Immobilization of Redox-Active Ligands on an Electrode: The Dendrimer Route

F, Le Derf; Levillain, Eric; Trippé, Gaëlle; Gorgues, Alexis; Salle, Muriel; Rm, Sebastían; Am, Caminade; Jp, Majoral

doi:10.1002/1521-3773(20010105)40:1<224::aid-anie224>3.3.co;2-f

Cited by 3 publications

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“…Phosphorus containing dendrimers benefit from the global interest in dendrimers, but they have also their own specificities and properties [10]. Recently, a synthesis has been developed and the properties of phosphorus containing dendrimers has been investigated [11] by several strategies of functionalization of the surface [12] or the branches [13] of dendritic compounds. Similarly, phosphorus-containing dendrons [14] are also becoming of interest.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectral characterization, electron microscopic study and thermogravimetric analysis of a phosphorus containing dendrimer with diphenylsilanediol as core unit

Dadapeer

Babu²,

Reddy³

et al. 2010

Beilstein J. Org. Chem.

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SummaryA phosphorus containing dendrimer with a diphenylsilanediol core was synthesized using a divergent method. Several types of reactions were performed on dendrons of several sizes, either at the level of the core or the surface. The giant Schiff’s base macro molecule possesses 12 imine bonds and 8 hydroxy groups on the terminal phenyl groups. The structures of the intermediate compounds were confirmed by IR, GCMS and 31P NMR. The final compound was characterized by 1H, 13C, 31P NMR, MALDI-TOF MS and CHN analysis. Scanning electron microscopic and thermogravimetric analysis/differential scanning calorimetric studies were also performed on the final dendritic molecule.

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Section: Introductionmentioning

confidence: 99%

Synthesis, spectral characterization, electron microscopic study and thermogravimetric analysis of a phosphorus containing dendrimer with diphenylsilanediol as core unit

Dadapeer

Babu²,

Reddy³

et al. 2010

Beilstein J. Org. Chem.

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Dendrimer Complexes Based on Fine-Controlled Metal Assembling

Yamamoto¹,

Imaoka²

2006

Bulletin of the Chemical Society of Japan

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A series of novel dendrimers composed of dendritic phenylazomethines (DPAs) were synthesized with several types of functional cores. The metal assembling to the DPAs is stepwise by the layers, therefore, they can be used as a scaffold for the precise hybridization between metal ions and organic macromolecules. Because of uniform structure of the dendrimer, there is no structural dispersion in the macromolecule-metal hybrid of the DPAs. Also, the number of metal ions loaded in one dendrimer should have no statistical distribution in principle due to the precise metal assembling. A rigid -conjugating backbone structure contributes not only to the stepwise metal assembly, but also to the solid-state stability under high temperature. Development of this property without any reduction in solubility in organic media enabled the easy preparation of homogeneous amorphous films in which the metal and macromolecule are precisely hybridized. As a result, the thin solid of the metal-assembling dendrimer acts as an excellent organic semiconductor in the hole-transport layer of a light-emitting diode. Metal-assembling DPAs also enhance the electron-transfer reaction as a protein-like catalyst. The DPA having a cobalt porphyrin core-could catalyze the CO 2 reduction at an applied overpotential 1.1 V lower than that needed for the catalysis by a model compound of the porphyrin core (CoTPP). Reversible encapsulation/release of multiple irons is also demonstrated as a mimic of the iron storage protein (Ferritin). The switching between these two coordinating states can be completely controlled by the redox states of the iron (Fe II / Fe III ). The finding of these unique dendritic ligands will afford new insight into molecular design for finely controlled macromolecule-metal hybrid materials. Metallo-Dendrimer ComplexesMacromolecule-metal complexes 1 are defined as molecularlevel hybrids built up with metal complexes and organic polymers. They have been noted in evolution of novel functions based on synergetic effect between the functionality of each part (metal and polymer). For example, applications of these materials for fixation of catalysts, 2 functional modified electrodes based on electron [3][4][5] /ion 6 conductivity, electron-spin control, 7 and amplification of photoelectron conjugating properties 8 demonstrate outstanding enhancement. Most of them are induced by (1) supporter effect, (2) concentration/dilution effect, (3) environmental effect, (4) conformational effect, and (5) cooperative/concerted effect by micro domains in the polymers. For maximum use of these domains, a general methodology that can handle the higher-order structure of the hybrids is strongly required. All the molecular, hybrid, and higher-order structures of the conventional macromolecule-metal complexes are however dispersed with statistical distribution, and impossible to fix themselves into one limited form. Now many research interest moved to the next stage focusing on the control of higher-order structures using self-assembling approach based...

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