Metallodendrimers and dendronized gold colloids as nanocatalysts, nanosensors and nanomaterials for molecular electronics

Astruc, Didier; Blais, Jean‐Claude; Daniel, Marie‐Christine; Gatard, Sylvain; Nlate, Sylvain; Ruiz, Jaimé

doi:10.1016/j.crci.2003.06.004

Cited by 35 publications

(16 citation statements)

References 65 publications

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“…Alternatively, convergent synthesis of nonaferrocenyl phenol dendrons was carried out before functionalization with the alkylthiol tether and binding to the AuNP. [155][156][157][158] Likewise, triferrocenyl-and nonaferrocenyl-phenolate dendrons were coordinated to Mo 6 clusters upon substitution of the six terminal chloro cluster ligands by the phenolates, yielding Mo 6 -cluster-centered silylferrocenyl-terminated dendrimers. [159][160][161][162] Ferrocenyl dendronized polymers could be synthesized by AIBNinduced radical polymerization of a styrene monomer containing either a triferrocenyl-phenolate dendron or a tri(chloromethyl)-phenolate dendron that has been introduced by Williamson reaction with the iodomethyl para substituent of the styrene monomer.…”

Section: Functionalizations Of the Dendrimers For Applicationsmentioning

confidence: 99%

Organoiron-mediated dendrimer syntheses with 1→3 connectivity and applications

Astruc

Ruiz

2010

Tetrahedron

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Section: Functionalizations Of the Dendrimers For Applicationsmentioning

confidence: 99%

Organoiron-mediated dendrimer syntheses with 1→3 connectivity and applications

Astruc

Ruiz

2010

Tetrahedron

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“…Innovative synthetic procedures have increased accessibility to the functionalization of dendrimers with transition metals in the core, finding interesting applications in catalysis [127][128][129][130]. Several authors have proposed the use of dendrimers to develop complexes with metals, including Pt [131], Ag [132,133], Fe [134], Cu and Ni [135].…”

Section: Application(s)mentioning

confidence: 99%

Dendrimers and derivatives as a potential therapeutic tool in regenerative medicine strategies—A review

Oliveira

Salgado

Sousa

et al. 2010

Progress in Polymer Science

177

100

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a b s t r a c tSince the pioneering work dealing with the synthesis and physicochemical aspects of dendrimers, a predictable and tunable set of compositions for therapeutic, scaffolding and imaging systems has been reported. These are well documented, but many hot issues should be examined and reviewed. Herein, a review is given on dendritic nanopolymers and their applications that show promise in the field of regenerative medicine. This review begins with a brief overview on research merging nanotechnology and regenerative medicine. Fundamentals of the synthesis and macromolecular structure of dendritic polymers are provided. Dendrimers fulfill the requirements as carriers for gene, nucleic acids, bioactive molecules and peptide/protein delivery aimed at modulate the cells functions, in vitro and in vivo. However, to make use of this potential, toxicological, drug-loading capacity, surface engineering and host-guest chemistries in dendrimers must be addressed and thus are also discussed. We focus on recent work involving dendrimers with applications in tissue engineering and the central nervous system. Due to their innovative character, applications beyond drug delivery systems became possible, namely as scaffolding and chemoattractants for tissue regeneration, and implantable biodegradable nanomaterialbased medical devices integrated with drug delivery functions (theranostics). Finally, we highlight promising areas for further research and comment on how and why dendrimer and dendron technology should be viewed as the next generation of biomaterials for the 21st century.

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“…Cucurbiturils (CBs, from the latin word cucurbitum, meaning pumpkin) have a larger internal diameter at the center of the capsule than at the portals [67,68] . The symmetric upper and lower portals are fl anked by highly polar oxygens of carbonyl groups of glycuril units (from 5 to 8 for CB [5] to CB [8] , respectively) and control the access to the interior of the empty cavity by steric and polarity effects. The barrel shape of CB is such that if gold atoms assemble inside cucurbituril to form nanoparticles (from 0.7 to 1.3 nm size, depending on the dimensions of the CB used), then the resulting embedded gold nanoparticle cannot exit the capsule and remains entrapped inside.…”

Section: Stabilized Gold Nanoparticlesmentioning

confidence: 99%

Supported Gold Nanoparticles as Oxidation Catalysts

Corma

Garcı́a

2007

Nanoparticles and Catalysis

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IntroductionPlatinum, palladium, iridium, copper, silver and other transition noble metals are highly active, promoting many different types of organic reactions including hydrogenations, oxidations, C − C bond formation, etc. [1,2] . In contrast to the high catalytic activity of Pt ( Z = 78) or Ir ( Z = 77), Au ( Z = 79) as a metal has been largely considered devoid of interesting catalytic activity.This assumption of considering gold catalytically inert changed, however, in the late 90s after the seminal contribution of Haruta, who reported that gold nanoparticles are extremely active in promoting the low -temperature, aerobic oxidation of CO to CO 2 [3,4] . Moreover, Haruta and coworkers showed that the catalytic activity of gold appears for particles in the nanometric size range, there being a direct relationship between activity and particle diameter [5,6] .Since this breakthrough, research has been aimed at determining the reaction types that can be effi ciently catalyzed by nanometric gold particles, increasing the catalytic activity of gold by stabilizing nanoparticles against agglomeration, understanding the role of the solid support in the catalytic activity and also demonstrating the similarities and distinctive properties of gold catalysis with respect to catalysis by other noble metals.In this chapter, we will comment on the specifi c properties that arise when the size of the particles is decreased in the length scale of nanometers, how to form and stabilize gold nanoparticles and then on the catalytic oxidation reactions that can be effected by gold, with special emphasis on alcohol oxidation. The high activity of gold nanoparticles supported on nanoparticulated ceria will be described and justifi ed, together with some insights into the mechanism. A specifi c section will be devoted to discussion of the differences in selectivity between gold and palladium catalysts in order to show the general applicability of gold nanoparticles as a catalyst for alcohol oxidation. This chapter will conclude with some prospects for the future trends in aerobic oxidation. 389Nanoparticles and Catalysis. Edited by Didier Astruc

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Metallodendrimers and dendronized gold colloids as nanocatalysts, nanosensors and nanomaterials for molecular electronics

Cited by 35 publications

References 65 publications

Organoiron-mediated dendrimer syntheses with 1→3 connectivity and applications

Organoiron-mediated dendrimer syntheses with 1→3 connectivity and applications

Dendrimers and derivatives as a potential therapeutic tool in regenerative medicine strategies—A review

Supported Gold Nanoparticles as Oxidation Catalysts

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