNA immunoassays (57)(58)(59). In addition, because both the photophysics and the redox behavior of the pendant chromophores or electrophores are sensitive to their environment, applications as sensors for a variety of species have been considered, such as the luminescence quenching by aromatic nitro groups mentioned earlier (37).…”

Section: Applicationsmentioning

confidence: 99%

Peer Reviewed: Redox and Photoactive Dendrimers in Solution and on Surfaces

Abruña¹

2004

Anal. Chem.

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Because of the broad range of potential applications, interest in the preparation and characterization of redox and photoactive supramolecular structures, particularly dendrimers, is widespread. These applications include sensors, electrochromic and electroluminescent display devices, light harvesting, redox mediators, molecular electronics, and MRI materials. Dendrimers are highly branched globular molecules that consist of a core, selfreplicating branching units, and peripheral surface groups ( Figure 1); given their relatively high molecular weight, they can be considered "monodisperse polymers" (1-4). Dendrimers can be functionalized with reactive groups at the core, at the periphery, or throughout the entire structure and are ideal platforms for modification with redox and photoactive groups (5-8). We have synthesized and characterized dendrimers that are decorated on the periphery with redox and photoactive centers based on transition metal complexes and explored their electro-and photochemical properties in solution and on surfaces.

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“…Redox-stable metallodendrimers are a specific class of materials allowing redox anion recognition, sensing [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and biosensing 14,15 that have been used essentially with ferrocene derivatives [12][13][14][15] . Although biferrocene-and silicon-bridged biferrocene-terminated dendrimers are known 5,[14][15][16] , no dendrimers have yet been isolated in several oxidation states owing to instability of the oddelectron species. The flexibility of oxidation-state variation with the maintenance of stability for a large collection of metal centres located at the metallodendrimer periphery is highly desirable, however, because it would allow the design of nanodevices towards applications in molecular nanoelectronics including nanobatteries 17 and polyelectrolytes 18 .…”

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confidence: 99%

Metallodendrimers in three oxidation states with electronically interacting metals and stabilization of size-selected gold nanoparticles

et al. 2014

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Metallodendrimers containing redox-robust centres may have applications in molecular redox recognition, sensing, biosensing and catalysis. So far, however, no metallodendrimer is known in several oxidation states. Here we report metallodendrimers with two electronically communicating iron centres that are stable and isolated in both the Fe II and Fe III oxidation states, and in addition as class-II mixed-valent Fe II Fe III complexes. These dendrons are branched to arene-centred dendrimer cores either by Sonogashira coupling or 'click' reactions. The latter reaction involves the introduction of intradendritic 1,2,3-triazolyl ligands, which allows investigation of the selective role of these ligands in intradendritic Au III coordination and Au 0 nanoparticle stabilization. As a result, and using the various metallodendrimers with different oxidation states, small Au 0 nanoparticles are intradendritically stabilized by the triazole ligands, whereas with the related non-'click' dendrimers large Au 0 nanoparticles are formed outside the dendrimers and stabilized by a group of dendrimers.

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Redox-active ferrocenyl dendrimers and polymers in solution and immobilised on electrode surfaces

Cited by 222 publications

References 48 publications

Mixed-Valency and Metal-Metal Coupling in Polynuclear Metal Complexes: Recent Progress and Prospects

Mixed-Valency and Metal-Metal Coupling in Polynuclear Metal Complexes: Recent Progress and Prospects

Peer Reviewed: Redox and Photoactive Dendrimers in Solution and on Surfaces

Metallodendrimers in three oxidation states with electronically interacting metals and stabilization of size-selected gold nanoparticles

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