Preparation and Catalysis of Poly (.BETA.-cyclodextrin)-Stabilized Palladium Nanoparticles

Shiraishi, Yukihide; Hayashi, Miho; Toshima, Naoki

doi:10.1295/koron.64.74

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…The first example of metal nanoparticles stabilized by a cyclodextrin-grafted polymer was referenced by Shiraishi et al (2007). Palladium nanoparticles, synthesized by refluxing an ethanol/water solution of palladium acetate, were evaluated in the hydrogenation of unsaturated aliphatic and aromatic carboxylic acids.…”

Section: Cyclodextrin-grafted Polymersmentioning

confidence: 99%

Cyclodextrins as multitask agents for metal nano-heterogeneous catalysis: a review

et al. 2021

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Metal nanoparticles, with high surface area to volume ratios and heterogeneous catalytic properties, are a very challenging research area. In the last decades, many efforts have been devoted to the design of supramolecular metal nanoparticles in order to be used in aqueous medium. In catalysis, water is a highly desirable solvent for developing chemical reactions, in accordance with the principles of green chemistry. In this context, the utilization of macrocyclic compounds, in association with transition metal nanoparticles, appears to be a very appealing approach for developing water-dispersible catalytic systems, with high levels of performances and selective molecular recognition abilities. The purpose of this review is to summarize the research done in this field, focusing attention on cyclodextrins by taking advantage of their unique topologies such as their rigid cyclic structure, their ability to form inclusion complexes with molecules of appropriate size and shape, the presence of hydroxyl groups enabling coordination with metal ions.In this review, we discuss the most commonly used methods, which have been reported over the last forty years, for stabilizing catalytically active metal nanoparticles derived from various cyclodextrin-based systems. The most significant and representative examples devoted to the development of such systems are described, with the purpose of increasing stability, recyclability and catalytic activity, using supramolecular chemistry as a remarkable tool. Some pivotal aspects of their synthesis, characterization and catalytic behaviors are presented, with special attention to (i) the development of metal nanoparticles in solvent-dispersed form or immobilized onto supports in the presence of cyclodextrins or their derivatives, (ii) to the multifunctional role of cyclodextrins capable of acting as reducing agents, stabilizing/dispersing agents or mass transfer promoters, even possibly the three and (iii) to the design of more sophisticated catalytic systems, in which the cyclodextrin plays a central role of supramolecular host with dynamic equilibrium.

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Section: Cyclodextrin-grafted Polymersmentioning

confidence: 99%

Cyclodextrins as multitask agents for metal nano-heterogeneous catalysis: a review

et al. 2021

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“…On the other hand, the traial panel as shown in Figure 4 is asked the long‐term stability of nanoparticles. We have recently reported that the poly(γ‐cyclodextrin) (PγCyD) molecule coordinated to palladium nanoparticles at multiple sites, being stable for months at room temperature 23. Even though each coordination bond is weak, the multi‐coordination would result in the strong chemical adsorption of polymer molecule on the SiO 2 nanoparticle surface.…”

Section: Resultsmentioning

confidence: 99%

Fast Electro‐Optic Switching of Twisted Nematic LCD Doped with Cyclodextrin Capped Silica Nanoparticles

Shiraishi

Sugihara

Okamura

et al. 2012

Macromolecular Symposia

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We prepared cyclodextrin (CyD)-capped silica (CyD-SiO 2 ) nanoparticles and poly(cyclodextrin) (PCyD)-capped silica (PCyD-SiO 2 ) nanoparticles. The average diameter of SiO 2 nanoparticles capped by aCyD, bCyD, gCyD and PgCyD are 9.4, 8.4, 10.6, and 6.4 nm, respectively. The nanoparticles were dispersed in liquid crystal; 4 0 -pentyl-4-cyanobiphenyl to construct novel twisted nematic liquid crystal device (TN-LCD). The response time of this TN-LCD in the presence of PgCyD-SiO 2 nanoparticles was faster than that in the absence.

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“…The catalytic activity for 10-undecenoic acid was higher than that for 2-undecenoic acid. [86] 4.10 Other reaction products 1,10-Decanedicarboxylic acid or its dimethyl ester, which are valuable precursors for the perfume industry, can be produced by a cobalt-catalyzed reaction with CO and H 2 in methanol. [87] UA hydrazide 16 is a good corrosion inhibitor for carbon steel both in anodic and cathodic reactions.…”

Section: Hydrogenation Productsmentioning

confidence: 99%

Undecylenic Acid: A Valuable and Physiologically Active Renewable Building Block from Castor Oil

2009

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A lot of attention is currently being paid to the transition to a biobased economy. In this movement, most efforts concentrate on the development of bioenergy applications including bioethanol, biodiesel, thermochemical conversion of biomass, and others. However, in the energy sector other nonbiomass alternatives are known, whereas no valuable alternatives are available when thinking about chemical building blocks. Therefore, it is also essential to develop new routes for the synthesis of bio-based chemicals and materials derived thereof. Such intermediates can originate either from plants or from animals. Castor oil is a non-edible oil extracted from the seeds of the castor bean plant Ricinus communis (Euphorbiaceae), which grows in tropical and subtropical areas. Globally, around one million tons of castor seeds are produced every year, the leading producing areas being India, PR China, and Brazil.2 10-Undecenoic acid or undecylenic acid is a fatty acid derived from castor oil that, owing to its bifunctional nature, has many possibilities to develop sustainable applications.

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Preparation and Catalysis of Poly (.BETA.-cyclodextrin)-Stabilized Palladium Nanoparticles

Cited by 4 publications

References 9 publications

Cyclodextrins as multitask agents for metal nano-heterogeneous catalysis: a review

Cyclodextrins as multitask agents for metal nano-heterogeneous catalysis: a review

Fast Electro‐Optic Switching of Twisted Nematic LCD Doped with Cyclodextrin Capped Silica Nanoparticles

Undecylenic Acid: A Valuable and Physiologically Active Renewable Building Block from Castor Oil

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