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Árpád Molnár

Bio: Árpád Molnár is an academic researcher from University of Szeged. The author has contributed to research in topics: Catalysis & Dehydrogenation. The author has an hindex of 30, co-authored 216 publications receiving 4886 citations. Previous affiliations of Árpád Molnár include Centre national de la recherche scientifique & Warsaw University of Technology.


Papers
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Journal ArticleDOI
TL;DR: C-C Couplings in Continuous Systems 2308 12.1.
Abstract: 5.4. Miscellaneous Examples 2295 5.4.1. Couplings with Other Catalysts 2295 5.4.2. The Use of Other Boron Reagents 2295 5.4.3. Related Coupling Reactions 2296 5.5. Summary 2297 6. Sonogashira Coupling 2297 6.1. Couplings with Pd Particles 2297 6.2. Studies with Immobilized Palladium Complexes 2299 6.3. Miscellaneous Examples 2301 6.4. Carbonylative Sonogashira Couplings 2302 6.5. Summary 2302 7. Stille Couplings 2302 7.1. Stille Coupling 2302 7.2. Carbonylative Stille Coupling 2304 7.3. Summary 2304 8. Miscellaneous Cross-Coupling Reactions 2304 9. Allylations 2305 9.1. Tsuji-Trost Allylation 2305 9.2. Allylation of Boron Reagents 2306 10. Homocouplings 2307 10.1. Summary 2308 11. C-C Couplings in Continuous Systems 2308 12. Conclusions and Outlook 2311 Author Information 2314 Biography 2314 References 2314

934 citations

Journal ArticleDOI
TL;DR: The results of the last decade with respect to the selective hydrogenation of hydrocarbons with multiple unsaturation (dienes and alkynes) over heterogeneous palladium catalysts are reviewed in this paper.
Abstract: Results of the last decade with respect to the selective hydrogenation of hydrocarbons with multiple unsaturation (dienes and alkynes) over heterogeneous palladium catalysts are reviewed. Factors such as metal dispersion, carbon deposits, and the use of promoters and additives controlling catalytic activities and chemo-, regio- and stereo-selectivity are discussed. A detailed treatment of the status of the selective removal of hydrocarbon impurities with multiple unsaturation from industrial feedstocks is also given.

