High-Crystallinity Covalent Organic Framework Synthesized in Deep Eutectic Solvent: Potentially Effective Adsorbents Alternative to Macroporous Resin for Flavonoids

2021 ◽  
Author(s):  
Manjie Gao ◽  
Dandan Wang ◽  
Linlin Deng ◽  
Shaochi Liu ◽  
Kailian Zhang ◽  
...  
Keyword(s):  
Deep Eutectic Solvent ◽  
Macroporous Resin ◽  
High Crystallinity ◽  
Covalent Organic Framework ◽  
Organic Framework

Covalent organic framework as photocatalyst for window ledge cross-dehydrogenative coupling reactions

2022 ◽  
Author(s):  
Yu-Bin Dong ◽  
Fan Yang ◽  
Cong-Cong Li ◽  
Cui-Cui Xu ◽  
Jing-Lan Kan ◽  
...  
Keyword(s):  
Light Harvesting ◽  
Coupling Reactions ◽  
Strong Light ◽  
High Crystallinity ◽  
Covalent Organic Framework ◽  
Dehydrogenative Coupling ◽  
Highly Effective ◽  
Donor Acceptor ◽  
Organic Framework

A benzothiadiazole-involved donor-acceptor (D-A) covalent organic framework (COF), which possesses high crystallinity and strong light-harvesting capability (ranging from 300 to 800 nm), can serve as a highly effective photocatalyst for...

Covalent organic frameworks as pH responsive signaling scaffolds

2016 ◽  
Vol 52 (74) ◽  
pp. 11088-11091 ◽  
Author(s):  
Yuwei Zhang ◽  
Xiaochen Shen ◽  
Xiao Feng ◽  
Hong Xia ◽  
Ying Mu ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Ph Sensor ◽  
Luminescence Properties ◽  
Covalent Organic Frameworks ◽  
Ph Responsive ◽  
High Crystallinity ◽  
Covalent Organic Framework ◽  
Organic Framework

A β-ketoenamine based covalent organic framework possesses high crystallinity, good porosity, stability and luminescence properties. It can serve as the first COF-based fluorescent pH sensor in aqueous solutions.

A novel azobenzene covalent organic framework

CrystEngComm ◽  
2014 ◽  
Vol 16 (29) ◽  
pp. 6547-6551 ◽  
Author(s):  
Jian Zhang ◽  
Laibing Wang ◽  
Na Li ◽  
Jiangfei Liu ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Pore Size ◽  
High Crystallinity ◽  
Covalent Organic Framework ◽  
Organic Framework

The first example of a novel Azo-linked 2D COF with a hexagonal skeleton, high crystallinity and permanent porosity. The trans-to-cis photoisomerization can lead to the decline of Azo-COF crystallinity but cannot impact the pore size of Azo-COF. The current results will provide a strategy for designing smart COF materials.

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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