Journal ArticleDOI
Molecular sieve catalysts for the regioselective and shape- selective oxyfunctionalization of alkanes in air.
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Framework-substituted, molecular-sieve, aluminophosphate, microporous solids are the centerpieces of a new approach to the aerobic oxyfunctionalization of saturated hydrocarbons.Abstract:
Framework-substituted, molecular-sieve, aluminophosphate, microporous solids are the centerpieces of a new approach to the aerobic oxyfunctionalization of saturated hydrocarbons. The sieves, and the few percent of the AlIII sites within them that are replaced by catalytically active, transition-metal ions in high oxidation states (CoIII, MnIII, FeIII), are designed so as to allow free access of oxygen in to and out of the interior of these high-area solids. Certain metal-substituted, molecular sieves permit only end-on approach of linear alkanes to the active centers, thereby favoring enhanced reactivity of the terminal methyl groups. By optimizing cage dimension, with respect to that of the hydrocarbon reactant, as well as adjusting the average separation of active centers within a cage, and by choosing the sieve with the appropriate pore aperture, highly selective conversions such as n-hexane to hexanoic acid or adipic acid, and cyclohexane to cyclohexanol, cyclohexanone, or adipic acid, may be effected...read more
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Journal ArticleDOI
State of the art and future challenges of zeolites as catalysts
TL;DR: In this article, the potentiality of nanocrystalline, delaminated, or ultralarge pore catalysts and of zeolites formed by channels with different dimensions is outlined.
Journal ArticleDOI
Lewis acids as catalysts in oxidation reactions: from homogeneous to heterogeneous systems.
TL;DR: This review is focused on the use of solid Lewis acids to promote catalytic oxidations, and the core of the review is organized to show the evolution from the simplest strategy for heterogeneizing homogeneous catalysts, to the more elaborate ones in which the active sites are part of the solid structure.
Journal ArticleDOI
Laboratory evolution of a soluble, self-sufficient, highly active alkane hydroxylase
TL;DR: The evolved alkane hydroxylase was found to be even more active on fatty acids than wild-type BM-3, which was already one of the most efficient fatty acid monooxgenases known.
Journal ArticleDOI
Advances in theory and their application within the field of zeolite chemistry.
Veronique Van Speybroeck,Karen Hemelsoet,Lennart Joos,Michel Waroquier,Robert G. Bell,C. Richard A. Catlow +5 more
TL;DR: In this review most of the currently available modeling tools are introduced and illustrated on the most challenging problems in zeolite science and Directions for future model developments will be given.
References
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Journal ArticleDOI
Reactions of Non-Heme Iron(II) Centers with Dioxygen in Biology and Chemistry
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Thermal, Catalytic, Regiospecific Functionalization of Alkanes
TL;DR: The rhodium complex Cp*Rh(eta(4)-C(6)Me(6)) (Cp*, C(5)Me (5); Me, methyl) catalyzes the high-yield formation of linear alkylboranes from commercially available borane reagents under thermal conditions.
Journal ArticleDOI
Design, Synthesis, and In Situ Characterization of New Solid Catalysts
TL;DR: A wide range of new catalysts may be designed that effect regioselective, shape-selective, and enantioselectives conversions, as well as producing high-performance catalysts for the isomerization and hydrogenation of alkenes and the terminal oxidation of alkanes.
Journal ArticleDOI
Molecular-sieve catalysts for the selective oxidation of linear alkanes by molecular oxygen
TL;DR: In this article, two aluminophosphate molecular sieves containing isolated, four-coordinated Co(III or Mn(III) ions are substituted into the framework and act, in concert with the surrounding framework structure, as regioselective catalysts for the oxidation of linear alkanes by molecular oxygen.
Journal ArticleDOI
Shape selective alkane hydroxylation by metalloporphyrin catalysts
TL;DR: In this paper, a series of manganese and iron porphyrins with sterically protected pockets are shown to be shape selective alkane hydroxylation catalysts, and they demonstrate that the site of oxidation with these oxidants is not metal based.
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