Results 251 to 260 of about 17,281 (293)

An Azine-Linked Covalent Organic Framework

Journal of the American Chemical Society, 2013
Condensation of hydrazine with 1,3,6,8-tetrakis(4-formylphenyl)pyrene under solvothermal conditions yields highly crystalline two-dimensional covalent organic frameworks. The pyrene units occupy the vertices and the diazabutadiene (-C═N-N═C-) linkers locate the edges of rohmbic-shaped polygon sheets, which further stack in an AA-stacking mode to ...
Sasanka, Dalapati, Shangbin, Jin, Jia, Gao, Yanhong, Xu, Atsushi, Nagai, Donglin, Jiang   +5 more
openaire   +2 more sources

Constructing Photocatalytic Covalent Organic Frameworks with Aliphatic Linkers.

Journal of the American Chemical Society
Photocatalytic covalent organic frameworks (COFs) are typically constructed with rigid aromatic linkers for crystallinity and extended π-conjugation. However, the essential hydrophobicity of the aromatic backbone can limit their performances in water ...
Tingbao Xu, Zhiqiang Wang, Weiwei Zhang, Shuhao An, Lei Wei, Shaomeng Guo, Yanlin Huang, Shan Jiang, Minghui Zhu, Yuebiao Zhang, Wei‐Hong Zhu   +10 more
semanticscholar   +1 more source

2D/2D Hydrogen-Bonded Organic Frameworks/Covalent Organic Frameworks S-scheme Heterojunctions for Photocatalytic Hydrogen Evolution.

Angewandte Chemie
Hydrogen-bonded organic frameworks (HOFs)  demonstrate significant potential for application in photocatalysis. However, the low efficiency of electron-hole separation and limited stability inhibit their practical utilization in photocatalytic hydrogen ...
Ruiqin Gao, Rongchen Shen, Can Huang, Kaihui Huang, Guijie Liang, Peng Zhang, Xin Li   +6 more
semanticscholar   +1 more source

Nanoscale covalent organic frameworks for enhanced photocatalytic hydrogen production

Nature Communications
Nanosizing confers unique functions in materials such as graphene and quantum dots. Here, we present two nanoscale-covalent organic frameworks (nano-COFs) that exhibit exceptionally high activity for photocatalytic hydrogen production that results from ...
Wei Zhao, Liang Luo, Muyu Cong, Xueyan Liu, Zhiyun Zhang, M. Bahri, Boyu Li, Jing Yang, Miaojie Yu, Lunjie Liu, Yu Xia, Nigel D. Browning, Wei‐Hong Zhu, Weiwei Zhang, Andrew I. Cooper   +14 more
semanticscholar   +1 more source

The Promise and Potential of Metal-Organic Frameworks and Covalent Organic Frameworks in Vaccine Nanotechnology.

Chemical Reviews
The immune system's complexity and ongoing evolutionary struggle against deleterious pathogens underscore the value of vaccination technologies, which have been bolstering human immunity for over two centuries.
Y. Wijesundara, Thomas S. Howlett, Sneha Kumari, J. Gassensmith   +3 more
semanticscholar   +1 more source

Hydrazone-Linked Covalent Organic Frameworks.

Angewandte Chemie
Hydrazone-linked covalent organic frameworks (COFs) with structural flexibility, heteroatomic sites, post-modification ability and high hydrolytic stability have attracted great attention from scientific community. Hydrazone-linked COFs, as a subclass of
Huifen Zhuang, Can Guo, Jianlin Huang, Liwen Wang, Zixi Zheng, Hai-Ning Wang, Yifa Chen, Ya-Qian Lan   +7 more
semanticscholar   +1 more source

Covalent organic frameworks

2018
Covalent organic frameworks (COFs) are a new and emerging class of porous and crystalline materials that are formed via the connection of organic subunits through covalent bonds. Their great structural flexibility allows for the realisation of COFs based on a modular principle, where the respective building blocks can be hand-picked and designed ...
openaire   +1 more source

The propensity for covalent organic frameworks to template polymer entanglement

Science
The introduction of molecularly woven three-dimensional (3D) covalent organic framework (COF) crystals into polymers of varying types invokes different forms of contact between filler and polymer.
S. E. Neumann, Junpyo Kwon, Cornelius Gropp, Le Ma, R. Giovine, Tianqiong Ma, Nikita Hanikel, Kaiyu Wang, Tiffany Chen, Shaan Jagani, R. Ritchie, Ting Xu, O. Yaghi   +12 more
semanticscholar   +1 more source

Multivariate Flexible Metal–Organic Frameworks and Covalent Organic Frameworks

Small
Abstract Precise control of the void environment, achieved through multiple functional groups and enhanced by structural adaptations to guest molecules, stands at the forefront of scientific inquiry. Flexible multivariate open framework materials (OFMs), including covalent organic frameworks and metal–organic frameworks, meet these ...
Szymon K Sobczak, Joanna Drwęska, Wiktoria Gromelska, Kornel Roztocki, Agnieszka M Janiak   +4 more
openaire   +2 more sources

Covalent organic frameworks in tribology - A perspective

Advances in Colloid and Interface Science
Two-dimensional covalent organic frameworks (2D COFs) are an emerging class of crystalline porous materials formed through covalent bonds between organic building blocks. COFs uniquely combine a large surface area, an excellent stability, numerous abundant active sites, and tunable functionalities, thus making them highly attractive for numerous ...
Isadora, Berlanga, Andreas, Rosenkranz
openaire   +2 more sources