Pore surface engineering in porous, chemically stable covalent organic frameworks for water adsorption

Biswal, Bishnu P.; Kandambeth, Sharath; Chandra, Suman; Shinde, Digambar Balaji; Bera, Saibal; Karak, Suvendu; Garai, Bikash; Kharul, Ulhas K.; Banerjee, Rahul

doi:10.1039/c5ta07998e

Cited by 155 publications

(119 citation statements)

References 39 publications

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“…Banerjee and co-workersr eported ac omprehensive study on the pore wall modification of imine-linked COFs by using 12 different organic linkers. [49] Te nC OF structures were synthesized along with C2 (amine)a nd C3 (aldehyde) combination resulting in hexagonal structures (nameda sH -series),a nd the other two structures were C2 (amine) with tetragonal C4 (amine-functionalized porphyrin) structure (T-series). The amine-containing monomers were functionalized with ÀCH 3 , ÀF, ÀNO 2 , ÀOH, ÀN=NÀ groups and the trend of water uptake capacityw as correlated to the nature of the pore walls.…”

Section: Covalent Organic Framework (Cofs)mentioning

confidence: 99%

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Advances in Porous Organic Polymers for Efficient Water Capture

Byun

Talapaneni

et al. 2019

Chemistry A European J

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Desiccant driven dehumidification for maintaining the proper humidity levels and atmospheric water capture with minimum energy penalty are important aspects in heat pumps, refrigeration, gas and liquid purifications, gas sensing, and clean water production for improved human health and comfort. Water adsorption by using nanoporous materials has emerged as av iable alternative to energy-intensive industrial processes,t hus understanding the significance of their porosity,h igh surface areas, vast pore volumes, chemical and structural features relative to the water adsorption is quite important. In this review article, important features of nanoporousm aterials are presented, including zeolites, porouscarbons, as well as crystalline and amorphous porous organicp olymers (POPs) to define the interactions between the water molecules and the polar/non-polar functional groups on the surface of thesen anoporous materials. In particular,f ocus is placed on the recent developments in POPs in the contexto fw ater capture as ar esult of their remarkable stability towards water and wider ange of availables ynthetic routes and buildingb locks for their synthesis. We also highlighted recenta pproaches to increase the water sorption capacity of POPs by modifyingt heir structure, morphology,p orosity,a nd chemical functionality while emphasizing their promisingf uture in this emerging area.

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Section: Covalent Organic Framework (Cofs)mentioning

confidence: 99%

“…(a) Waters orption profiles of COFs synthesized by using acetic acid as ac atalyst. (b) Water uptake isothermso fCOFsobtained by using PTSA-H 2 Oas ac atalyst.Reprinted from Refs [49]. and[50],r espectively.…”

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confidence: 99%

Advances in Porous Organic Polymers for Efficient Water Capture

Byun

Talapaneni

et al. 2019

Chemistry A European J

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“…These reflections are comparable to previously reported solvothermal-based COFs and the simulated patterns (Supplementary Figure S4). 22,31,39 However, these features were not observed at 10 min. Note that the broadness of the PXRD peaks for the β-ketoenamine-linked COFs is a well-established phenomenon, which likely originates from stacking faults or dislocations, displaying an inter-layer distance estimated at~3.4 Å.…”

Section: Resultsmentioning

confidence: 90%

Intensified synthesis and post-synthetic modification of covalent organic frameworks using a continuous flow of microdroplets technique

et al. 2018

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Covalent organic frameworks (COFs) are two-dimensional/three-dimensional crystalline polymeric materials with diverse molecular backbones and topologies and are strong candidates for numerous applications. However, the ready availability of these materials is a challenge. The key issues are slow production rates, harsher and longer reaction conditions, and a need for post-synthetic modification to obtain desired molecular functionalities. Only a few studies, including those using microfluidic techniques, have focused on refining these factors, but these reports lack synthetic continuity and scalability. Herein, we present a fast, intensified and continuous synthesis and post-synthetic modification of β-ketoenamine-linked COFs by confining organic building units into moving microdroplets in a transparent capillary. This study introduces a one-step, facile approach to serially modify NO 2 -to NH 2 -substituted COFs in a fraction of the time, effort and cost of traditional methods. These results may stimulate the development of novel COFs with unique chemistries and functions for various applications.

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“…Since, directional bonding principles confer superior thermal and chemical stabilities, COPs also offer a combination of properties not found in other materials such as modularity (platform for designed molecular assembly that has not yet been fully exploited), crystallinity (ordered structures of COPs facilitate their design and enables characterization using diffraction techniques. Structural studies and computational tools provide predictive and powerful insight into their properties), porosity (assembly of monomers into 2D and 3D networks yields periodic, uniform voids with tailorable hydrophobicity, chemical affinity, or molecular functionality along their walls), s tability (as COPs are composed of robust covalent bonds, the typical frameworks are stable to temperatures exceeding 300 °C and are insoluble in solvents that do not interfere with their linkages or stacking), and low density (Composed of lightweight elements COPs can offer preferred choices for energy and molecular storage and the availability of confined space with high surface area, porosity, chemical tunability and structural regularity makes them versatile supports for various high performance catalysts and catalytically active NPs) …”

Section: Covalent Organic Polymersmentioning

confidence: 99%

Chemistry in Confinement: Copper and Palladium Catalyzed Ecofriendly Organic Transformations within Porous Frameworks

Kumar

Pitchumani

2017

The Chemical Record

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A concise account on the use of transition metals copper (Cu) and palladium (Pd), as their cations as well as nanoparticles exchanged/immobilized onto porous frameworks such as zeolites, metal organic frameworks (MOFs), covalent organic polymers (COPs) and hollow nanostructures, functioning as catalysts in organic synthesis is presented. This biomimetic account, "focusing on catalytic systems in confinement" within zero-dimensional microenvironments and second sphere coordination covers primarily results from our group on N-sulfonylketenimine mediated cycloaddition, hydrogenation and C-C bond forming reactions, thus providing an interesting insight into the versatility and utility of these Cu and Pd catalysts. Other significant advantages and green credentials of confinement such as stability, selectivity, reusability, promotion of multicomponent reactions, use of green solvents, atom economy, and use of ambient conditions are highlighted at appropriate places. In the final section, our views on the current achievements and the future prospects in this area are summarized.

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Pore surface engineering in porous, chemically stable covalent organic frameworks for water adsorption

Abstract: In this investigation, we have explored the possibility of a class of chemically stable covalent organic frameworks (COFs) as water adsorbing materials through pore surface engineering.

Cited by 155 publications

References 39 publications

Advances in Porous Organic Polymers for Efficient Water Capture

Advances in Porous Organic Polymers for Efficient Water Capture

Intensified synthesis and post-synthetic modification of covalent organic frameworks using a continuous flow of microdroplets technique

Chemistry in Confinement: Copper and Palladium Catalyzed Ecofriendly Organic Transformations within Porous Frameworks

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