Molecular Interactions and Layer Stacking Dictate Covalent Organic Framework Effective Pore Size

2021 ◽  
Author(s):  
Phuoc H. H. Duong ◽  
Yun Kyung Shin ◽  
Valerie A. Kuehl ◽  
Mohammad M. Afroz ◽  
John O. Hoberg ◽  
...  
Keyword(s):  
Pore Size ◽  
Molecular Interactions ◽  
Covalent Organic Framework ◽  
Layer Stacking ◽  
Effective Pore Size ◽  
Organic Framework

scholarly journals Tailored pore size and microporosity of covalent organic framework (COF) membranes for improved molecular separation

2021 ◽  
Vol 1 (2) ◽  
pp. 100008
Author(s):  
Digambar B. Shinde ◽  
Li Cao ◽  
Xiaowei Liu ◽  
Dinga A.D. Wonanke ◽  
Zongyao Zhou ◽  
...  
Keyword(s):  
Pore Size ◽  
Covalent Organic Framework ◽  
Molecular Separation ◽  
Organic Framework

Layer-Stacking-Driven Fluorescence in a Two-Dimensional Imine-Linked Covalent Organic Framework

2018 ◽  
Vol 140 (40) ◽  
pp. 12922-12929 ◽  
Author(s):  
Pablo Albacete ◽  
José I. Martínez ◽  
Xing Li ◽  
Alejandro López-Moreno ◽  
Sofı́a Mena-Hernando ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Covalent Organic Framework ◽  
Layer Stacking ◽  
Organic Framework

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.

scholarly journals A Novel One-Dimensional Porphyrin-Based Covalent Organic Framework

Molecules ◽  
2019 ◽  
Vol 24 (18) ◽  
pp. 3361
Author(s):  
Miao Zhang ◽  
Ruijin Zheng ◽  
Ying Ma ◽  
Ruiping Chen ◽  
Xun Sun ◽  
...  
Keyword(s):  
Pore Size ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Building Block ◽  
Co2 Adsorption ◽  
Bet Surface Area ◽  
One Dimensional ◽  
Covalent Organic Framework ◽  
Co2 Adsorption Capacity ◽  
Organic Framework

A novel one-dimensional covalent organic framework (COF-K) was firstly designed and synthesized through a Schiff-based reaction from a porphyrin building block and a nonlinear right-angle building block. The COF-K exhibited high BET surface area and narrow pore size of 1.25 nm and gave a CO2 adsorption capacity of 89 mg g−1 at 273K and 1bar.

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.

An azine-linked hexaphenylbenzene based covalent organic framework

2016 ◽  
Vol 52 (13) ◽  
pp. 2843-2845 ◽  
Author(s):  
Sampath B. Alahakoon ◽  
Christina M. Thompson ◽  
Amy X. Nguyen ◽  
Gino Occhialini ◽  
Gregory T. McCandless ◽  
...  
Keyword(s):  
Pore Size ◽  
Surface Area ◽  
Covalent Organic Framework ◽  
Aldehyde Groups ◽  
Organic Framework

We report an azine linked covalent organic framework based on hexaphenylbenzene monomer functionalized with aldehyde groups (“HEX-COF 1”, avg. pore size = 1 nm, surface area >1200 m2 g−1, sorption capability at 273 K, 1 atm = 20 wt% for CO2 and 2.3 wt% for CH4).

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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