Synthesis of layered MCM-22(P) in the presence of hexamethonium cations and its transformation into EUO- and MWW-type zeolites

Goergen, Simone; Fayad, Elie; Laforge, S.; Magnoux, P.; Rouleau, Loı̈c; Patarin, Joël

doi:10.1007/s10934-010-9421-1

Cited by 11 publications

(11 citation statements)

References 36 publications

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“…68 Diquat SDAs, such as bis(N,N,N-trimethyl)-1,5-pentanediaminium dibromide (diquat-C5) and the 1,6-hexanediaminium homologue, produced disordered, possibly turbostratic materials (e.g., EMM-10). 67,72 The suggested diquat arrangement consisted of two trimethylammonium head groups filling the opposite surface pockets and thus causing layer misalignment because of the long and flexible pentamethylene (C 5 ) and hexamethylene (C 6 ) chains connecting two N atoms.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The corresponding materials can be described as follows. In addition to the MCM-22P (semiordered multilamellar precursor, condensing to ordered 3D framework) and the conventional 3D framework MCM-49/22 (fused/complete 3D framework), the additional distinct examples are illustrated by MCM-56 (monolayers), − EMM-10P (like MCM-22P disordered), , and SSZ-70 (multilayered, layers shifted by discrete vectors). , An additional structure similar to the (expanded) SSZ-70 but without interlayer separation (unexpanded) can be postulated to complete the pattern. It is already known as calcined SSZ-70, which has been assigned a separate structure code ( *-SVY ), but the as-synthesized equivalent has not been made yet.…”

Section: Introductionmentioning

confidence: 99%

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MWW and MFI Frameworks as Model Layered Zeolites: Structures, Transformations, Properties, and Activity

et al. 2021

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Porous solids containing internal pores with sizes ranging from angstroms to nanometers are highly useful and valuable in the catalysis, separation, and storage of molecules because these materials provide large surface areas and void spaces for the interaction and adsorption of molecules. In particular, two-dimensional zeolites (2D, sometimes called layered zeolites) with layer thickness of 2−3 nm (1−2 unit cells) have enabled the synthesis of advanced materials and their application in catalysis for the transformation of bulky substrates unable to enter zeolite pores, thereby substantially increasing the number of zeolite applications and modifications. Accordingly, this Review aims to highlight recent developments in the synthesis, characterization, and application of 2D zeolites, focusing on the two most important representatives, MWW and MFI.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MWW and MFI Frameworks as Model Layered Zeolites: Structures, Transformations, Properties, and Activity

et al. 2021

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“…They are often referred to in the literature as being MWW or related but the distinction from the ordered MCM‐22P is not explicitly invoked as it was made for EMM‐10P 33. These materials may include, in addition to the latter HM‐MWW (hexamethonium‐templated MCM‐22), ITQ‐30, and UZM‐8 52–54…”

Section: Resultsmentioning

confidence: 99%

“…[33] These materials may include, in addition to the latter HM-MWW (hexamethonium-templated MCM-22), ITQ-30, and UZM-8. [52][53][54] This conclusion is tentative and based mainly on the features found in the XRD that are similar to EMM-10P, especially between 2q = 6 and 10 8. Potential differences and their possible significance may be resolved in the future.…”

Section: Nitrogen Adsorptionmentioning

confidence: 99%

A New Family of Two‐Dimensional Zeolites Prepared from the Intermediate Layered Precursor IPC‐3P Obtained during the Synthesis of TUN Zeolite

Kubů

Roth

Greer

et al. 2013

Chemistry A European J

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Abstract:The crystallization of zeolite TUN with 1,4-bis(N-methylpyrrolidinium)butane as template proceeds via an intermediate, designated IPC-3P, following the Ostwald rule of successsive transformations. This apparently layered transient product has been thoroughly investigated and found to consist of MWW monolayers stacked without alignment in register, i.e. disordered compared with MCM-22P. The structure was confirmed based on X-ray diffraction and HRTEM analysis. Layered zeolite precursor IPC-3P can be swollen and pillared affording combined micro-and mesoporous material with enhanced BET surface area (685 m 2 /g) and greater accessibility of Brønsted acid sites for bulky molecules. The latter was probed with 2,6-di-tert-butylpyridine (DTBP). IPC-3P and its modification create a new layered zeolite sub-family belonging to the MWW family. FTIR data indicate that (Al)MWW materials: MCM-22 and IPC-3 with Si/Al >20 exhibit lower relative ratio of Brønsted to Lewis acid sites than MCM-22 with Si/Al around 13, namely less than 2 vs. >3, respectively. This is maintained even upon pillaring and warrants further exploration of materials like IPC-3P with higher Al content. The unique XRD features of IPC-3P indicating mis-aligned stacking of layers and distinct from MCM-22P, are also seen in other MWW materials like EMM-10P, HM-MCM-22 (hexamethonium templated MCM-22), ITQ-30 and UZM-8 suggesting need for more detailed study of their identity and properties.

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“…It should be mentioned that other materials equivalent to EMM-1oP/-10 were reported with other SDAs and include: IPC-3P, 34 ITQ-30, 35 and hexamethonium MCM-22. 36 There is a report of direct synthesis of a swollen MWW material with mono-layers separated by surfactant with interlayer distance of ca 2 nm. 37 However, the preparation entails dissolution of another MWW material (ITQ-1) as substrate so it is not strictly a genuine one-pot preparation from scratch, but a 2-step procedure, so it will not be considered for now.…”

Section: Ujm-1p and Mit-1 As New Types Of Mww Materialsmentioning

confidence: 99%

A new layered MWW zeolite synthesized with the bifunctional surfactant template and the updated classification of layered zeolite forms obtained by direct synthesis

et al. 2019

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Synthesis of layered MCM-22(P) in the presence of hexamethonium cations and its transformation into EUO- and MWW-type zeolites

Cited by 11 publications

References 36 publications

MWW and MFI Frameworks as Model Layered Zeolites: Structures, Transformations, Properties, and Activity

MWW and MFI Frameworks as Model Layered Zeolites: Structures, Transformations, Properties, and Activity

A New Family of Two‐Dimensional Zeolites Prepared from the Intermediate Layered Precursor IPC‐3P Obtained during the Synthesis of TUN Zeolite

A new layered MWW zeolite synthesized with the bifunctional surfactant template and the updated classification of layered zeolite forms obtained by direct synthesis

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