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).

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.

Facile room-temperature solution-phase synthesis of a spherical covalent organic framework for high-resolution chromatographic separation

2015 ◽  
Vol 51 (61) ◽  
pp. 12254-12257 ◽  
Author(s):  
Cheng-Xiong Yang ◽  
Chang Liu ◽  
Yi-Meng Cao ◽  
Xiu-Ping Yan
Keyword(s):  
High Resolution ◽  
Surface Area ◽  
Chromatographic Separation ◽  
Room Temperature ◽  
Solution Phase ◽  
Phase Synthesis ◽  
Covalent Organic Framework ◽  
Solution Phase Synthesis ◽  
Temperature Solution ◽  
Organic Framework

Facile room-temperature solution-phase synthesis of a spherical covalent organic framework with large surface area and good stability for high-resolution chromatographic separation.

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

Parametric Influence on the Physical Characterizations of Covalent Organic Framework-1

2014 ◽  
Vol 625 ◽  
pp. 24-28
Author(s):  
Muhammad Falaq Muhammad Faisal ◽  
Ahmad Rafizan Mohamad Daud ◽  
Kamariah Noor Ismail
Keyword(s):  
Electron Microscopy ◽  
Surface Area ◽  
Crystalline Structure ◽  
Bet Surface Area ◽  
Heating Condition ◽  
Covalent Organic Framework ◽  
A Value ◽  
Increasing Trend ◽  
Scanning Electron ◽  
Organic Framework

Four samples of covalent organic framework-1 (COF-1) assigned as S1 to S4 were prepared by varying the initial mass of 1,4-benzene diboronic acid (BDBA) used and heating condition. The samples were physically characterized using Brunauer–Emmett–Teller (BET) surface area analysis and FESEM analysis. The BET surface area value showed an increasing trend with increasing mass of BDBA used. The highest achievable BET surface area is recorded by COF-1 (S3) with a value of 107.9 m2/g. The low surface area obtained is likely due to the distribution of particles with large pore sizes. This is confirmed by the Field Emission Scanning Electron Microscopy (FESEM) images which correlate well with the surface area obtained. The presence of dendrites phase within the COF-1 structure also indicates incomplete formation of a crystalline structure, hence contributed to the low surface area achieved. It was also found that the use of ramping heating did not significantly influence the formation of COF-1 crystalline structure which promotes the surface area.

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.

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.

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