Recent developments in the application of covalent triazine framework-based sorbents for analytical sample preparation

Covalent Triazine Frameworks (CTFs) have garnered considerable attention due to their distinctive structural characteristics, including a nitrogen-rich composition, fully conjugated framework, chemical stability, customizable pore size, expansive surface area, and exceptional porosity. These inherent properties render CTFs highly appealing for a wide range of applications, particularly in analytical sample preparation techniques. Triazinebased adsorbents exhibit commendable selectivity and sensitivity when it comes to various analytes, owing to a multitude of mechanisms such as electrostatic forces, both hydrophobic and hydrophilic effects, pi-pi interactions, and hydrogen bonding. This review aims to present recent advancements in CTF preparation, with a primary focus on their applications in analytical sample preparation. To enhance comprehension of CTFs as sorbents, a comprehensive survey, and analysis of their recent applications in various adsorption-based extraction techniques, design strategies, and synthetic routes have been provided. Furthermore, we illuminate the difficulties and potential in this area, aiming to discover innovative approaches to address challenges in analytical sample preparation.