2001
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2002
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Zecchina A, Groppo E, Bordiga S. Selective catalysis and nanoscience: an inseparable pair. Chemistry 2007; 13:2440-60. [PMID: 17294491 DOI: 10.1002/chem.200600678] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Selective catalysts can be considered as nanomachines designed to perform the synthesis of molecules with high reaction activity and high selectivity. These properties arise from a precise control of the structure of the active sites, of the three-dimensional environment and of their relationship. In both homogeneous and heterogeneous catalysts the active site three-dimensional environment ensemble is always a complex structure resembling the tuneable structure of enzymes, which are the most efficient catalysts optimized by nature over billions of years. To illustrate this concept the structure of a few homogeneous and heterogeneous catalysts for alkenes hydrogenation and for olefin polymerization are chosen and discussed as examples.
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Affiliation(s)
- Adriano Zecchina
- Department of Inorganic, Physical and Materials Chemistry, NIS (Nanostructured Interfaces and Surfaces) Centre of Excellence and INSTM Centro di Riferimento, University of Torino, Via P. Giuria 7, 10125 Turin, Italy.
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2003
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A water soluble nanostructured platinum (0) metal catalyst from platinum carbonyl molecular clusters: Synthesis, characterization and application in the selective hydrogenations of olefins, ketones and aldehydes. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2007.01.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2004
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Silva ADC, de Souza ALF, Antunes O. Phosphine-free Suzuki cross-coupling reactions under ultrasound. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.03.029] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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2005
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Dendritic Host Molecules with a Polycationic Core and an Outer Shell of Dodecyl Groups. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600727] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2006
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Illa O, Rodríguez-García C, Acosta-Silva C, Favier I, Picurelli D, Oliva A, Gómez M, Branchadell V, Ortuño RM. Cyclopropanation of Cyclohexenone by Diazomethane Catalyzed by Palladium Diacetate: Evidence for the Formation of Palladium(0) Nanoparticles. Organometallics 2007. [DOI: 10.1021/om070141a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ona Illa
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Cristóbal Rodríguez-García
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Carles Acosta-Silva
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Isabelle Favier
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - David Picurelli
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Antonio Oliva
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Montserrat Gómez
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Vicenç Branchadell
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Rosa M. Ortuño
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain, Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès, 1-11, 08028 Barcelona, Spain, and Laboratoire Hétérochimie Fondamentale et Appliquée, UMR CNRS 5069, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
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2007
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Affiliation(s)
- Vasile I Pârvulescu
- Department of Chemical Technology and Catalysis, University of Bucharest, B-dul Regina Elisabeta 4-12, Bucharest 030016, Romania. v_parvulescu@ chem.unibuc.ro
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2008
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Ananikov VP, Orlov NV, Beletskaya IP, Khrustalev VN, Antipin MY, Timofeeva TV. New Approach for Size- and Shape-Controlled Preparation of Pd Nanoparticles with Organic Ligands. Synthesis and Application in Catalysis. J Am Chem Soc 2007; 129:7252-3. [PMID: 17511460 DOI: 10.1021/ja071727r] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Pr. 47, Moscow, 119991, Russia.
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2009
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Ranu BC, Chattopadhyay K. A New Route to the Synthesis of (E)- and (Z)-2-Alkene-4-ynoates and Nitriles from vic-Diiodo-(E)-alkenes Catalyzed by Pd(0) Nanoparticles in Water. Org Lett 2007; 9:2409-12. [PMID: 17488036 DOI: 10.1021/ol0708121] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
An efficient procedure for the stereoselective synthesis of (E)- and (Z)-2-alkene-4-ynoates and -nitriles by a simple reaction of vic-diiodo-(E)-alkenes with acrylic esters and nitriles catalyzed by in situ prepared Pd(0) nanoparticles in water has been developed. Addition of acrylic esters leads to (E)-isomers exclusively, whereas (Z)-isomers are obtained in high stereoselectivity from reactions of acrylonitrile. The aqueous slurry of Pd nanoparticles is recycled. A probable mechanism has been suggested.
