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      • Open Access Article

        1 - A review of the sorbents based on covalent organic frameworks containing hybrids for extraction methods
        Mohammad Javad Aghajani Milad Ghani Jahan Bakhsh Raoof
        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 cov More
        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. Manuscript profile
      • Open Access Article

        2 - MOFCOF composites a review of synthesis methods and applications
        Milad Ghani Marziyeh Kavian
        In the past decades, porous materials have attracted a lot of attention in physics, chemistry and materials science. Among various compounds, metal-organic frameworks (Metal organic frameworks, MOFs) and covalent organic frameworks (COFs), as crystalline porous material More
        In the past decades, porous materials have attracted a lot of attention in physics, chemistry and materials science. Among various compounds, metal-organic frameworks (Metal organic frameworks, MOFs) and covalent organic frameworks (COFs), as crystalline porous materials, were developed at a very high speed. MOFs are a subgroup of porous compounds in which organic ligands are connected together with metal cations. COFs are two- or three-dimensional organic solids with extended structures in which the building blocks are connected by strong covalent bonds. These compounds have unique advantages including well-defined and tunable structures, large surface area, high porosity, and ease of framework modification, which make them ideal host substrates for various guests including polymers, metal oxide nanoparticles, and semiconductors to create Converts MOF or COF-based multistructures. Compared to single-component compounds, polycomposites always show new properties due to their synergistic effects. Therefore, to further improve their performance and expand their applications, many efforts have been made to design and fabricate various MOF or COF-based multi-structures. Therefore, in this study, the integration of MOFs and COFs, their manufacturing methods, and the applications of these multiple structures will be investigated. Moreover, the capability of the prepared sorbents in various fields such as sorbent, catalysis and other format will be discussed. Metal–organic frameworks (MOFs) are a class of compounds consisting of metal clusters (also known as SBUs) coordinated to organic ligands to form one-, two-, or three-dimensional structures. Manuscript profile