Experimental and computational studies of pyridine-assisted post-synthesis modified air stable covalent–organic frameworks

Du, Yi; Mao, Kanmi; Kamakoti, Preeti; Ravikovitch, Peter I.; Paur, Charanjit; Cundy, Stephen; Li, Quanchang; Calabro, David C.

doi:10.1039/c2cc30781b

Cited by 76 publications

(57 citation statements)

References 25 publications

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“…While examples of mesoporous boronic acid-based COFs have been reported in the literature 32,113 their chemical instability prevents the usage of these materials for the storage of large molecules such as drugs and enzymes 20,114 Banerjee et al have synthesized a chemically stable and mesoporous imino-based COF (COF-DhaTab), in order to study the adsorption and storage of the enzyme trypsin in the COF pores. However, the application of COFs is still mostly limited to the storage of gas molecules (see above), since most of the COFs synthesized are microporous in nature and their pores are not large enough to hold larger guests, such as enzymes.…”

Section: Cofs For Large Molecule Uptakementioning

confidence: 99%

Covalent organic frameworks based on Schiff-base chemistry: synthesis, properties and potential applications

2016

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Covalent organic-frameworks (COFs) are an emerging class of porous and ordered materials formed by condensation reactions of organic molecules. Recently, the Schiff-base chemistry or dynamic imine-chemistry has been widely explored for the synthesis of COFs. The main reason for this new tendency is based on their high chemical stability, porosity and crystallinity in comparison to previously reported COFs. This critical review article summarizes the current state-of-the-art on the design principles and synthetic strategies toward COFs based on Schiff-base chemistry, collects and rationalizes their physicochemical properties, as well as aims to provide perspectives of potential applications which are at the forefront of research in materials science.

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Section: Cofs For Large Molecule Uptakementioning

confidence: 99%

Covalent organic frameworks based on Schiff-base chemistry: synthesis, properties and potential applications

2016

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“…It is noteworthy that the application of COFs is still mostly limited to the storage of gas molecules, since most of the COFs synthesized are microporous in nature and their pores are not sizable enough to hold larger guests, such as enzymes [38][39][40] . While examples of mesoporous boronic acid-based COFs have been reported in the literature 41,42 their chemical instability prevents the usage of these materials for the storage of drugs and enzymes 43,44 . Since the COF-DhaTab is chemically stable and mesoporous (3.7 nm), we can study the adsorption and storage of the enzyme trypsin into the COF pores.…”

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confidence: 99%

Self-templated chemically stable hollow spherical covalent organic framework

et al. 2015

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Covalent organic frameworks are a family of crystalline porous materials with promising applications. Although active research on the design and synthesis of covalent organic frameworks has been ongoing for almost a decade, the mechanisms of formation of covalent organic frameworks crystallites remain poorly understood. Here we report the synthesis of a hollow spherical covalent organic framework with mesoporous walls in a single-step template-free method. A detailed time-dependent study of hollow sphere formation reveals that an inside-out Ostwald ripening process is responsible for the hollow sphere formation. The synthesized covalent organic framework hollow spheres are highly porous (surface area B1,500 m 2 g À 1 ), crystalline and chemically stable, due to the presence of strong intramolecular hydrogen bonding. These mesoporous hollow sphere covalent organic frameworks are used for a trypsin immobilization study, which shows an uptake of 15.5 mmol g À 1 of trypsin.

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“…For example, the FOF-1 can adsorb 77.0 mg g −1 CO 2 at 273 K/1 bar, which is competitive with that of the reported microporous MOF SNU-150 (70.0 mg g −1 ) [73], and zeolitic imidazolate framework (ZIF-100, 74.8 mg g −1 ) [74]. However, since reversible reactions have been used for the synthesis of crystalline COFs, reversible back-reactions can occur after the synthesis and COFs in general completely decompose even in the presence of ambient humidity [75,76]. Recently, Kandambeth et al [77] synthesized two highly acid-and base-stable crystalline COFs, TpPa-1 and TpPa-2, by a combination of reversible Schiff base reaction and irreversible enol-to-keto tautomerization (Fig.…”

Section: Covalent Organic Frameworkmentioning

confidence: 74%

Microporous Organic Polymers for Carbon Dioxide Capture

Luo

Tan

2014

Green Chemistry and Sustainable Technology

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Microporous organic polymers (MOPs) are a unique class of porous materials consisting solely of the light elements (C, H, O, N, etc.). A series of vivid characteristics of MOPs, such as high-specific surface area, good physicochemical stability, diverse pore dimensions, topologies, and chemical functionalities, make them suitable adsorbents for CO 2 capture. In this chapter, MOPs are categorized into four classes according to the types of organic reactions and the chemical structures of the resulting materials: hypercrosslinked polymers (HCPs), covalent organic frameworks (COFs), polymers of intrinsic microporosity (PIMs), and conjugated microporous polymers (CMPs). For each type of the polymer network, the state-of-the-art development in the design, synthesis, characterization, and the CO 2 sorption performance is reviewed. Strategies for controlling CO 2 uptake capacity and adsorption enthalpy via manipulation of surface area, pore size, and functionality are discussed in detail. These studies would open up many new possibilities for the development of the novel solid sorbents targeting the CO 2 capture process. It is expected that this chapter will not only summarize the main research activities in this field, but also find possible links between basic studies and practical applications. Abbreviations ACMPAcetylene gas mediated conjugated microporous polymers BA Benzyl alcohol BC Benzyl chloride BCMA 9,10-Bis(chloromethyl)anthracene

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Experimental and computational studies of pyridine-assisted post-synthesis modified air stable covalent–organic frameworks

Cited by 76 publications

References 25 publications

Covalent organic frameworks based on Schiff-base chemistry: synthesis, properties and potential applications

Covalent organic frameworks based on Schiff-base chemistry: synthesis, properties and potential applications

Self-templated chemically stable hollow spherical covalent organic framework

Microporous Organic Polymers for Carbon Dioxide Capture

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