Results 251 to 260 of about 40,447 (275)

Covalent Organic Frameworks

2021
Covalent organic frameworks (COFs) are crystalline porous polymers featuring extended structures and ordered pores. They are constructed from molecular building units via covalent bonds. The diversity of building blocks with different geometric symmetry offers positional controllability and immense possibilities for the design of two- or three ...
Jie Li, Xin Huang, Chao Sun, Xiao Feng
openaire   +1 more source

Macrocycle‐Based Covalent Organic Frameworks

Advanced Materials, 2023
AbstractMacrocycles with well‐defined cavities and the ability to undergo supramolecular interactions are classical materials that have played an essential role in materials science. However, one of the most substantial barriers limiting the utilization of macrocycles is their aggregation, which blocks the active regions.
Yufei Yuan, Ki‐Taek Bang, Rui Wang, Yoonseob Kim   +3 more
openaire   +3 more sources

Fascinating isomeric covalent organic frameworks

Nanoscale, 2023
The design principles and structure–property relationship of isomeric covalent organic frameworks are summarized and recommended to accelerate their further development.
Xitong Ren, Xinyuan Wang, Wen Song, Feng Bai, Yusen Li   +4 more
openaire   +2 more sources

Toward Covalent Organic Framework Metastructures

Journal of the American Chemical Society, 2021
The bottom-up assembly of periodically ordered structures provides a scalable way for producing metastructured materials with exotic optical and mechanical properties. However, direct self-assembly of small molecules into such metastructures beyond the nanoscale remains an unresolved issue.
Song Wang, Yuhao Yang, Haoran Zhang, Ziyang Zhang, Chi Zhang, Xiaodong Huang, Daichi Kozawa, Pingwei Liu, Bo-Geng Li, Wen-Jun Wang   +9 more
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Landscaping Covalent Organic Framework Nanomorphologies

Journal of the American Chemical Society, 2022
The practical utilization of covalent organic frameworks (COFs) with manipulation at the atomic and molecular scale often demands their assembly on the nano-, meso-, and macroscale with precise control. Consequently, synthetic approaches that establish the ability to control the nucleation and growth of COF crystallites and their self-assembly to ...
Himadri Sekhar Sasmal, Ashok Kumar Mahato, Poulami Majumder, Rahul Banerjee   +3 more
openaire   +2 more sources

Metal–Covalent Organic Frameworks (MCOFs): A Bridge Between Metal–Organic Frameworks and Covalent Organic Frameworks

Angewandte Chemie, 2020
AbstractMany sophisticated chemical and physical properties of porous materials strongly rely on the presence of the metal ions within the structures. Whereas homogeneous distribution of metals is conveniently realized in metal–organic frameworks (MOFs), the limited stability potentially restricts their practical implementation.
Jinqiao Dong, Xing Han, Yan Liu, Haiyang Li, Yong Cui   +4 more
openaire   +2 more sources

Covalent Organic Frameworks in Separation

Annual Review of Chemical and Biomolecular Engineering, 2020
In the wake of sustainable development, materials research is going through a green revolution that is putting energy-efficient and environmentally friendly materials and methods in the limelight. In this quest for greener alternatives, covalent organic frameworks (COFs) have emerged as a new generation of designable crystalline porous polymers for a ...
Saikat, Das, Jie, Feng, Wei, Wang
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Crystalline Polyphenylene Covalent Organic Frameworks

Journal of the American Chemical Society, 2023
The synthesis of crystalline polyphenylene covalent organic frameworks (COFs) was accomplished by linking fluorinated tris(4-acetylphenyl)benzene building units using aldol cyclotrimerization. The structures of the two COFs, reported here, were confirmed by powder X-ray diffraction techniques, Fourier transform infrared, and solid-state 13C CP/MAS NMR ...
Xing Han, Zihui Zhou, Kaiyu Wang, Zhiling Zheng, S. Ephraim Neumann, Heyang Zhang, Tianqiong Ma, Omar M. Yaghi   +7 more
openaire   +2 more sources

Semiconducting Covalent Organic Frameworks

Chemical Reviews
Semiconductors form the foundational bedrock of modern electronics and numerous cutting-edge technologies. Particularly, semiconductors crafted from organic building blocks hold immense promise as next-generation pioneers, thanks to their vast array of chemical structures, customizable frontier orbital energy levels and bandgap structures, and easily ...
Donglin Jiang, Vincent Guan Wu Tan, Yifan Gong, Haipei Shao, Xinyu Mu, Zhangliang Luo, Shuyue He   +6 more
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Highly Emissive Covalent Organic Frameworks

Journal of the American Chemical Society, 2016
Highly luminescent covalent organic frameworks (COFs) are rarely achieved because of the aggregation-caused quenching (ACQ) of π-π stacked layers. Here, we report a general strategy to design highly emissive COFs by introducing an aggregation-induced emission (AIE) mechanism.
Sasanka Dalapati, Enquan Jin, Matthew Addicoat, Thomas Heine, Donglin Jiang   +4 more
openaire   +2 more sources