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Affiliation(s)
- Brindaban C Ranu
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India
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2010
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Mitsudome T, Nose K, Mori K, Mizugaki T, Ebitani K, Jitsukawa K, Kaneda K. Montmorillonite-Entrapped Sub-nanoordered Pd Clusters as a Heterogeneous Catalyst for Allylic Substitution Reactions. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604644] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2011
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Borchert H, Fenske D, Kolny-Olesiak J, Parisi J, Al-Shamery K, Bäumer M. Ligandenstabilisierte Pt-Nanokristalle als Katalysatoren auf einem Oxidträger: FT-IR-spektroskopische Untersuchungen zur Adsorption und Oxidation von CO. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604460] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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2012
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Borchert H, Fenske D, Kolny-Olesiak J, Parisi J, Al-Shamery K, Bäumer M. Ligand-Capped Pt Nanocrystals as Oxide-Supported Catalysts: FTIR Spectroscopic Investigations of the Adsorption and Oxidation of CO. Angew Chem Int Ed Engl 2007; 46:2923-6. [PMID: 17357165 DOI: 10.1002/anie.200604460] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Holger Borchert
- Institute of Applied and Physical Chemistry (associated member of the Center of Interface Science), University of Bremen, Leobener Strasse, 28359 Bremen, Germany.
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2013
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Donato RK, Migliorini MV, Benvegnú MA, Dupont J, Gonçalves RS, Schrekker HS. The electrochemical properties of a platinum electrode in functionalized room temperature imidazolium ionic liquids. J Solid State Electrochem 2007. [DOI: 10.1007/s10008-007-0304-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2014
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Competitive hydrogenation/dehalogenation of halogenoarenes with surfactant-stabilized aqueous suspensions of rhodium and palladium colloids: A major effect of the metal nature. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.11.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2015
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2016
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Kumar SS, Kumar CS, Mathiyarasu J, Phani KL. Stabilized gold nanoparticles by reduction using 3,4-ethylenedioxythiophene-polystyrenesulfonate in aqueous solutions: nanocomposite formation, stability, and application in catalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:3401-8. [PMID: 17284059 DOI: 10.1021/la063150h] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Herein, we report a one-pot synthesis of highly stable Au nanoparticles (AuNPs) using 3,4-ethylenedioxythiophene (EDOT) as a reductant and polystyrene sulfonate (PSS-) as a dopant for PEDOT and particle stabilizer. The synthesis demonstrated in this work entails the reduction of HAuCl4 using EDOT in the presence of PSS-. The formation of AuNPs with concomitant EDOT oxidation is followed by UV-vis spectroscopy at various time intervals. Absorption at 525 nm is due to the surface plasmon band of AuNPs (violet), and broad absorption above 700 nm is due to oxidized PEDOT that was further characterized to be in its highly oxidized (doped) state, using FT-Raman spectroscopy. Transmission electron microscopy shows a polydisperse nature of the particles, and the selected area electron diffraction pattern reveals the polycrystalline nature of AuNPs. With stabilizers such as sodium dodecylsulfate (SDS) (green) and polyvinylpyrrolidone (PVP) (blue), the absorbance around 525 nm was found to be negligibly small, while PSS- showed high absorbance at 525 nm (violet) and above 700 nm (oxidized PEDOT). PSS- also allows complete oxidation of EDOT and serves as an effective dopant for PEDOT. While AuNPs covered by PEDOT alone cannot be dispersed in aqueous solutions, PSS- renders Au-PEDOT water soluble. The hydrodynamic diameter of the nanocomposite estimated from the dynamic light scattering (DLS) measurements increases in the order Na-PSS < SDS < PVP. Interestingly, the color of the Au(nano)-PEDOT/PSS- aqueous dispersion changed reversibly between violet and blue and vice versa on addition of NaOH and HCl, respectively. This reversible color change appears to be a combination effect of acid/base on the properties of PEDOT, in turn changing the environment around the embedded AuNPs. The nanoparticle dispersion also exhibited very high stability in presence of 3.0 M NaCl. Remarkably, the nanocomposite Au(nano)-PEDOT/PSS- was found to function as an effective catalyst to activate the reduction of 4-nitrophenol to 4-aminophenol in the presence of excess NaBH4, and the calculated apparent rate constant value of 4.39 x 10-2 s-1 is found to be higher than those obtained using other nanocomposites with SDS and PVP and comparable to the values reported in the case of other encapsulants.