547 citations

BookDOI
17 Apr 2013
TL;DR: PalladIUM-CATALYZED CROSS-COUPLING REACTIONS -A General InTRODUCTION Introduction Carbon - Carbon Cross-Coupling Reactions Catalyzed by Palladium The Catalysts Mechanistic Aspects Future Challenges High-TURNOVER HETEROGENEOUS PALLADIUM CATALYSTs in COUPLing Reactions: The case of PD LOADED ON DEALUMINATED Y ZEOLITES Introduction Various Methodologies to Afford High Turnover Numbers Over
Abstract: PREFACE PALLADIUM-CATALYZED CROSS-COUPLING REACTIONS - A GENERAL INTRODUCTION Introduction Carbon - Carbon Cross-Coupling Reactions Catalyzed by Palladium The Catalysts Mechanistic Aspects Future Challenges HIGH-TURNOVER HETEROGENEOUS PALLADIUM CATALYSTS IN COUPLING REACTIONS: THE CASE OF PD LOADED ON DEALUMINATED Y ZEOLITES Introduction Various Methodologies to Afford High Turnover Numbers Over Supported Pd Catalysts Structure and Characteristics of Ultrastable Y Zeolites Suzuki - Miyaura Reactions Catalyzed by Pd/USY Catalytic Performance of Pd/USY in Mizoroki - Heck Reactions Conclusion and Perspective PALLADIUM-CATALYZED COUPLING REACTIONS WITH MAGNETICALLY SEPARABLE NANOCATALYSTS Introduction General Considerations Concerning Magnetic Particles as Catalyst Supports Palladium Nanoparticles on Magnetic Supports Molecular Palladium Complexes on Magnetic Supports Outlook THE USE OF ORDERED POROUS SOLIDS AS SUPPORT MATERIALS IN PALLADIUM-CATALYZED CROSS-COUPLING REACTIONS Introduction Catalyst Synthesis and Characterization Carbon - Carbon Couplings Miscellaneous Coupling Reactions The Question of Solution-Phase Catalysis Summary and Future Prospects COUPLING REACTIONS INDUCED BY POLYMER-SUPPORTED CATALYSTS Introduction Polysaccharides Poly(ethylene glycol) Polystyrene Poly(norbornene) Polyacrylamide Polyaniline Poly(N-vinyl-2-pyrrolidone) Polypyrrole Poly(4-vinylpyridine) Ionic Polymers Organometallic Polymers Functionalized Porous Organic Polymers Miscellaneous Polymers Summary and Outlook COUPLING REACTIONS IN IONIC LIQUIDS Introduction Metal Complexes Metal Salts and Metal on Solid Support Metal Nanoparticles Summary and Outlook CROSS-COUPLING REACTIONS IN AQUEOUS MEDIA Introduction Cross-Coupling of Organic Halides to Form C--C Bonds in Aqueous Media Carbon - Heteroatom Coupling Reactions C--H Activation in Aqueous Media Conclusion and Future Prospects MICROWAVE-ASSISTED SYNTHESIS IN C--C AND CARBON - HETEROATOM COUPLING REACTIONS Introduction C--C Bond Formation C--X Bond Formation Conclusions CATALYST RECYCLING IN PALLADIUM-CATALYZED CARBON - CARBON COUPLING REACTIONS Introduction General Issues of Catalyst Recycling Catalyst Systems Providing High, Consistent Yields in Recycling Catalysts Affording the Highest Cumulative TON Values in Recycling Studies Summary Evaluation Future Outlook NATURE OF THE TRUE CATALYTIC SPECIES IN CARBON - CARBON COUPLING REACTIONS WITH HETEROGENEOUS PALLADIUM PRECATALYSTS Introduction Heck Reactions Suzuki Reactions Sonogashira Reactions Concluding Remarks COUPLING REACTIONS IN CONTINUOUS-FLOW SYSTEMS Introduction Coupling Reactions in Flow Palladium Catalysts for Flow Systems Continuous-Flow Technologies for Cross-Coupling Summary and Outlook PALLADIUM-CATALYZED CROSS-COUPLING REACTIONS - INDUSTRIAL APPLICATIONS Introduction Suzuki - Miyaura Reactions Heck - Mizoroki Reactions Sonogashira - Hagihara Reactions Carbonylations Cyanations Negishi Coupling Novel Pd-Catalyzed C--C Cross-Coupling Reaction Buchwald - Hartwig Aminations Pd-Catalyzed C--S Bond Formation Summary and Outlook

188 citations

Journal ArticleDOI
TL;DR: A comprehensive review of the field of recycling catalysis can be found in this paper, where the results of recycling studies performed with a wide range of soluble homogeneous and immobilized complexes as well as heterogeneous catalysts developed in recent years are collected and discussed.

