M E Leonowicz

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Molecular sieves with uniform large pores are desirable for chemical reactions and for use in separations involving large molecules. 1 Periodic cubic and hexagonal mesoporous silica phases with uniform large pores have been synthesized by using nonionic triblock and star diblock copolymers as templates. 2 Control over the pore size is achieved by adjusting(More)
The synthesis of inorganic-organic composites and mesoporous materials with structures and functions over different length scales has ramifications in diverse areas, such as large-molecule catalysis, biomolecule separations, miniaturization of electronic devices, chro-matographic supports, the formation of semiconductor nanostructures, and the development(More)
There have been several investigations on the synthesis of inorganics in molecular assemblies such as reverse micelles, 1-4 LB films, 5 vesicles, 5 and block copolymers. 6 Synthetic methodologies are also known for the formation of mesoporous materials 7,8 based on the coassembly of surfactants and ionic species. After calcination these lead to the(More)
Despite success in the synthesis of mesoporous materials in various meso-and macroscopic forms, 1-11 the simultaneous control of pore size and morphology in monolithic structures has been hampered by the lack of a generalized synthetic method suitable to multicomponent systems such as microemulsion multiphase compositions. Known procedures for the(More)
The molecular sieve MCM-22 contains structural features previously unobserved in this class of materials. Its framework topology, derived from high-resolution electron micrographs and refined with synchrotron x-ray diffraction powder data, contains two independent pore systems, both of which are accessed through rings composed of ten tetrahedral (T) atoms(More)
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