Supramolecular Reinforcement of a Large-Pore 2D Covalent Organic Framework

Diwakara, Shashini D.; Ong, Whitney S. Y.; Wijesundara, Yalini H.; Gearhart, Robert L; Herbert, Fabian C.; Fisher, Sarah G; McCandless, Gregory T.; Alahakoon, Sampath B.; Gassensmith, Jeremiah J.; Dodani, Sheel C.; Smaldone, Ronald A.

doi:10.1021/jacs.1c12020

Cited by 26 publications

(25 citation statements)

References 64 publications

(100 reference statements)

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“…Solvent-induced pore collapse is a common phenomenon observed especially during the drying process of large pore COFs, 36 which can be reduced with decreasing polarity of the solvent 37 or by enhanced interlayer interactions. 23,38 As previously reported for certain MOF water harvesting materials, 4 this observation further points to a strong interaction of polar nitrone moieties in NO-TTI-COF with adsorbed water and recalls the necessity for orchestrating different types of interactions to further optimize adsorption properties of COFs. More specifically, fine-tuning of pore channel hydrophilicity can only lead to efficient water adsorption materials if interlayer interactions-as the "opponent" in 2D COFs-are likewise adjusted or, as described for NO-PI-3-COF, are strong enough to withstand capillary forces during water desorption.…”

Section: Water Adsorption Propertiessupporting

confidence: 74%

Post-synthetic Transformation of Imine- into Nitrone-linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity

Grunenberg

Savaşçı

Emmerling

et al. 2023

Preprint

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Herein, we report a facile post-synthetic linkage conversion method giving synthetic access to nitrone-linked covalent organic frameworks from imine- and amine-linked COFs. The new, 2D nitrone-linked covalent organic frameworks, NO-PI-3-COF and NO-TTI-COF are obtained with high crystallinity and large surface areas. Nitrone-modified pore channels induce capillary condensation of water vapor at 20% lower humidity compared to their amine- or imine-linked precursor COFs. Thus, the topochemical transformation to nitrone linkages constitutes an attractive approach to post-synthetically fine-tune water adsorption properties in framework materials.

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Section: Water Adsorption Propertiessupporting

confidence: 74%

Post-synthetic Transformation of Imine- into Nitrone-linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity

Grunenberg

Savaşçı

Emmerling

et al. 2023

Preprint

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“…Long-range ordered nanochannels of COFs provide the ionic conduction pathways, which are beneficial for charging/ discharging kinetics in a rechargeable battery. The pore size of COF can be tuned over a wide range (0.52-6.50 nm), [86][87][88] which can be facilely realized by rationally designing the size and length of the building blocks. Up to now, the pore size of COFs used in rechargeable batteries ranges from 0.56 to 5.06 nm.…”

Section: Pore Size Regulationmentioning

confidence: 99%

Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Cao

Wang

et al. 2022

Advanced Energy Materials

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The ionic conduction plays an important role in the charging/discharging kinetics in rechargeable batteries, mainly including the steps of diffusion in the electrodes, transport in the electrolytes, and permeation through the electrode/electrolyte interphases. [8][9][10] Generally, the ionic transport is a critical control step in the electrochemical reactions, because it is much slower kinetics than electron transport. [8,11] Thus, regulating the ion-transport behavior is very vital to achieve fast-charging secondary batteries. [6,12] Mechanism exploration and novel material design become two important strategies to tackle the sluggish ionconduction kinetics. [13][14][15][16][17] In the secondary battery, the environment of ionic conduction can be roughly divided into liquid electrolytes and solid conductors. The ionic diffusion in the liquid electrolytes can be very fast. However, the flammability of organic solvents and the instability of salts (such as LiPF 6 ) at elevated temperature limit its commercial application. [18,19] The solid conductor is a safer choice to replace the current liquid electrolyte, but still suffers a serious impediment of low ionic conductivity. [20,21] Recently, covalent organic frameworks (COFs), an emerging type of crystalline porous materials, are considered to be a potential solid conductor. [22,23] Depending on the topological establishment of building blocks, COFs are classified into 2D COFs and 3D COFs. Unless otherwise noted, the COFs in this review specifically refer to 2D COFs. 2D COFs typically crystallize as stacked sheets through the π-π interaction between adjacent monolayers, meanwhile the organic units are connected by the covalent bond to form reticular framework with periodic channel structure. [24][25][26][27] Based on the nature of synthetic reactions, COFs have been synthesized with boroxine, boronate ester, borosilicate, triazine, imine, hydrazone, borazine, imide, spiroborate, amide linkages, etc. [24,25] In addition, based on the symmetry of the monomers, COFs can be designed in various topologies, such as tetragonal, hexagonal, rhombic, and trigonal. [24,25] Over the recent decades, a variety of synthetic approaches have been developed to prepare COFs, such as solvothermal synthesis, microwave synthesis, ionothermal synthesis, mechanochemical synthesis, and interfacial synthesis. [24,25] Among them, the solvothermal synthesis under a sealed vessel with a suitable temperature can produce highly crystalline COFs, but this method always needs a long Ionic conduction plays a critical role in the process of electrode reactions and the charge transfer kinetics in a rechargeable battery. Covalent organic frameworks (COFs) have emerged as an exciting new class of ionic conductors, and have made great progress in terms of their application in rechargeable batteries. The unique features of COFs, such as well-defined directional channels, functional diversity, and structural robustness, endow COF-based conductors with a low ionic diffusion energy barrier and excellent t...

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“…However, the small pores and low chemical stabilities of zeolites greatly limit their broad application. Therefore, various new crystalline-like materials with larger pores have been developed [36][37][38][39] .…”

Section: Pore-engineered Nanoarchitectonics Basics 1: Classification ...mentioning

confidence: 99%

Pore-engineered nanoarchitectonics for cancer therapy

Sutrisno

Ariga

2023

NPG Asia Mater

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Nanoarchitectonics describes the integration of nanotechnology with other fields as a postnanotechnology concept that elevates it to material science. Based on this fundamental principle, we address pore-engineered nanoarchitectonics with application targets for cancer therapy by combining basic descriptions and exemplifying therapy applications in this review. The initial two sections briefly summarize pore-engineered nanoarchitectonics basics according to classification based on (i) material porosity and (ii) material composition. Afterward, the main application-oriented section—designing mesoporous material for cancer therapy—is presented. Various types of drug delivery systems, including mesoporous nanoparticles as nanocarriers, endogenous stimuli-responsive drug delivery, exogenous stimuli-responsive drug delivery, and targeted drug delivery, are described. Importantly, the clinical translation of mesoporous materials is further discussed. Mesoporous materials are unique nanoparticles that offer a network of cavities as vehicles for drug nanocarriers. Regarding the developments that allow mesoporous nanoparticles to be broadly used in clinical settings, there are several challenges that should be solved for their clinical application. From a clinical perspective, there are tremendous processes in the development of mesoporous materials.

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Supramolecular Reinforcement of a Large-Pore 2D Covalent Organic Framework

Cited by 26 publications

References 64 publications

Post-synthetic Transformation of Imine- into Nitrone-linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity

Post-synthetic Transformation of Imine- into Nitrone-linked Covalent Organic Frameworks for Atmospheric Water Harvesting at Decreased Humidity

Covalent Organic Framework for Rechargeable Batteries: Mechanisms and Properties of Ionic Conduction

Pore-engineered nanoarchitectonics for cancer therapy

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