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Affiliation(s)
- Shanmugam Senthil Kumar
- Electrodics and Electrocatalysis Division, Central Electrochemical Research Institute, Karaikudi 630 006, India
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2017
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Abstract
Expanding the catalytic environment to a nanosize must be one of the most promising ways to improve the performance of homogeneous catalysts. In this Forum Article, recent developments in homogeneous nanosize palladium catalysts are reviewed. It contains solubilized palladium nanoparticles, metalated dendrimers, and complexes with well-defined nanosized ligands. These systems realize efficient catalyst recycling, unique selectivity, suppression of metal aggregation, and remarkable enhancement of the catalytic activity.
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Affiliation(s)
- Yasushi Tsuji
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
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2018
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2019
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Jiang JZ, Cai C. Copper- and ligand-free Sonogashira reaction catalyzed by palladium in microemulsion. J Colloid Interface Sci 2007; 307:300-3. [PMID: 17141262 DOI: 10.1016/j.jcis.2006.10.087] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2006] [Revised: 10/28/2006] [Accepted: 10/30/2006] [Indexed: 11/20/2022]
Abstract
An oil-in-water microemulsion containing PdCl2 and NaOH can be used as an effective catalyst system for rapid copper- and ligand-free Sonogashira reaction of aryl halides and phenylacetylene. Excellent yield of the Sonogashira reaction catalyzed by 0.5 mol% palladium could be achieved within 5 min. The types of base have an intense influence on the reaction. The reaction rate was increased with increased aqueous content in the microemulsions, and dispersed palladium nanoparticles can be in situ formed without other reductants.
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Affiliation(s)
- Jian-Zhong Jiang
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing, 210094, China
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2020
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Humphrey SM, Grass ME, Habas SE, Niesz K, Somorjai GA, Tilley TD. Rhodium nanoparticles from cluster seeds: control of size and shape by precursor addition rate. NANO LETTERS 2007; 7:785-90. [PMID: 17288491 DOI: 10.1021/nl070035y] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The size-tunable synthesis of poly(vinylpyrrolidone)-stabilized cuboctahedral rhodium nanoparticles with mean diameters ranging between 3-7 nm and multipod structures was accomplished using seeded growth methods. Isotropic PVP-capped 2.9 nm seeds were prepared by ligand exchange on rhodium-triphenylphosphine metal-organic clusters. Quantitative investigation of reaction parameters in ethylene glycol revealed that size and shape could be controlled at a single reaction temperature of 120 degrees C. The rate of rhodium monomer addition was found to be critical for monodispersity and shape control, regardless of thermodynamic factors. Solvent viscosity, varied by changing the polyol solvents, indicated that autocatalytic addition kinetics are responsible for isotropic versus anisotropic growth.
