Continuous flow synthesis of ordered porous materials: from zeolites to metal–organic frameworks and mesoporous silica

Liu, Zhendong; Zhu, Jin; Peng, Chao-Chung; Wakihara, Toru; Okubo, Tatsuya

doi:10.1039/c9re00142e

Cited by 56 publications

(45 citation statements)

References 214 publications

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“…Another key advantage of flow processing is that precise and reproducible access to well‐defined (typically very short) reaction times can be achieved by varying the respective reactor volumes or flow rates . Recently, it has been demonstrated that MOFs can be prepared with controlled particle size using flow technology . Specifically, ZIF‐8 has been produced in flow using a variety of equipment and procedures .…”

Section: Figurementioning

confidence: 99%

Continuous‐Flow Synthesis of ZIF‐8 Biocomposites with Tunable Particle Size

et al. 2020

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Zeolitic imidazolate framework (ZIF) biocomposites show the capacity to protect and deliver biotherapeutics. To date, the progress in this research area is based on laboratory batch methods. Now, the first continuous flow synthetic method is presented for the encapsulation of a model protein (bovine serum albumin, BSA) and a clinical therapeutic (α1‐antitrypsin, AAT) in ZIF‐8. The in situ kinetics of nucleation, growth, and crystallization of BSA@ZIF‐8 were studied by small‐angle X‐ray scattering. By controlling the injection time of ethanol, the particle growth could be quenched by ethanol‐induced crystallization from amorphous particles to ZIF‐8 crystals. The particle size of the biocomposite was tuned in the 40–100 nm range by varying residence time prior to introduction of ethanol. As a proof‐of‐concept, this procedure was used for the encapsulation of AAT in ZIF‐8. Upon release of the biotherapeutic from the composite, the trypsin inhibitor function of AAT was preserved.

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Section: Figurementioning

confidence: 99%

Continuous‐Flow Synthesis of ZIF‐8 Biocomposites with Tunable Particle Size

et al. 2020

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“…[11][12][13][14][15][16]31 Metal-organic frameworks (MOFs) are very useful crystalline hybrid porous materials, based on the coordination chemistry between metal nodes and organic ligands. [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] MOFs have attracted considerable attention in the context of various potential applications [32][33] such as gas storage, [34][35] drug delivery, 39 sensing, 40 catalysis, 38,[41][42] molecular recognition, 43 electronics 44 , separation, 45 and water-gas shift reactions, 49 due to their unique properties, such as high surface area, crystalline structure and tunable pore size. In addition, it is possible to generate chiral MOF surfaces by introducing chiral ligands.…”

Section: Introductionmentioning

confidence: 99%

Chiral Macroporous MOF Surfaces for Electroassisted Enantioselective Adsorption and Separation

Suttipat

Butcha

Assavapanumat

et al. 2020

ACS Appl. Mater. Interfaces

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The development of surfaces with chiral features is a fascinating challenge for modern material science, especially when they are used for chiral separation technologies. In this contribution, the design of hierarchically structured chiral macroporous ZIF-8 electrodes is presented. They are elaborated by an electrochemical depositiondissolution technique, based on the electrodeposition of metal through a colloidal crystal template, followed by controlled electrooxidation. This generates locally metal cations, which can interact with a chiral ligand present in solution to form Metal-Organic Frameworks (MOFs). The macroporous structure facilitates the access of the chiral recognition sites, located in the mesoporous MOF and thus helps to overcome mass transport limitations. The efficiency of the designed functional materials for chiral adsorption and separation can be fine-tuned by applying an adjustable electric potential to the electrode surfaces. This hierarchical chiral ZIF-8 structure was deposited at the walls of a microfluidic device and used as a stationary phase for enantioselective separation. The potential-controlled interaction between the stationary phase and the chiral analytes allows baseline separation of two enantiomers. This opens up interesting perspectives for using hierarchically structured chiral MOF as an efficient material for the selective adsorption and separation of chiral compounds.

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“…[20][21][22] This kind of material not only maintains the original high melting point, low density, good dielectric properties of POSS, but also has the properties of heat resistance, pressure resistance, flame retardancy and high hardness. [23][24][25] More important, the cage structure of POSS will form nano porous in the matrix resin to reduce the dielectric constant. At present, most of the researches focus on using functional POSS to modify resin.…”

Section: Introductionmentioning

confidence: 99%

Epoxy/benzoxazinyl POSS nanocomposite resin with low dielectric constant and excellent thermal stability

Feng

Zhang

et al. 2020

J of Applied Polymer Sci

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Benzoxazinyl modified polyhedral oligomeric silsesquioxane (BZPOSS) is successfully synthesized and used to prepare nanocomposites with bisphenol A type epoxy resin (E51). The differential scanning calorimetry results showed the curing peak temperature of E51/BZPOSS blend decrease to 242 C, suggesting the high catalytic activity of BZPOSS to the polymerization of E51. The scanning electron microscope micrographs of poly(E51/BZPOSS)s and silicon element distribution maps given by EDS both demonstrated homogeneous dispersion of BZPOSS. Dielectric properties tests confirmed the dielectric constant can be reduced by the introduction of BZPOSS, which is attributed to the nano-pores from the cage structure of POSS. When 20 wt% BZPOSS was added, the dielectric constant decreased to 2.28 at 1 MHz. Meanwhile, DMA and TGA results indicated the thermal stability and heat resistance of poly(E51/BZPOSS)s at high temperature increased with the increase of BZPOSS, which is due to the increase of the crosslinking density and the change of crosslinking structure of copolymer.

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Continuous flow synthesis of ordered porous materials: from zeolites to metal–organic frameworks and mesoporous silica

Abstract: Herein we review the concepts, challenges and recent developments on the continuous flow synthesis of ordered porous materials.

Cited by 56 publications

References 214 publications

Continuous‐Flow Synthesis of ZIF‐8 Biocomposites with Tunable Particle Size

Continuous‐Flow Synthesis of ZIF‐8 Biocomposites with Tunable Particle Size

Chiral Macroporous MOF Surfaces for Electroassisted Enantioselective Adsorption and Separation

Epoxy/benzoxazinyl POSS nanocomposite resin with low dielectric constant and excellent thermal stability

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