Microgel-Stabilized Metal Nanoclusters:  Improved Solid-State Stability and Catalytic Activity in Suzuki Couplings

Biffis, Andrea; Sperotto, Elena

doi:10.1021/la0350709

Cited by 61 publications

(35 citation statements)

References 19 publications

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“…They showed that semiconductors, metal, and magnetic NPs with predetermined size, polydispersity, optical and magnetic properties can be successfully synthesized using polymer microgels as a template, which will have promising applications in catalysis, biolabeling, chemical and biological separation. Biffis et al [17,18,92] have studied the application of microgel-stabilized metal nanoclusters as catalysts for different reactions and confirmed the enhanced catalytic activity of Pd nanoclusters in Heck reaction of activated aryl bromides, which is attributed to the smaller size of the metal nanoclusters. Suzuki and Kawaguchi [93,94] have reported the novel thermosensitive hybrid coreeshell particles via in situ Au or Ag/Au nanoparticle formation using thermosensitive coree shell particles as a template.…”

Section: Applicationsmentioning

confidence: 96%

“Smart” nanoparticles: Preparation, characterization and applications

Ballauff

Lü

2007

Polymer

396

312

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We review recent work on the preparation, characterization and application of ''smart'' microgel particles. A general feature of all systems under consideration here is their ability to react to external stimuli as e.g. the pH or the temperature in the system. Special emphasis is laid on our recent research work on the thermosensitive coreeshell microgel particles, which are composed of a PS core and a cross-linked poly-(N-isopropylacrylamide) (PNIPA) shell. Work done on these coreeshell systems is compared to developments on the investigations of similar systems. A novel synthesis method, namely photo-emulsion polymerization, has been described for the preparation of monodisperse, thermosensitive coreeshell particles. Cryogenic transmission electron microscopy (cryo-TEM) has recently been employed to investigate the morphology and the volume transition of the coreeshell type microgels. This method furnishes information about the thermosensitive particles that had not been available through other methods employed in previous investigations. Very recently, it has been shown that these coreeshell microgels can be used as ''nanoreactors'' for the immobilization of metal nanoparticles. The metal nanocomposite particles show ''smart'' catalytic behaviour, inasmuch as the catalytic activity of nanoparticles can be switched on and off through the volume transition that takes place within the thermosensitive shell of the carrier system. We also discuss possible future applications of these systems.

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Section: Applicationsmentioning

confidence: 96%

“Smart” nanoparticles: Preparation, characterization and applications

Ballauff

Lü

2007

Polymer

396

312

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“…However, the metallic nanoparticles must be stabilized in solution in order to prevent aggregation. Application in catalysis hence requires immobilization in suitable carrier systems such as dendrimers [7][8][9], latex particles [10][11][12][13][14], microgels [15][16][17][18][19][20][21][22], or other polymers [23,24]. In principle, suitable carrier systems may be used as a 'nanoreactor', in which the metal nanoparticles can be immobilized and used for the purpose at hand.…”

Section: Introductionmentioning

confidence: 99%

‘Nano-tree’—type spherical polymer brush particles as templates for metallic nanoparticles

Lü

Walker

et al. 2006

Polymer

146

117

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“…In a study, hybrid fluorescent microgels were prepared via photoactivated synthesis of Ag nanoparticles in PNIPAAm microgels [210]. The PNIPAAm microgels, with a diameter of 200-600 nm, containing acrylic acid and 2-hydroxyethyl acrylate units for better integration of magnetic nanoparticles, have been synthesized recently [211].…”

Section: Stimuli Responsive Polymer-metal Nanocompositesmentioning

confidence: 99%

Multifunctional Polymeric Nanostructures for Therapy and Diagnosis

Contreras-García¹,

Bucio²

2013

Nanomaterials in Drug Delivery, Imaging, and Tissue Engineering

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By definition, nanomaterials are multifunctional due to the co-incorporation of both therapeutic and bioimaging agents. Among the therapeutic applications of the polymeric nanomaterials are found drug, protein or gene delivery, tissue engineering. Other advances in bioapplications include cell-labeling, cell membrane modeling, agent delivery and targeting. Additionally, imaging nanobiotechnology is applied to sensorization and diagnosis with biosensors and biomarkers for biodetection and bioimaging, respectively. In this chapter are described the different polymeric nanostructures applied to therapy and diagnosis such as polymeric-based core-shell colloid, proteins and peptides, drug conjugates and complexes with synthetic polymers, dendrimers, vesicles, micelles, carbon nanotubes, biopolymers, smart nano polymers, metal-polymer complexes, enzyme-responsive nanoparticles, and hybrid polymeric nanomaterials. The different types of polymers are fabricated using several approaches ranging from conventional chemical methods to more sophisticated processes such as surface modification using ionizing radiation to obtain layers free of pollutants without purification and isolation processes among other advantages.

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Microgel-Stabilized Metal Nanoclusters: Improved Solid-State Stability and Catalytic Activity in Suzuki Couplings

Cited by 61 publications

References 19 publications

“Smart” nanoparticles: Preparation, characterization and applications

“Smart” nanoparticles: Preparation, characterization and applications

‘Nano-tree’—type spherical polymer brush particles as templates for metallic nanoparticles

Multifunctional Polymeric Nanostructures for Therapy and Diagnosis

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