179 citations


Cited by
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Journal ArticleDOI
TL;DR: Corma et al. as mentioned in this paper used the Dupont Award on new materials (1995), and the Spanish National Award “Leonardo Torres Quevedo” on Technology Research (1996) on technology research (1996), to recognize the performance of zeolites as catalysts for oil refining and petrochemistry.
Abstract: It is possible to say that zeolites are the most widely used catalysts in industry They are crystalline microporous materials which have become extremely successful as catalysts for oil refining, petrochemistry, and organic synthesis in the production of fine and speciality chemicals, particularly when dealing with molecules having kinetic diameters below 10 A The reason for their success in catalysis is related to the following specific features of these materials:1 (1) They have very high surface area and adsorption capacity (2) The adsorption properties of the zeolites can be controlled, and they can be varied from hydrophobic to hydrophilic type materials (3) Active sites, such as acid sites for instance, can be generated in the framework and their strength and concentration can be tailored for a particular application (4) The sizes of their channels and cavities are in the range typical for many molecules of interest (5-12 A), and the strong electric fields2 existing in those micropores together with an electronic confinement of the guest molecules3 are responsible for a preactivation of the reactants (5) Their intricate channel structure allows the zeolites to present different types of shape selectivity, ie, product, reactant, and transition state, which can be used to direct a given catalytic reaction toward the desired product avoiding undesired side reactions (6) All of these properties of zeolites, which are of paramount importance in catalysis and make them attractive choices for the types of processes listed above, are ultimately dependent on the thermal and hydrothermal stability of these materials In the case of zeolites, they can be activated to produce very stable materials not just resistant to heat and steam but also to chemical attacks Avelino Corma Canos was born in Moncofar, Spain, in 1951 He studied chemistry at the Universidad de Valencia (1967−1973) and received his PhD at the Universidad Complutense de Madrid in 1976 He became director of the Instituto de Tecnologia Quimica (UPV-CSIC) at the Universidad Politecnica de Valencia in 1990 His current research field is zeolites as catalysts, covering aspects of synthesis, characterization and reactivity in acid−base and redox catalysis A Corma has written about 250 articles on these subjects in international journals, three books, and a number of reviews and book chapters He is a member of the Editorial Board of Zeolites, Catalysis Review Science and Engineering, Catalysis Letters, Applied Catalysis, Journal of Molecular Catalysis, Research Trends, CaTTech, and Journal of the Chemical Society, Chemical Communications A Corma is coauthor of 20 patents, five of them being for commercial applications He has been awarded with the Dupont Award on new materials (1995), and the Spanish National Award “Leonardo Torres Quevedo” on Technology Research (1996) 2373 Chem Rev 1997, 97, 2373−2419

5,290 citations

Journal ArticleDOI
TL;DR: The Review presents the recent developments and the use of NP catalysis in organic synthesis, for example, in hydrogenation and C--C coupling reactions, and the heterogeneous oxidation of CO on gold NPs.
Abstract: Interest in catalysis by metal nanoparticles (NPs) is increasing dramatically, as reflected by the large number of publications in the last five years. This field, "semi-heterogeneous catalysis", is at the frontier between homogeneous and heterogeneous catalysis, and progress has been made in the efficiency and selectivity of reactions and recovery and recyclability of the catalytic materials. Usually NP catalysts are prepared from a metal salt, a reducing agent, and a stabilizer and are supported on an oxide, charcoal, or a zeolite. Besides the polymers and oxides that used to be employed as standard, innovative stabilizers, media, and supports have appeared, such as dendrimers, specific ligands, ionic liquids, surfactants, membranes, carbon nanotubes, and a variety of oxides. Ligand-free procedures have provided remarkable results with extremely low metal loading. The Review presents the recent developments and the use of NP catalysis in organic synthesis, for example, in hydrogenation and C--C coupling reactions, and the heterogeneous oxidation of CO on gold NPs.

2,790 citations

Journal ArticleDOI
TL;DR: This Review will compare the results obtained from different systems and try to give a picture on how different types of metal species work in different reactions and give perspectives on the future directions toward better understanding of the catalytic behavior of different metal entities in a unifying manner.
Abstract: Metal species with different size (single atoms, nanoclusters, and nanoparticles) show different catalytic behavior for various heterogeneous catalytic reactions. It has been shown in the literature that many factors including the particle size, shape, chemical composition, metal–support interaction, and metal–reactant/solvent interaction can have significant influences on the catalytic properties of metal catalysts. The recent developments of well-controlled synthesis methodologies and advanced characterization tools allow one to correlate the relationships at the molecular level. In this Review, the electronic and geometric structures of single atoms, nanoclusters, and nanoparticles will be discussed. Furthermore, we will summarize the catalytic applications of single atoms, nanoclusters, and nanoparticles for different types of reactions, including CO oxidation, selective oxidation, selective hydrogenation, organic reactions, electrocatalytic, and photocatalytic reactions. We will compare the results o...

2,700 citations