A review of the sorbents based on covalent organic frameworks containing hybrids for extraction methods
Subject Areas :Mohammad Javad Aghajani 1 , Milad Ghani 2 , Jahan Bakhsh Raoof 3
1 - University of Mazandaran
2 -
3 -
Keywords: Covalent organic frameworks, functionalized covalent organic frameworks, sample preparation, solid phase microextraction, adsorbent,
Abstract :
Covalent organic frameworks have been used as a group of porous organic frameworks due to their remarkable intrinsic properties, such as high specific surface area and variable pore size as well as high stability. Also, they are flexible that by producing functional covalent organic frameworks or polystructures based on them, major changes in their physical and chemical properties can be made. In this article, several important groups of covalent organic frameworks are examined in terms of their design and manufacturing methods. Also, synergism of covalent organic frameworks with other materials, such as different types of magnetic nanoparticles, metal/metal oxide, silica, carbon nanomaterials, polymers, polyoxometalates and metal-organic frameworks are studied. Finally, recent applications of covalent organic frameworks as efficient adsorbents in sample preparation methods such as solid phase extraction, diffusion solid phase extraction, magnetic solid phase extraction and fibrous solid phase microextraction with emphasis on important factors that lead to increased efficiency It will be extracted and will be checked. Investigations have shown that hybrid formation of organic-covalent frameworks and other compounds, including polymers, can be effective in improving the performance of these compounds. It is important to note that an essential step during the synthesis of covalent organic frameworks is their design concept. The purpose of design is the specific orientation of covalent bonds between the functional groups of constituents (node and linker), types of bonds and types of topologies with pore sizes that require engineering. In addition, the challenges in these approaches will also be discussed.
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