Hydrogen bond vs proton transfer in HZSM5 zeolite: A theoretical study

Article Abstract:

The interaction of a large set of bases covering a wide range of the basicity scale with HZSM5 medium-size zeolites is investigated through the use of two model clusters, namely 5T and 7T:63T. The adsorption energies obtained with the 7T:63T cluster are in nice agreement with the most accurate computed values that is reported, although they underestimate the calorimetric measurements.

Hydrogen bonding, Hydrogen bonds, Optical properties, Adsorption

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Crystal structure of zeolite MCM-68: A new three-dimensional framework with large pores

Article Abstract:

The synthesis and crystal structure MCM-68 analysis, a new multidimensional aluminosilicate that has a different 12x10x10-ring channel system is described. The framework model can properly predict observed electron diffraction data in two projections, and the tetragonal projection can be carried out independently from the data by direct methods.

Electric properties, Chemical synthesis

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Preparation and morphology of pyramidal MFI single-crystal segments

Article Abstract:

Postsynthetic treatment of twinned MFI prisms is used for preparing single-crystal segments of tetra-n-propylammonium-templated Silicalite-1 and ZSM-5. The hydroxyl ions are located by single-crystal structure refinement in template-containing Silicalite-1 and ZSM-5 but absent from the calcined samples.

Usage, Crystallization, Atomic properties, X-ray analysis

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