Selective Molecular Sieving in Self-Standing Porous Covalent-Organic-Framework Membranes

2016 ◽  
Vol 29 (2) ◽  
pp. 1603945 ◽  
Author(s):  
Sharath Kandambeth ◽  
Bishnu P. Biswal ◽  
Harshal D. Chaudhari ◽  
Kanhu Charan Rout ◽  
Shebeeb Kunjattu H. ◽  
...  
Keyword(s):  
Covalent Organic Framework ◽  
Molecular Sieving ◽  
Organic Framework

A two-dimensional cationic covalent organic framework membrane for selective molecular sieving

2018 ◽  
Vol 6 (27) ◽  
pp. 13331-13339 ◽  
Author(s):  
Wenxiang Zhang ◽  
Liming Zhang ◽  
Haifeng Zhao ◽  
Bin Li ◽  
Heping Ma
Keyword(s):  
Two Dimensional ◽  
High Permeability ◽  
Covalent Organic Framework ◽  
Molecular Sieving ◽  
Organic Framework

A two-dimensional cationic covalent organic framework membrane with extraordinary separation properties and high permeability.

Ultrathin heterostructured covalent organic framework membranes with interfacial molecular sieving capacity for fast water-selective permeation

2020 ◽  
Vol 8 (37) ◽  
pp. 19328-19336
Author(s):  
Hao Yang ◽  
Hong Wu ◽  
Yumeng Zhao ◽  
Meidi Wang ◽  
Yimeng Song ◽  
...  
Keyword(s):  
Covalent Organic Framework ◽  
Interfacial Synthesis ◽  
Liquid Separations ◽  
Molecular Sieving ◽  
Organic Framework ◽  
Vapor Liquid

Ultrathin heterostructured covalent organic framework membranes were fabricated through vapor–liquid interfacial synthesis for efficient liquid separations.

scholarly journals Pore engineering of ultrathin covalent organic framework membranes for organic solvent nanofiltration and molecular sieving

2020 ◽  
Vol 11 (21) ◽  
pp. 5434-5440 ◽  
Author(s):  
Digambar B. Shinde ◽  
Li Cao ◽  
A. D. Dinga Wonanke ◽  
Xiang Li ◽  
Sushil Kumar ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Pore Size ◽  
Surface Engineering ◽  
Pore Surface ◽  
Alkyl Chains ◽  
Covalent Organic Framework ◽  
Organic Solvent Nanofiltration ◽  
Molecular Sieving ◽  
Organic Framework

Pore surface engineering of ultrathin COF membranes by introducing different lengths of alkyl chains into the skeleton, which allows us to precisely control the pore size of COF membranes for OSN applications and molecular sieving.

Tuning the pore structures and photocatalytic properties of a 2D covalent organic framework with multi-branched photoactive moieties

Nanoscale ◽  
2020 ◽  
Vol 12 (30) ◽  
pp. 16136-16142
Author(s):  
Xuan Wang ◽  
Ming-Jie Dong ◽  
Chuan-De Wu
Keyword(s):  
Photocatalytic Properties ◽  
Effective Strategy ◽  
Covalent Organic Framework ◽  
Highly Efficient ◽  
Pore Structures ◽  
Local Connection ◽  
Organic Framework

An effective strategy to incorporate accessible metalloporphyrin photoactive sites into 2D COFs by establishing a 3D local connection for highly efficient photocatalysis was developed.

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 18.1% single palladium atom catalysts on mesoporous covalent organic framework for gas phase hydrogenation of ethylene

2021 ◽  
Vol 2 (7) ◽  
pp. 100495
Author(s):  
Chun-Te Kuo ◽  
Yubing Lu ◽  
Pezhman Arab ◽  
K. Shamara Weeraratne ◽  
Hani El-Kaderi ◽  
...  
Keyword(s):  
Gas Phase ◽  
Palladium Atom ◽  
Covalent Organic Framework ◽  
Hydrogenation Of Ethylene ◽  
Organic Framework
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