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Affiliation(s)
- Simon M Humphrey
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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2021
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Lu Y, Spyra P, Mei Y, Ballauff M, Pich A. Composite Hydrogels: Robust Carriers for Catalytic Nanoparticles. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200600534] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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2022
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Grafting of palladium nanoparticles onto mesoporous molecular sieve MCM-41: Heterogeneous catalysts for the formation of an N-substituted pyrrol. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.molcata.2006.08.094] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2023
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Balzani V, Bergamini G, Ceroni P, Vögtle F. Electronic spectroscopy of metal complexes with dendritic ligands. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.04.007] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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2024
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Bergamini G, Ceroni P, Maestri M, Lee SK, van Heyst J, Vögtle F. Cyclam cored luminescent dendrimers as ligands for Co(II), Ni(II) and Cu(II) ions. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.07.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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2025
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Yamada YMA, Arakawa T, Hocke H, Uozumi Y. A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water. Angew Chem Int Ed Engl 2007; 46:704-6. [PMID: 17163554 DOI: 10.1002/anie.200603900] [Citation(s) in RCA: 192] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoichi M A Yamada
- Institute for Molecular Science (IMS), Myodaiji, Okazaki, Aichi 444-8787, Japan
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2026
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Yamada Y, Arakawa T, Hocke H, Uozumi Y. A Nanoplatinum Catalyst for Aerobic Oxidation of Alcohols in Water. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603900] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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2027
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Ananikov VP, Orlov NV, Beletskaya IP. Highly Efficient Nickel-Based Heterogeneous Catalytic System with Nanosized Structural Organization for Selective Se−H Bond Addition to Terminal and Internal Alkynes. Organometallics 2007. [DOI: 10.1021/om061033b] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Valentine P. Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russian Federation, and Chemistry Department, Lomonosov Moscow State University, Vorob'evy gory, Moscow, 119899, Russian Federation
| | - Nikolay V. Orlov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russian Federation, and Chemistry Department, Lomonosov Moscow State University, Vorob'evy gory, Moscow, 119899, Russian Federation
| | - Irina P. Beletskaya
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russian Federation, and Chemistry Department, Lomonosov Moscow State University, Vorob'evy gory, Moscow, 119899, Russian Federation
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2028
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Yoon H, Ko S, Jang J. Nitrogen-doped magnetic carbon nanoparticles as catalyst supports for efficient recovery and recycling. Chem Commun (Camb) 2007:1468-70. [PMID: 17389995 DOI: 10.1039/b616660a] [Citation(s) in RCA: 194] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium nanoparticles were deposited with high dispersion and stability on nitrogen-doped magnetic carbon nanoparticles by a simple impregnation method, and their catalytic performance was investigated for Heck, Suzuki, and Sonogashira coupling reactions.
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Affiliation(s)
- Hyeonseok Yoon
- Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul, 151-742, Korea
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2029
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Yamanoi Y, Nishihara H. Assembly of nanosize metallic particles and molecular wires on electrode surfaces. Chem Commun (Camb) 2007:3983-9. [PMID: 17912392 DOI: 10.1039/b703342g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article highlights recent developments in the assembly of nanosize materials on electrode surfaces. A brief historical background of the field is given, followed by a selection of topics of particular current interest. We focus especially on the assembly of nanosize metallic particles and molecular wires on gold and silicon electrode surfaces. The fabrication, properties, and characteristics of functional nanostructured biointerfaces on electrode surfaces are also described.
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Affiliation(s)
- Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-003, Japan
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2030
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Mori K, Miura Y, Shironita S, Tomonari M, Mimura N, Yamashita H. Preparation and catalysis of nano-sized eetal (Pd,Pt) catalysts deposited on Ti-containing zeolite materials by a photo-assisted deposition (PAD) method. FROM ZEOLITES TO POROUS MOF MATERIALS - THE 40TH ANNIVERSARY OF INTERNATIONAL ZEOLITE CONFERENCE, PROCEEDINGS OF THE 15TH INTERNATIONAL ZEOLITE CONFERENCE 2007. [DOI: 10.1016/s0167-2991(07)80994-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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2031
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Denicourt-Nowicki A, Ponchel A, Monflier E, Roucoux A. Methylated cyclodextrins: an efficient protective agent in water for zerovalent ruthenium nanoparticles and a supramolecular shuttle in alkene and arene hydrogenation reactions. Dalton Trans 2007:5714-9. [DOI: 10.1039/b713989f] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2032
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Yamashita H, Miura Y, Mori K, Shironita S, Masui Y, Mimura N, Ohmichi T, Sakata T, Mori H. Catalysis of nanosized Pd metal catalyst deposited on Ti-containing zeolite by a photo-assisted deposition (PAD) method. PURE APPL CHEM 2007. [DOI: 10.1351/pac200779112095] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Using a photo-assisted deposition (PAD) method, nanosized Pd metal can be highly dispersed on Ti-containing silicalite zeolite (TS-1) under UV-light irradiation (PAD-Pd/TS-1). The nanosized Pd metal was deposited directly on the photo-excited tetrahedrally coordinated titanium oxide species (tetra-Ti-oxide) of TS-1 zeolite. Under the flow of H2 and O2 in water solvent, the efficient formation of H2O2 could be observed by the PAD-Pd/TS-1 catalyst under mild reaction conditions (ambient temperature and atmospheric pressure). Furthermore, the presence of phenol in this reaction system led to the formation of the products from the partial oxidation of phenol with the formed H2O2.
