%0 Journal Article
%A García, R.
%A Gómez-Hortigüela, L.
%A Díaz, I.
%A Sastre, E.
%A Pérez-Pariente, J.
%D 2008
%T Synthesis of Materials Containing Ferrierite Layers Using Quinuclidine and 1-Benzyl-1-methylpyrrolidine as Structure-Directing Agents. An Experimental and Computational Study
%U https://acs.figshare.com/articles/journal_contribution/Synthesis_of_Materials_Containing_Ferrierite_Layers_Using_Quinuclidine_and_1_Benzyl_1_methylpyrrolidine_as_Structure_Directing_Agents_An_Experimental_and_Computational_Study/2958172
%R 10.1021/cm702098j.s001
%2 https://acs.figshare.com/ndownloader/files/4657129
%K zeolitic materials
%K Synthesi
%K cage
%K bulkier bmp
%K synthesis strategy
%K PREFER
%K Computational results
%K zeolitic phases
%K interlayer separation
%K quinuclidine molecule
%K ferrierite crystals
%K gel composition
%K Materials Containing Ferrierite Layers
%K ferrierite layers
%K fluoride medium
%K Computational StudyA
%K MCM
%X A successful synthesis strategy consisting in the combination of two structure-directing agents of different size, quinuclidine and 1-benzyl-1-methylpyrrolidinium (bmp), has been applied to produce zeolitic materials from alkali-free gels in fluoride medium. Two temperatures (150 and 135 °C) were initially tried, as this small difference of 15 °C is crucial for obtaining different types of zeolitic phases for the same gel composition. Synthesis at 135 °C rendered a crystalline material formed by the stacking of ferrierite layers along the direction perpendicular to the sheet. This layered product is different from others ferrierite-related layered precursors, like PREFER, MCM-47, and MCM-65. Computational studies show that the quinuclidine molecule is preferentially accommodated inside the [586682] ferrierite cages, which are formed as a consequence of the condensation of the sheets, while the bulkier bmp is located in the 10-membered-ring zeolite channels. Computational results suggest that quinuclidine is too bulky to be accommodated inside the cages of hypothetical full-sheet connected three-dimensional ferrierite crystals and therefore yields a material with a higher interlayer separation.
%I ACS Publications