scholarly journals Transformation between 2D and 3D Covalent Organic Frameworks via Reversible [2 + 2] Cycloaddition

2020 ◽  
Vol 142 (19) ◽  
pp. 8862-8870 ◽  
Author(s):  
Thaksen Jadhav ◽  
Yuan Fang ◽  
Cheng-Hao Liu ◽  
Afshin Dadvand ◽  
Ehsan Hamzehpoor ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
2D And 3D

Covalent organic frameworks: an ideal platform for designing ordered materials and advanced applications

2021 ◽  
Author(s):  
Ruoyang Liu ◽  
Ke Tian Tan ◽  
Yifan Gong ◽  
Yongzhi Chen ◽  
Zhuoer Li ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
2D And 3D ◽  
Advanced Applications

Covalent organic frameworks offer a molecular platform for integrating organic units into periodically ordered yet extended 2D and 3D polymers to create topologically well-defined polygonal lattices and built-in discrete micropores and/or mesopores.

2D and 3D Porphyrinic Covalent Organic Frameworks: The Influence of Dimensionality on Functionality

2020 ◽  
Vol 59 (9) ◽  
pp. 3624-3629 ◽  
Author(s):  
Yi Meng ◽  
Yi Luo ◽  
Ji‐Long Shi ◽  
Huimin Ding ◽  
Xianjun Lang ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
2D And 3D

scholarly journals Transformation Between 2D and 3D Covalent Organic Frameworks via Reversible [2+2] Cycloaddition

2020 ◽  
Author(s):  
Thaksen Jadhav ◽  
Yuan Fang ◽  
Cheng-Hao Liu ◽  
Afshin Dadvand ◽  
Ehsan Hamzehpoor ◽  
...  
Keyword(s):  
Band Structure ◽  
Absorption Edge ◽  
Room Temperature ◽  
Three Dimensional ◽  
Cross Linking ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Doping Behavior ◽  
2D Polymers ◽  
2D And 3D

We report the first transformation between crystalline vinylene-linked two-dimensional (2D) polymers and crystalline cyclobutane-linked three-dimensional (3D) polymers. Specifically, absorption-edge irradiation of the 2D poly(arylenevinylene) covalent organic frameworks (COFs) results in topological [2+2] cycloaddition cross-linking the π-stacked layers in 3D COFs. The reaction is reversible and heating to 200°C leads to a cycloreversion while retaining the COF crystallinity. The resulting difference in connectivity is manifested in the change of mechanical and electronic properties, including exfoliation, blue-shifted UV-Vis absorption, altered luminescence, modified band structure and different acid-doping behavior. The Li-impregnated 2D and 3D COFs show a significant ion conductivity of 1.8×10<sup>−4</sup> S/cm and 3.5×10<sup>−5</sup> S/cm, respectively. Even higher room temperature proton conductivity of 1.7×10<sup>-2</sup> S/cm and 2.2×10<sup>-3</sup> S/cm was found for H<sub>2</sub>SO<sub>4</sub>-treated 2D and 3D COFs, respectively.

2D and 3D Porphyrinic Covalent Organic Frameworks: The Influence of Dimensionality on Functionality

2020 ◽  
Vol 132 (9) ◽  
pp. 3653-3658 ◽  
Author(s):  
Yi Meng ◽  
Yi Luo ◽  
Ji‐Long Shi ◽  
Huimin Ding ◽  
Xianjun Lang ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
2D And 3D

scholarly journals Reticular Chemistry: Molecular Precision in Infinite 2D and 3D

2019 ◽  
Vol 03 (01) ◽  
pp. 66-83 ◽  
Author(s):  
Omar M. Yaghi
Keyword(s):  
Chemical Stability ◽  
Carbon Capture ◽  
Metal Organic Frameworks ◽  
Water Harvesting ◽  
High Porosity ◽  
Covalent Organic Frameworks ◽  
3D Structures ◽  
Metal Organic ◽  
2D And 3D ◽  
Thermal And Chemical Stability

The long-standing dream of scientists to be able to link molecules together into crystalline, extended (infinite) 2D and 3D structures is now realized by the establishment of reticular chemistry through the discovery and development of metal-organic frameworks and covalent organic frameworks. The architectural, thermal, and chemical stability of such frameworks allowed study of their ultra-high porosity, reactivity and many applications including carbon capture and conversion to fuels, and water harvesting from desert air.

Syntheses of two- and three-dimensional covalent organic frameworks in deep eutectic solvents

2020 ◽  
Vol 22 (21) ◽  
pp. 7537-7542 ◽  
Author(s):  
Jikuan Qiu ◽  
Pengxin Guan ◽  
Yuling Zhao ◽  
Zhiyong Li ◽  
Huiyong Wang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Deep Eutectic Solvents ◽  
Covalent Organic Frameworks ◽  
Ambient Conditions ◽  
Green Strategy ◽  
2D And 3D ◽  
First Time

For the first time, a mild and green strategy is reported for the efficient syntheses of a series of 2D and 3D COFs using deep eutectic solvents as clean media under ambient conditions.

scholarly journals Transformation Between 2D and 3D Covalent Organic Frameworks via Reversible [2+2] Cycloaddition

2020 ◽  
Author(s):  
Thaksen Jadhav ◽  
Yuan Fang ◽  
Cheng-Hao Liu ◽  
Afshin Dadvand ◽  
Ehsan Hamzehpoor ◽  
...  
Keyword(s):  
Band Structure ◽  
Absorption Edge ◽  
Room Temperature ◽  
Three Dimensional ◽  
Cross Linking ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Doping Behavior ◽  
2D Polymers ◽  
2D And 3D

We report the first transformation between crystalline vinylene-linked two-dimensional (2D) polymers and crystalline cyclobutane-linked three-dimensional (3D) polymers. Specifically, absorption-edge irradiation of the 2D poly(arylenevinylene) covalent organic frameworks (COFs) results in topological [2+2] cycloaddition cross-linking the π-stacked layers in 3D COFs. The reaction is reversible and heating to 200°C leads to a cycloreversion while retaining the COF crystallinity. The resulting difference in connectivity is manifested in the change of mechanical and electronic properties, including exfoliation, blue-shifted UV-Vis absorption, altered luminescence, modified band structure and different acid-doping behavior. The Li-impregnated 2D and 3D COFs show a significant ion conductivity of 1.8×10<sup>−4</sup> S/cm and 3.5×10<sup>−5</sup> S/cm, respectively. Even higher room temperature proton conductivity of 1.7×10<sup>-2</sup> S/cm and 2.2×10<sup>-3</sup> S/cm was found for H<sub>2</sub>SO<sub>4</sub>-treated 2D and 3D COFs, respectively.

scholarly journals In Silico Design of 2D and 3D Covalent Organic Frameworks for Methane Storage Applications

2018 ◽  
Vol 30 (15) ◽  
pp. 5069-5086 ◽  
Author(s):  
Rocío Mercado ◽  
Rueih-Sheng Fu ◽  
Aliaksandr V. Yakutovich ◽  
Leopold Talirz ◽  
Maciej Haranczyk ◽  
...  
Keyword(s):  
In Silico ◽  
Methane Storage ◽  
Covalent Organic Frameworks ◽  
In Silico Design ◽  
2D And 3D
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