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Affiliation(s)
- Hiromi Yamashita
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Yuki Miura
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kohsuke Mori
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Sayoko Shironita
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Yosuke Masui
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Naoki Mimura
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Tetsutaro Ohmichi
- 1Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Takao Sakata
- 2Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Hirotaro Mori
- 2Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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2033
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Ogihara H, Sadakane M, Wu Q, Nodasaka Y, Ueda W. Immobilization of nanofibrous metal oxides on microfibers: A macrostructured catalyst system functionalized with nanoscale fibrous metal oxides. Chem Commun (Camb) 2007:4047-9. [PMID: 17912411 DOI: 10.1039/b708038g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanofibrous LaMnO(3) can be immobilized on macrostructured materials using carbon nanofibers as templates; their application as macro-nanostructured catalysts are also presented.
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Affiliation(s)
- Hitoshi Ogihara
- Catalysis Research Center, Hokkaido University, N21-W10 Kita-ku, Sapporo 001-002, Japan.
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2034
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Gauthier M. Arborescent polymers and other dendrigraft polymers: A journey into structural diversity. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.22242] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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2035
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Giansante C, Ceroni P, Balzani V, Maestri M, Lee SK, Vögtle F. Photophysical, photochemical, and electrochemical properties of dendrimers with a dimethoxybenzil core. NEW J CHEM 2007. [DOI: 10.1039/b615196e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2036
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Sakurai H, Tsunoyama H, Tsukuda T. Oxidative homo-coupling of potassium aryltrifluoroborates catalyzed by gold nanocluster under aerobic conditions. J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.04.054] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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2037
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Ionita P, Conte M, Gilbert BC, Chechik V. Gold nanoparticle-initiated free radical oxidations and halogen abstractions. Org Biomol Chem 2007; 5:3504-9. [DOI: 10.1039/b711573c] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2038
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Migowski P, Machado G, Texeira SR, Alves MCM, Morais J, Traverse A, Dupont J. Synthesis and characterization of nickel nanoparticles dispersed in imidazolium ionic liquids. Phys Chem Chem Phys 2007; 9:4814-21. [PMID: 17712460 DOI: 10.1039/b703979d] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The diameter and size-distribution of Ni nanoparticles prepared by the decomposition of [bis(1,5-cyclooctadiene)nickel(0)] organometallic precursor dissolved in 1-alkyl-3-methylimidazolium N-bis(trifluoromethanesulfonyl) amide ionic liquids depend on the length of the alkyl side-chain of the imidazolium ring. The increase of the organization range order of the ionic liquid that increases with that of the alkyl side-chain (from n-butyl to n-hexadecyl) induces the formation of nanoparticles with a smaller diameter and size-distribution. The cubic fcc Ni nanoparticles with 4.9 +/- 0.9 to 5.9 +/- 1.4 nm in mean diameter and monomodal size-distribution thus prepared are probably composed of a small cap layer of NiO around a core of Ni metal. The contribution of the oxide layer also depends on the medium i.e. the metal oxide ratio increases in salts containing four to eight carbons on their side-chains and then decreases as the number of carbons increases. The Ni nanoparticles dispersed in the ionic liquids are active catalysts for the hydrogenation of olefins under relatively mild reaction conditions.
