Covalent‐Organic Framework Composites: A Review Report on Synthesis Methods

Abstract

Nowadays, Covalent-Organic Frameworks (COFs) are deemed to be the utmost trending and leading materials worldwide, counting on their highly porous nature and phenomenal thermodynamic stability. Owing to a highly ordered organic network having diverse strong covalent linkages, these materials have elucidated their suitability in photoelectricity, drug delivery, semiconductors, gas storage and separation, emission, proton conduction, catalysis, etc. To add on the functionality, these materials are been coupled with other functional materials to amalgamate COFs composites. Such COFs composites offer countless opportunities for valuable applications. Herein, in this review we report and underpin the existing synthesis methods for COFs and their composites along with their analytical applications in various fields with special reference to separation and sensing. A conclusive discussion on their future perspectives and challenges is made to benefit the readers.

Recent Progress in the Development of MOF-Based Photocatalysts for the Photoreduction of Cr(VI)

“…Covalent organic frameworks (COF) are a class of polymers that employ reticular chemistry in their syntheses . They are designed via covalent linkages of organic building blocks in well-defined manners. , There are different methods in the synthesis of COFs such as solvothermal, ionothermal, microwave-assisted, mechanochemical, and interfacial synthesis . Their ordered skeletons and crystalline features offer a number of unique characteristics such as permanent porosity, well-defined channels, and high electron conductivity (via π-conjugated frameworks) .…”

“…163,164 There are different methods in the synthesis of COFs such as solvothermal, ionothermal, microwave-assisted, mechanochemical, and interfacial synthesis. 165 Their ordered skeletons and crystalline features offer a number of unique characteristics such as permanent porosity, well-defined channels, and high electron conductivity (via π-conjugated frameworks). 166 They are commonly employed in energy storage (ion batteries and supercapacitors), 167,168 fuel cell (proton conductivity), 169 CO 2 electroreduction, 170 lightinduced organic transformations, 171 and photodriven H 2 evolution 172 applications.…”

Amorphous tetrazine–triazine-functionalized covalent organic framework for adsorption and removal of dyes

“…Due to their intriguing, well-defined topologies, variable pore functionality, and high chemical stability, COFs have established themselves as a significant class of porous materials. [26][27][28][29][30] To attain the intended functionality, their chemical structures can also be modelled, modified, and altered through organic synthesis. [31][32][33][34][35][36] COFs can be crystalline or amorphous polymers with uniform and irregular nanopores.…”

Application of fully conjugated covalent organic frameworks in photocatalytic carbon dioxide reduction performance

“…The triazine units are planar and fully conjugated, which is suitable for facilitating π-electron communication without creating meta-positions in the benzene ring to hinder conjugation effects. [34][35][36][37][38] At the same time, its multiple pyridine nitrogen atoms can provide abundant active sites in some catalytic processes. They possess high nitrogen functionality, high chemical and thermal stability, and large structural diversity.…”