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2015 ; 6
(11
): 6320-6324
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One-pot synthesis of MWW zeolite nanosheets using a rationally designed organic
structure-directing agent
#MMPMID26478803
Luo HY
; Michaelis VK
; Hodges S
; Griffin RG
; Román-Leshkov Y
Chem Sci
2015[Nov]; 6
(11
): 6320-6324
PMID26478803
show ga
A new material MIT-1 comprised of delaminated MWW zeolite nanosheets is
synthesized in one-pot using a rationally designed organic structure-directing
agent (OSDA). The OSDA is comprised of a hydrophilic head segment that resembles
the OSDA used to synthesize the zeolite precursor MCM22(P), a hydrophobic tail
segment that resembles the swelling agent used to swell MCM22(P), and a
di-quaternary ammonium linker that connects both segments. MIT-1 features high
crystallinity and surface areas exceeding 500 m(2)g(-1), and can be synthesized
over a wide synthesis window that includes Si/Al ratios ranging from 13 to 67.
Characterization data reveal high mesoporosity and acid strength with no
detectable amorphous silica phases. Compared to MCM-22 and MCM-56, MIT-1 shows a
three-fold increase in catalytic activity for the Friedel-Crafts alkylation of
benzene with benzyl alcohol.