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Affiliation(s)
- Pedro Migowski
- Laboratory of Molecular Catalysis, Instituto de Química-UFRGS, P.O. Box 15003, Porto Alegre, 91501-970, RS Brazil
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2039
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2040
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Gutel T, Garcia-Antõn J, Pelzer K, Philippot K, Santini CC, Chauvin Y, Chaudret B, Basset JM. Influence of the self-organization of ionic liquids on the size of ruthenium nanoparticles: effect of the temperature and stirring. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b706139k] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2041
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Karam A, Gu Y, Jérôme F, Douliez JP, Barrault J. Significant enhancement on selectivity in silica supported sulfonic acids catalyzed reactions. Chem Commun (Camb) 2007:2222-4. [PMID: 17534497 DOI: 10.1039/b702997g] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thanks to strong hydrophilic interactions between reaction products and the catalyst surface, mesoporous silica supported sulfonic sites were found to be much more selective than homogeneous and common solid acid catalysts.
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Affiliation(s)
- Ayman Karam
- Université de Poitiers, Ecole Supérieure d'Ingénieurs de Poitiers, LACCO UMR 6503 CNRS-Université de Poitiers, 40 avenue du recteur pineau, 86022, Poitiers, France
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2042
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Georgakilas V, Gournis D, Tzitzios V, Pasquato L, Guldi DM, Prato M. Decorating carbon nanotubes with metal or semiconductor nanoparticles. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b700857k] [Citation(s) in RCA: 562] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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2043
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Yin L, Liebscher J. Carbon−Carbon Coupling Reactions Catalyzed by Heterogeneous Palladium Catalysts. Chem Rev 2006; 107:133-73. [PMID: 17212474 DOI: 10.1021/cr0505674] [Citation(s) in RCA: 1584] [Impact Index Per Article: 88.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lunxiang Yin
- Institute für Chemie, Humboldt-Universität Berlin, Brook-Taylor-Strasse 2, D-12489 Berlin, Germany
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2044
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Branchi B, Ceroni P, Bergamini G, Balzani V, Maestri M, van Heyst J, Lee SK, Luppertz F, Vögtle F. A Cyclam Core Dendrimer Containing Dansyl and Oligoethylene Glycol Chains in the Branches: Protonation and Metal Coordination. Chemistry 2006; 12:8926-34. [PMID: 17106914 DOI: 10.1002/chem.200601129] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
We have synthesized a dendrimer (1) consisting of a 1,4,8,11-tetraazacyclotetradecane (cyclam) core, appended with four benzyl substituents that carry, in the 3- and 5-positions, a dansyl amide derivative (of type 2), in which the amide hydrogen is replaced by a benzyl unit that carries an oligoethylene glycol chain in the 3- and 5-positions. All together, the dendrimer contains 16 potentially luminescent moieties (eight dansyl- and eight dimethoxybenzene-type units) and three distinct types of multivalent sites that, in principle, can be protonated or coordinated to metal ions (the cyclam nitrogen atoms, the amine moieties of the eight dansyl units, and the 16 oligoethylene glycol chains). We have studied the absorption and luminescence properties of 1, 2, and 3 in acetonitrile and the changes taking place upon titration with acid and a variety of divalent (Co2+, Ni2+, Cu2+, Zn2+), and trivalent (Nd3+, Eu3+, Gd3+) metal ions as triflate and/or nitrate salts. The results obtained show that: 1) double protonation of the cyclam ring takes place before protonation of the dansyl units; 2) the oligoethylene glycol chains do not interfere with protonation of the cyclam core and the dansyl units in the ground state, but affect the luminescence of the protonated dansyl units; 3) the first equivalent of metal ion is coordinated by the cyclam core; 4) the interaction of the resulting cyclam complex with the appended dansyl units depends on the nature of the metal ion; 5) coordination of metal ions by the dansyl units follows at high metal-ion concentrations; 6) the effect of the metal ion depends on the nature of the counterion. This example demonstrates that dendrimers may exhibit complete functionality resulting from the integration of the specific properties of their component units.
