Zeotile-2: A microporous analogue of MCM-48

Kremer, Sebastien; Kirschhock, Christine; Aerts, Alexander; Aerts, C.; Houthoofd, Kristof; Grobet, Piet J.; Jacobs, Pierre; Lebedev, Oleg I.; Tendeloo, Gustaaf Van; Martens, Johan A.

doi:10.1016/j.solidstatesciences.2005.01.021

Cited by 12 publications

(16 citation statements)

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“…Alfa S analysis showed that in both materials, the micropore volume was below the detection limit of 0.01 mL/g. In a previous investigation of Zeotile-2 [21] , the presence of micropores was revealed indirectly in the following way. Zeotile-2 contains both a molecular template, viz.…”

Section: Resultsmentioning

confidence: 99%

“…Zeotile-2: The synthesis of Zeotile-2 was performed following a procedure by Kremer et al [11,21]. An amount of TEOS (Acros, 98%) was hydrolyzed in aqueous TPAOH solution (Alfa, 40 wt.-%) at room temperature under stirring, to obtain a mixture with molar TEOS:TPAOH:water ratio of 25:9:152.…”

Section: Mcm-48mentioning

confidence: 99%

“…Zeotile-2 is such a material with mesostructure similar to MCM-48. [11,21] At the mesoscale, MCM-48 has a cubic structure characterized by two independent mesoporous channels separated by gyroid pore walls. [22] In the present work, we compared the adsorption properties of Zeotile-2 and MCM-48 by performing pulse gas chromatographic experiments [23] using n-and iso-alkanes as probe molecules.…”

Section: Introductionmentioning

confidence: 99%

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Shape Selectivity in Adsorption of n‐ and Iso‐alkanes on a Zeotile‐2 Microporous/Mesoporous Hybrid and Mesoporous MCM‐48

Devriese

Cools

Aerts

et al. 2007

Adv Funct Materials

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The adsorption of linear and branched C5–C9 alkanes in the temperature range 50–250 °C on mesoporous MCM‐48 material and its microporous/mesoporous variant Zeotile‐2 at low surface coverage is investigated using the pulse chromatographic technique. On MCM‐48, the differences in adsorption between linear and branched alkanes are merely a result of differences in volatility, indicating that the MCM‐48 material does not present shape‐selective adsorption sites. On Zeotile‐2, there is a preferential adsorption of linear over branched alkanes. The difference arises from a difference in adsorption entropy rather than enthalpy. Upon their adsorption on Zeotile‐2 branched alkanes lose relatively more entropy than their linear isomers do. Zeolitic molecular pockets embedded in the walls of the mesoporous Zeotile‐2 impose steric constraints on the bulky isoalkanes. Zeotile‐2 combines adsorption properties from microporous and mesoporous materials. Compared to the nitrogen molecule, linear and branched C5–C9 alkanes are superior probes for investigating micropores and micropockets in hierarchical materials.

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Section: Resultsmentioning

confidence: 99%

Section: Mcm-48mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shape Selectivity in Adsorption of n‐ and Iso‐alkanes on a Zeotile‐2 Microporous/Mesoporous Hybrid and Mesoporous MCM‐48

Devriese

Cools

Aerts

et al. 2007

Adv Funct Materials

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“…The next major innovation in HTS was proposed by Caremans et al [60] who developed an "all-in-one" automated synthesis and analysis system, with the only manual input being the supply of reagents to the robotic dispenser ( Figure 3A) and the moving of filtrate to the ovens. The all-encompassing automated process described by Caremans et al demonstrated no contamination and was successfully employed in synthesizing zeolite-2, [61] a microporous analog of the amorphous-walled mesoporous MCM-48 material, [62][63][64][65][66] and clathrasil phases, pure silica framework materials where only small molecules are able to pass between cages. [67] Whilst the samples produced by Caremans et al [60] were less crystalline than the reference material, [61] evidenced by the broader peaks in the XRD spectrum, they nonetheless demonstrated that porous silica materials could be produced and analyzed with minimal human input.…”

Section: Implementation Of Robotics and Automationmentioning

confidence: 99%

“…The all-encompassing automated process described by Caremans et al demonstrated no contamination and was successfully employed in synthesizing zeolite-2, [61] a microporous analog of the amorphous-walled mesoporous MCM-48 material, [62][63][64][65][66] and clathrasil phases, pure silica framework materials where only small molecules are able to pass between cages. [67] Whilst the samples produced by Caremans et al [60] were less crystalline than the reference material, [61] evidenced by the broader peaks in the XRD spectrum, they nonetheless demonstrated that porous silica materials could be produced and analyzed with minimal human input. Janssen et al [68] further developed the "all-in-one" automated HT research system proposed by Caremans and colleagues, [60] with Janssen et al developing an automatic workflow for the: i) dispensing of pre-formed zeolite ( Figure 3C), ii) pre-treatment of zeolites ( Figure 3D), and iii) catalytic tests on modified zeolites.…”

