scholarly journals The Macroscopic Covalent Organic Framework Architectures for Water Remediation

2021 ◽  
Author(s):  
Abdul Khayum Mohammed ◽  
Dinesh Shetty
Keyword(s):  
Organic Molecules ◽  
Three Dimensional ◽  
Water Remediation ◽  
Porous Polymers ◽  
Covalent Organic Frameworks ◽  
Dynamic Covalent Chemistry ◽  
Covalent Organic Framework ◽  
Synthetic Strategy ◽  
Organic Framework

Covalent organic frameworks (COFs) are two- (2D) or three-dimensional (3D) crystalline and porous polymers constructed from organic molecules with various symmetries. The reticular synthetic strategy and the dynamic covalent chemistry...

Intrinsic proton conduction in 2D sulfonated covalent organic framework through the post-synthetic strategy

CrystEngComm ◽  
2021 ◽  
Author(s):  
Yuwei Zhang ◽  
Chunzhi Li ◽  
Zhaohan Liu ◽  
Yuze Yao ◽  
Md. Mahmudul Hasan ◽  
...  
Keyword(s):  
Proton Conduction ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Covalent Organic Framework ◽  
Synthetic Strategy ◽  
Organic Framework

Two-dimensional covalent organic frameworks (2D COFs) have attracted much attentions in proton conduction, owing to their regular pore channels and easy functionalization. However, most of COFs required the loading of...

A Three-Dimensional Tetraphenylethylene-Based Fluorescence Covalent Organic Framework for Molecular Recognition

2020 ◽  
Author(s):  
Junxia Ren ◽  
Yaozu Liu ◽  
Xin Zhu ◽  
Yangyang Pan ◽  
Yujie Wang ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Fluorescence Probe ◽  
Three Dimensional ◽  
Hazardous Substances ◽  
Covalent Organic Framework ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Polycyclic Aromatic ◽  
Better Than ◽  
Organic Framework

<p><a></a><a></a><a></a><a></a><a></a><a></a><a></a><a>The development of highly-sensitive recognition of </a><a></a><a></a><a></a><a></a><a>hazardous </a>chemicals, such as volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs), is of significant importance because of their widespread social concerns related to environment and human health. Here, we report a three-dimensional (3D) covalent organic framework (COF, termed JUC-555) bearing tetraphenylethylene (TPE) side chains as an aggregation-induced emission (AIE) fluorescence probe for sensitive molecular recognition.<a></a><a> </a>Due to the rotational restriction of TPE rotors in highly interpenetrated framework after inclusion of dimethylformamide (DMF), JUC-555 shows impressive AIE-based strong fluorescence. Meanwhile, owing to the large pore size (11.4 Å) and suitable intermolecular distance of aligned TPE (7.2 Å) in JUC-555, the obtained material demonstrates an excellent performance in the molecular recognition of hazardous chemicals, e.g., nitroaromatic explosives, PAHs, and even thiophene compounds, via a fluorescent quenching mechanism. The quenching constant (<i>K</i><sub>SV</sub>) is two orders of magnitude better than those of other fluorescence-based porous materials reported to date. This research thus opens 3D functionalized COFs as a promising identification tool for environmentally hazardous substances.</p>

scholarly journals In vivo oral insulin delivery via covalent organic frameworks

2021 ◽  
Author(s):  
Farah Benyettou ◽  
Nawel Kaddour ◽  
Thirumurugan Prakasam ◽  
Gobinda Das ◽  
Sudhir Kumar Sharma ◽  
...  
Keyword(s):  
Oral Delivery ◽  
Insulin Delivery ◽  
Oral Insulin ◽  
Covalent Organic Frameworks ◽  
Covalent Organic Framework ◽  
Organic Framework

We report the successful use of a gastro-resistant covalent organic framework for in vivo oral delivery of insulin.

