• acid-base cata
  • To explore the potential of perovskites in acid-base catalysis, we. (ornl.gov)
  • Brønsted studied a number of acid- and base-catalyzed reactions, including (1) the acid-catalyzed hydrolysis of an ester , ethyl orthoacetate, (2) the basic catalysis of nitramide decomposition (H 2 N-NO 2 → H 2 O + N 2 O), and (3) the acid-base catalysis of the conversion (mutarotation) of glucose to a closely related form. (britannica.com)
  • catalyst
  • Advances in tools for catalyst characterization and theoretical/computational catalysis. (nsf.gov)
  • Catalysis (/kəˈtælɪsɪs/) is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst (/ˈkætəlɪst/), which is not consumed in the catalyzed reaction and can continue to act repeatedly. (wikipedia.org)
  • In specific acid catalysis, protonated solvent is the catalyst. (wikipedia.org)
  • Challenges in the development of Lewis acid catalysis include inefficient catalyst turnover (caused by catalyst affinity for the product) and the frequent requirement of two-point binding for stereoselectivity, which often necessitates the use of auxiliary groups. (wikipedia.org)
  • In reactions with polar mechanisms, Lewis acid catalysis often involves binding of the catalyst to Lewis basic heteroatoms and withdrawing electron density, which in turn facilitates heterolytic bond cleavage (in the case of Friedel-Crafts reaction) or directly activates the substrate toward nucleophilic attack (in the case of carbonyl addition reactions). (wikipedia.org)
  • In all cases, the close association of the catalyst molecule to substrate also makes hydrogen-bond catalysis a powerful method of inducing enantioselectivity. (wikipedia.org)
  • Phase-transfer catalyst H. Nur, S. Ikeda and B. Ohtani, Phase-boundary catalysis: a new approach in alkene epoxidation with hydrogen peroxide by zeolite loaded with alkylsilane-covered titanium oxide, Chemical Communications, 2000, 2235 - 2236. (wikipedia.org)
  • publishes
  • Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. (springer.com)
  • The journal only publishes special issues ( Proposing a Catalysis Today Special Issue ), each of which is supervised by Guest Editors who recruit individual. (elsevier.com)
  • The journal publishes research in the applied, fundamental, experimental and computational areas of catalysis. (wikipedia.org)
  • Catalysis Science & Technology publishes the following types of articles: Full Papers (original scientific work) Communications (preliminary accounts that merit urgent publication) Mini-reviews (short accounts of the published articles on the topic of catalysis) Perspectives (personal accounts or critical analyses of specialist areas) Catalysis Science & Technology is abstracted and indexed in the Science Citation Index and Scopus. (wikipedia.org)
  • reaction
  • Professor Hagen's teaching and research at the faculty of Chemical and Process Engineering focused on chemical reaction engineering and technical catalysis. (wiley-vch.de)
  • A closely related field of study is asymmetric catalysis which requires molecular recognition to differentiate two chiral starting material or chiral transition states and thus it could be categorized as an area of supramolecular catalysis, but supramolecular catalysis however does not necessarily have to involve asymmetric reaction. (wikipedia.org)
  • Photoredox catalysis is a branch of catalysis that harnesses the energy of light to accelerate a chemical reaction via single-electron transfer events. (wikipedia.org)
  • Play media Enzyme catalysis is the increase in the rate of a chemical reaction by the active site of a protein. (wikipedia.org)
  • That is, the chemical catalysis is defined as the reduction of Ea‡ (when the system is already in the ES‡) relative to Ea‡ in the uncatalyzed reaction in water (without the enzyme). (wikipedia.org)
  • After binding takes place, one or more mechanisms of catalysis lowers the energy of the reaction's transition state, by providing an alternative chemical pathway for the reaction. (wikipedia.org)
  • There are six possible mechanisms of "over the barrier" catalysis as well as a "through the barrier" mechanism: Enzyme-substrate interactions align the reactive chemical groups and hold them close together in an optimal geometry, which increases the rate of the reaction. (wikipedia.org)
  • In acid catalysis and base catalysis a chemical reaction is catalyzed by an acid or a base. (wikipedia.org)
  • In general acid catalysis all species capable of donating protons contribute to reaction rate acceleration. (wikipedia.org)
  • biomass
  • Target applications include fuels, specialty and bulk chemicals, environmental catalysis, biomass conversion to fuels and chemicals, conversion of greenhouse gases, and generation of solar hydrogen, as well as efficient routes to energy utilization. (nsf.gov)
  • Renewable energy-related catalysis with applications in electrocatalysis, photocatalysis, and catalytic conversion of biomass-derived chemicals. (nsf.gov)
  • alkene
  • Abstract H. Nur, S. Ikeda and B. Ohtani, Phase-boundary catalysis of alkene epoxidation with aqueous hydrogen peroxide using amphiphilic zeolite particles loaded with titanium oxide, Journal of Catalysis, 2001, (204) 402 - 408. (wikipedia.org)
  • chiral
  • Commonly, the magnetic catalysis is specifically associated with spontaneous breaking of flavor or chiral symmetry in quantum field theory, which is enhanced or triggered by the presence of an external magnetic field. (wikipedia.org)
  • complexes
  • It treats historical background, concepts (including structures of mono- and polymetallic complexes), molecular orbitals, reactivity, implications in biology and applications to organic synthesis and catalysis. (worldcat.org)
  • Many transition metals and transition metal complexes are used in catalysis as well. (wikipedia.org)
  • Fundamentals
  • A major portion of the group's basic research is aimed at research into the Fundamentals of Catalysis and Chemical Transformations sponsored by the DOE's Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division. (ornl.gov)
  • functionalization
  • This type of catalysis allows for the functionalization of simple alkenes into aldehydes and gives a remarkably useful handle to generate other functional groups. (wikipedia.org)
  • Research
  • This topic touches a myriad of aspects in the broad spectrum of catalysis research. (rsc.org)
  • However, chemists have only recently attempted to harness the power of using hydrogen bonds to perform catalysis, and the field is relatively undeveloped compared to research in Lewis acid catalysis. (wikipedia.org)
  • donors
  • In these cases, catalysis with hydrogen-bond donors is an attractive strategy since the anionic tetrahedral intermediates are better hydrogen-bond acceptors than the starting compound. (wikipedia.org)
  • Journal
  • The journal documents today's emerging and critical trends in all branches of catalysis. (springer.com)
  • ACS Catalysis was awarded the Association of American Publishers' PROSE Award for "Best New Journal in Science, Technology & Medicine" in 2013. (wikipedia.org)