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Affiliation(s)
- Barbara Branchi
- Dipartimento di Chimica G. Ciamician, Università di Bologna, via Selmi 2, 40126 Bologna, Italy
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2045
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Das J, Aziz MA, Yang H. A Nanocatalyst-Based Assay for Proteins: DNA-Free Ultrasensitive Electrochemical Detection Using Catalytic Reduction ofp-Nitrophenol by Gold-Nanoparticle Labels. J Am Chem Soc 2006; 128:16022-3. [PMID: 17165740 DOI: 10.1021/ja0672167] [Citation(s) in RCA: 272] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This communication reports a nanocatalyst-based electrochemical assay for proteins. Ultrasensitive detection has been achieved by signal amplification combined with noise reduction: the signal is amplified both by the catalytic reduction of p-nitrophenol to p-aminophenol by gold-nanocatalyst labels and by the chemical reduction of p-quinone imine to p-aminophenol by NaBH4; the noise is reduced by employing an indium tin oxide electrode modified with a ferrocenyl-tethered dendrimer and a hydrophilic immunosensing layer.
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Affiliation(s)
- Jagotamoy Das
- Department of Chemistry, Pusan National University, Busan 609-735, Korea
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2046
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Ko S, Jang J. A Highly Efficient Palladium Nanocatalyst Anchored on a Magnetically Functionalized Polymer-Nanotube Support. Angew Chem Int Ed Engl 2006; 45:7564-7. [PMID: 17042052 DOI: 10.1002/anie.200602456] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sungrok Ko
- Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, San 56-1 Shinlim Kwanak, Seoul 151-742, Korea
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2047
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Ko S, Jang J. A Highly Efficient Palladium Nanocatalyst Anchored on a Magnetically Functionalized Polymer-Nanotube Support. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602456] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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2048
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Migowski P, Dupont J. Catalytic Applications of Metal Nanoparticles in Imidazolium Ionic Liquids. Chemistry 2006; 13:32-9. [PMID: 17115465 DOI: 10.1002/chem.200601438] [Citation(s) in RCA: 293] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Metal nanoparticles (MNPs) with a small diameter and narrow size distribution can be prepared by H(2) reduction of metal compounds or decomposition of organometallic species dissolved in ionic liquids (ILs). MNPs dispersed in ILs are catalysts for reactions under multiphase conditions. These soluble MNPs possess a pronounced surfacelike rather than single-site like catalytic properties. In other cases the MNPs are not stable and tend to aggregate or serve as reservoirs of mononuclear catalytically active species.
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Affiliation(s)
- Pedro Migowski
- Laboratory of Molecular Catalysis, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre 91501-970 RS, Brazil
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2049
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Gao Y, Bulusu S, Zeng XC. A Global Search of Highly Stable Gold-Covered Bimetallic Clusters M@Aun (n=8–17): Endohedral Gold Clusters. Chemphyschem 2006; 7:2275-8. [PMID: 17009281 DOI: 10.1002/cphc.200600472] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yi Gao
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
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2050
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Ikeda S, Ishino S, Harada T, Okamoto N, Sakata T, Mori H, Kuwabata S, Torimoto T, Matsumura M. Ligand-Free Platinum Nanoparticles Encapsulated in a Hollow Porous Carbon Shell as a Highly Active Heterogeneous Hydrogenation Catalyst. Angew Chem Int Ed Engl 2006; 45:7063-6. [PMID: 17009288 DOI: 10.1002/anie.200602700] [Citation(s) in RCA: 312] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shigeru Ikeda
- Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8531, Japan.
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