Highly efficient CO2 capture by mixed matrix membranes containing three-dimensional covalent organic framework fillers

2019 ◽  
Vol 7 (9) ◽  
pp. 4549-4560 ◽  
Author(s):  
Youdong Cheng ◽  
Linzhi Zhai ◽  
Yunpan Ying ◽  
Yuxiang Wang ◽  
Guoliang Liu ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Three Dimensional ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Covalent Organic Framework ◽  
Highly Efficient ◽  
Organic Framework ◽  
Matrix Membranes

A three-dimensional covalent organic framework filler with size-selective pores has been proven effective in boosting the membrane CO2 capture performance.

scholarly journals Covalent organic framework based microspheres as an anode material for rechargeable sodium batteries

2018 ◽  
Vol 6 (34) ◽  
pp. 16655-16663 ◽  
Author(s):  
Bidhan Chandra Patra ◽  
Sabuj Kanti Das ◽  
Arnab Ghosh ◽  
Anish Raj K ◽  
Parikshit Moitra ◽  
...  
Keyword(s):  
Anode Material ◽  
Gas Adsorption ◽  
Optoelectronic Devices ◽  
Covalent Organic Frameworks ◽  
Covalent Organic Framework ◽  
Sodium Batteries ◽  
Organic Framework

Covalent organic frameworks (COFs) promise several benefits as materials in terms of gas adsorption, for use in optoelectronic devices, etc.

scholarly journals Multifunctional carbon nanotubes covalently coated with imine-based covalent organic frameworks: exploring structure–property relationships through nanomechanics

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 1128-1137 ◽  
Author(s):  
Alicia Moya ◽  
Mercedes Hernando-Pérez ◽  
Marta Pérez-Illana ◽  
Carmen San Martín ◽  
Julio Gómez-Herrero ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Synthesis ◽  
Covalent Organic Frameworks ◽  
Structure Property ◽  
One Pot ◽  
Covalent Organic Framework ◽  
Mwcnt Surface ◽  
Structure Property Relationships ◽  
First Time ◽  
Organic Framework

Hybridization of imine-based covalent organic framework (COF-300) on oxidized MWCNT surface have been designed and succesfully developed for the first time in one-pot chemical synthesis.

scholarly journals Constructing covalent organic frameworks in waterviadynamic covalent bonding

IUCrJ ◽  
2016 ◽  
Vol 3 (6) ◽  
pp. 402-407 ◽  
Author(s):  
Jayshri Thote ◽  
Harshitha Barike Aiyappa ◽  
Raya Rahul Kumar ◽  
Sharath Kandambeth ◽  
Bishnu P. Biswal ◽  
...  
Keyword(s):  
Schiff Base ◽  
Covalent Bonding ◽  
Porous Polymers ◽  
Porous Structures ◽  
Covalent Organic Frameworks ◽  
Synthetic Route ◽  
Dynamic Covalent Chemistry ◽  
Water Based ◽  
First Time ◽  
Reaction In Water

The formation of keto-enamine based crystalline, porous polymers in water is investigated for the first time. Facile access to the Schiff base reaction in water has been exploited to synthesize stable porous structures using the principles of Dynamic Covalent Chemistry (DCC). Most credibly, the water-based Covalent Organic Frameworks (COFs) possess chemical as well as physical properties such as crystallinity, surface area and porosity, which is comparable to their solvothermal counterparts. The formation of COFs in water is further investigated by understanding the nature of the monomers formed using hydroxy and non-hydroxy analogues of the aldehyde. This synthetic route paves a new way to synthesize COFs using a viable, greener route by utilization of the DCC principles in conjunction with the keto–enol tautomerism to synthesize useful, stable and porous COFs in water.

Dual luminescent covalent organic frameworks for nitro-explosive detection

2019 ◽  
Vol 7 (47) ◽  
pp. 27148-27155 ◽  
Author(s):  
Muhammad Faheem ◽  
Saba Aziz ◽  
Xiaofei Jing ◽  
Tingting Ma ◽  
Junyi Du ◽  
...  
Keyword(s):  
High Selectivity ◽  
High Sensitivity ◽  
Explosive Detection ◽  
Covalent Organic Frameworks ◽  
Covalent Organic Framework ◽  
Nitro Explosives ◽  
Organic Framework

The assembly of two electron-rich fluorescent monomers produces a new dual luminescent covalent organic framework (DL-COF), which exhibits nitro explosives detecting ability with high sensitivity (Ksv ∼ 106 M−1, Kq ∼ 1015 M−1 s−1) and high selectivity (at ppb level).

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