Section: Implementation Of Robotics and Automationmentioning

confidence: 99%

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

et al. 2020

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Notwithstanding these impediments, in many fields of materials science, solutions are being designed to mitigate hindrances to the efficient sampling of chemical space and improving the robustness of computational screening models through a combination of high throughput synthesis (HTS), characterization, and machine learning. In this review, we highlight key developments in high throughput approaches pertinent to porous materials. Specifically, we focus on developments in the field of zeolitic materials, metal-organic frameworks (MOFs), and touch upon covalent organic frameworks (COFs). Although superficially these classes of materials have little in common, there are structural links such as topology which allow for the consideration of how high throughput methods contrast with one another. By contrasting developments in different fields, we identify some underutilized approaches which could be leveraged in the future. We target structurally ordered materials because the exploration of chemical and topological space is more straightforward to enumerate, though similar approaches could be applied to disordered materials. The scale of the problem faced in materials science of targeted structure and function [1] is by no means unique; in drug discovery, HTS and chemoinformatic approaches have been used for more than 40 years in an attempt to accelerate the discovery of druggable molecules. [2,3] Unlike the drug discovery process, where Lipinski's "rule of 5" [4] provides a reliable top level sift for viable targets, identifying the most promising material for a target application requires very particular properties that may be intertwined in complex and contradictory ways. For example, thermoelectrics require high electrical conductivity and low thermal conductivity and yet these properties are typically correlated unless they can be separated. [5] Given the large scope of potential applications, the advent of the Materials Genome Initiative (MGI) [6,7] in the United States has undoubtedly helped to promote ways to solve the aforementioned obstacles and numerous others. Similarly there are major initiatives within the EU (e.g., NOMAD [8] and BIGmax [9]) and Switzerland (MARVEL [10]). In the MGI, nanoporous materials, including zeolites and MOFs, have been specifically targeted [11] and in this review, we seek to highlight particular challenges in the field of porous materials and how researchers have sought to overcome these challenges. We focus primarily on the methods used in HTS and rapid throughput/screening computational approaches. Aspects of high throughput computation applied to porous materials have been reviewed before, [12-14] as has high throughput experimentation (HTE) [15,16] but here we focus on their combination within an integrated workflow. Porous materials are widely employed in a large range of applications, in particular, for storage, separation, and catalysis of fine chemicals. Synthesis, characterization, and pre-and post-synthetic computer simulations are mostly carried out in a piecemeal a...

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A Simple Route to Synthesize Mesoporous ZSM‐5 Templated by Ammonium‐Modified Chitosan

Jin

Zhang

et al. 2012

Chemistry A European J

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Uniform mesoporous zeolite ZSM-5 crystals have been successfully fabricated through a simple hydrothermal synthetic method by utilizing ammonium-modified chitosan and tetrapropylammonium hydroxide (TPAOH) as the meso- and microscale template, respectively. It was revealed that mesopores with diameters of 5-20 nm coexisted with microporous network within mesoporous ZSM-5 crystals. Ammonium-modified chitosan was demonstrated to serve as a mesoporogen, self-assembling with the zeolite precursor through strong static interactions. As expected, the prepared mesoporous ZSM-5 exhibited greatly enhanced catalytic activities compared with conventional ZSM-5 and Al-MCM-41 in reactions involving bulky molecules, such as the Claisen-Schmidt condensation of 2-hydroxyacetophenone with benzaldehyde and the esterification reaction of dodecanoic acid and 2-ethylhexanol.

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Zeotile-2: A microporous analogue of MCM-48

Cited by 12 publications

References 50 publications

Shape Selectivity in Adsorption of n‐ and Iso‐alkanes on a Zeotile‐2 Microporous/Mesoporous Hybrid and Mesoporous MCM‐48

Shape Selectivity in Adsorption of n‐ and Iso‐alkanes on a Zeotile‐2 Microporous/Mesoporous Hybrid and Mesoporous MCM‐48

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

A Simple Route to Synthesize Mesoporous ZSM‐5 Templated by Ammonium‐Modified Chitosan

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