Chemical Sensors Based on Covalent Organic Frameworks

Covalent organic frameworks (COFs) are a type of crystalline porous polymer composed of light elements through strong covalent bonds. COFs have attracted considerable attention due to their unique designable structures and excellent material properties. Currently, COFs have shown outstanding potential in various fields, including gas storage, pollutant removal, catalysis, adsorption, optoelectronics, and their research in the sensing field is also increasingly flourishing. In this review, we focus on COF-based sensors. Firstly, we elucidate the fundamental principles of COF-based sensors. Then, we present the primary application areas of COF-based sensors and their recent advancements, encompassing gas, ions, organic compounds, and biomolecules sensing. Finally, we discuss the future trends and challenges faced by COF-based sensors, outlining their promising prospects in the field of sensing. Owing to the advantages of high surface area, tenable polygonal porosity, predictable and stable structure, and precise chemical control, covalent organic frameworks offer numerous potential in addressing the crucial points for sensing application. Here, we systematically review recent chemical sensors based on covalent organic frameworks.+image

Automated summary

Covalent organic frameworks (COFs) are crystalline porous polymers composed of light elements through strong covalent bonds. They have unique designable structures and excellent material properties, making them highly promising for various applications. This review focuses on COF-based sensors, discussing their fundamental principles, primary application areas, recent advancements, and future trends and challenges in sensing. COFs offer numerous potential in addressing crucial points for sensing application, thanks to their high surface area, tunable polygonal porosity, predictable and stable structure, and precise chemical control.