Results 31 to 40 of about 40,447 (275)

Covalent Organic Frameworks for Photocatalysis. [PDF]

Adv Mater
AbstractThe global energy crisis and environmental concerns are driving research into renewable energy and sustainable energy conversion and storage technologies. Solar energy, as an ideal sustainable resource, has significant potential to contribute to the goal of net‐zero carbon emissions if effectively harnessed and converted into a reliable and ...
Mishra B, Alam A, Chakraborty A, Kumbhakar B, Ghosh S, Pachfule P, Thomas A.   +6 more
europepmc   +3 more sources

Chiral induction in covalent organic frameworks

Nature Communications, 2018
Controlling chirality and function in metal organic frameworks has been an achievement, but very difficult to carry out in covalent organic frameworks. Here the authors show chiral covalent organic frameworks that are crystallized from achiral precursors
Xing Han, Jie Zhang, Jinjing Huang, Xiaowei Wu, Daqiang Yuan, Yan Liu, Yong Cui   +6 more
doaj   +1 more source

Properties of Metal-Doped Covalent Organic Frameworks and Their Interactions with Sulfur Dioxide

Journal of Chemistry, 2018
Covalent organic frameworks are unique for their highly open architecture and attractive for use as promising gas adsorption and storage carriers. In this work, density functional theory calculations have been performed to investigate the properties of ...
Ju Wang, Jia Wang, Wenchang Zhuang, Xiaoqin Shi, Xihua Du   +4 more
doaj   +1 more source

Molecular Iodine Capture by Covalent Organic Frameworks

Molecules, 2022
The effective capture and storage of volatile molecular iodine from nuclear waste is of great significance. Covalent organic frameworks (COFs) are a class of extended crystalline porous polymers that possess unique architectures with high surface areas ...
Yuting Yang, Changzheng Tu, Hongju Yin, Jianjun Liu, Feixiang Cheng, Feng Luo   +5 more
doaj   +1 more source

Effect of building block transformation in covalent triazine‐based frameworks for enhanced CO2 uptake and metal‐free heterogeneous catalysis [PDF]

, 2020
Invited for the cover of this issue is the group of Pascal Van Der Voort at the University of Ghent and colleagues at Technische Universitat Berlin. The image depicts the covalent triazine frameworks reported in the manuscript for the sorption of CO2 and
Jena, Himanshu, Krishnaraj, Chidharth, Leus, Karen, Schmidt, Johannes, Van Der Voort, Pascal, Van Hecke, Kristof   +5 more
core   +2 more sources

Two-dimensional sp2 carbon–conjugated covalent organic frameworks [PDF]

, 2017
We synthesized a two-dimensional (2D) crystalline covalent organic framework (sp2c-COF) that was designed to be fully π-conjugated and constructed from all sp2-carbons by C=C condensation reactions of tetrakis(4-formylphenyl)pyrene and 1,4 ...
Addicoat, Matthew A, Asada, Mizue, Brady, Michael A, Chen, Qiuhong, Dalapati, Sasanka, Dalapati, Sasanka, Heine, Thomas, Jiang, Donglin, Jin, Enquan, Nakamura, Toshikazu, Xu, Hong, Xu, Qing   +11 more
core   +1 more source

Urea-Linked Covalent Organic Frameworks [PDF]

Journal of the American Chemical Society, 2018
2D covalent organic frameworks (COFs) with flexible urea linkages have been synthesized by condensation of 1,3,5-triformylphloroglucinol (TFP) with 1,4-phenylenediurea (BDU) or 1,1'-(3,3'-dimethyl-[1,1'-biphenyl]-4,4'-diyl)diurea (DMBDU). The resulting COF-117 and COF-118 undergo reversible structural dynamics within their layers, in response to ...
Chenfei Zhao, Christian S. Diercks, Chenhui Zhu, Nikita Hanikel, Xiaokun Pei, Omar M. Yaghi   +5 more
openaire   +3 more sources

Facilitating nitrogen accessibility to boron-rich covalent organic frameworks via electrochemical excitation for efficient nitrogen fixation

Nature Communications, 2019
Covalent organic frameworks are potential catalysts for nitrogen reduction, but limited nitrogen transport restricts the utilization ratio of active sites.
Sisi Liu, Mengfan Wang, Tao Qian, Haoqing Ji, Jie Liu, Chenglin Yan   +5 more
doaj   +1 more source

Three-Dimensional Phthalocyanine Metal-Catecholates for High Electrochemical Carbon Dioxide Reduction. [PDF]

, 2019
The synthesis of a new anionic 3D metal-catecholate framework, termed MOF-1992, is achieved by linking tetratopic cobalt phthalocyanin-2,3,9,10,16,17,23,24-octaol linkers with Fe3(-C2O2-)6(OH2)2 trimers into an extended framework of roc topology.
Diercks, Christian S, Gutierrez-Puebla, Enrique, Hanikel, Nikita, Kang, Joohoon, Matheu, Roc, Monge, M Ángeles, Pei, Xiaokun, Prévot, Mathieu S, Yaghi, Omar M, Yang, Peidong, Zhang, Bing   +10 more
core   +3 more sources

Covalent Organic Frameworks—Organic Chemistry Beyond the Molecule

Molecules, 2017
The synthesis of organic molecules has at its core, purity, definitiveness of structure, and the ability to access specific atoms through chemical reactions.
Christian S. Diercks, Markus J. Kalmutzki, Omar M. Yaghi   +2 more
doaj   +1 more source