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

From Microporous to Mesoporous Molecular-Sieve Materials and Their Use in Catalysis

3.2.3. Hydroformylation 2467 3.2.4. Dimerization 2468 3.2.5. Oxidative Cleavage and Ozonolysis 2469 3.2.6. Metathesis 2470 4. Terpenes 2472 4.1. Pinene 2472 4.1.1. Isomerization: R-Pinene 2472 4.1.2. Epoxidation of R-Pinene 2475 4.1.3. Isomerization of R-Pinene Oxide 2477 4.1.4. Hydration of R-Pinene: R-Terpineol 2478 4.1.5. Dehydroisomerization 2479 4.2. Limonene 2480 4.2.1. Isomerization 2480 4.2.2. Epoxidation: Limonene Oxide 2480 4.2.3. Isomerization of Limonene Oxide 2481 4.2.4. Dehydroisomerization of Limonene and Terpenes To Produce Cymene 2481

Chemical Routes for the Transformation of Biomass into Chemicals

Luminescent Functional Metal–Organic Frameworks

Photoinduced reactivity of titanium dioxide

Synthesis of metal-organic frameworks (MOFs): routes to various MOF topologies, morphologies, and composites.

The structure of MOF-5 is considered as being constructed of discrete semiconductor Zn4O13 quantum dots stabilized and interconnected by terephthalate linkers. Terephthalate can absorb light and se...

Applications for Metal−Organic Frameworks (MOFs) as Quantum Dot Semiconductors

Hydrothermal stabilization of ZSM-5 catalytic-cracking additives by phosphorus addition

Synthesis and characterization of the MCM-22 zeolite

Determination of base properties of hydrotalcites: Condensation of benzaldehyde with ethyl acetoacetate

The synthesis of pure silica MWW type zeolite ITQ-1 using trimethyladamantammonium (TMAda+) is described. The reproducibility of the synthesis, as well as the quality of the materials obtained, is greatly improved if the synthesis is assisted by hexamethyleneimine (HMI) as a second organic additive. As TMAda+ is too large to fit into the sinusoidal 10 MR channel (i.e., the channel delimited by a ring of 10 tetrahedra), the stabilization of this channel seems to require the presence of additional organic moieties. In the absence of HMI, these probably come from either the partial degradation of TMAda+ or from organics adsorbed on the PTFE liners in previous syntheses. The use of TMAda+ and HMI and Na+ cations allows a fast and highly reproducible synthesis of pure silica ITQ-1. The material obtained shows an improved crystallinity in both the as-made and the calcined form. The structure of calcined ITQ-1 has been refined in space group P6/mmm (a = 14.2081(1) A, c = 24.945(2) A, Rexp = 0.103, Rwp = 0.159, R...

A. Corma

Papers

Applications for Metal−Organic Frameworks (MOFs) as Quantum Dot Semiconductors

Hydrothermal stabilization of ZSM-5 catalytic-cracking additives by phosphorus addition

Synthesis and characterization of the MCM-22 zeolite

Determination of base properties of hydrotalcites: Condensation of benzaldehyde with ethyl acetoacetate

Synthesis and Structural Characterization of MWW Type Zeolite ITQ-1, the Pure Silica Analog of MCM-22 and SSZ-25