Abstract
Porous organic frameworks (POFs), a general term for covalent‐organic frameworks (COFs), covalent triazine frameworks (CTFs), porous aromatic frameworks (PAFs), etc., are constructed from organic building monomers with strong covalent bonds and have generated great interest among researchers. The remarkable features, such as large surface areas, permanent porosity, high thermal and chemical stability, and convenient functionalization, promote the great potential of POFs in diverse applications. A critical overview of the important development in the design and synthesis of COFs, CTFs, and PAFs is provided and their state‐of‐the‐art applications in analytical chemistry are discussed. POFs and their functional composites have been explored as advanced materials in “turn‐off” or “turn‐on” fluorescence detection and novel stationary phases for chromatographic separation, as well as a promising adsorbent for sample preparation methods. In addition, the prospects for the synthesis and utilization of POFs in analytical chemistry are also presented. These prospects can offer an outlook and reference for further study of the applications of POFs.
Highlights
Porous organic frameworks (POFs), a general term for covalent-organic numerous scientific fields.[1]
On the microscale and nanoscale, the design, construction, and through the assembly of organic building blocks into predictutilization of advanced porous materials with specific architec- able, periodic, 2D or 3D frameworks.[2e–g] covalent triazine frameworks (CTFs), a distinctive tures and prominent features has been a topic of research in subclass of covalent-organic frameworks (COFs), are constructed through the cyclotrimerization
The recent developments of COFs, CTFs, and PAFs in analytical chemistry are reviewed here, and the applications of these porous materials in fluorescence detection and sample preparation techniques are summarized in Tables 1 and 2, respectively
Summary
New discoveries in material science always provide innovative and powerful tools for analytical chemistry. The fluorescence detection of diverse analytes, novel stationary phases for chromatography, and new absorbents for sample preparation methods. The recent developments of COFs, CTFs, and PAFs in analytical chemistry are reviewed here, and the applications of these porous materials in fluorescence detection and sample preparation techniques are summarized in Tables 1 and 2, respectively. The hybrid composites of POFs@silica gel, such as CTF-1@SiO2, COF-TpBd@SiO2, and BtaMthCOF@SiO2, were constructed for HPLC separation of various analytes of interest. Other POFs, such as COF-TpBd, COF-LZU1, and PAF-1-NH2/IL, have been covalently bonded with the accessory reagents onto the capillary or fiber substrate for use as new stationary phases for GC, CEC, or fiber coatings for SPME. COFs, CTFs, and PAFs, together with their composites, exhibit tremendous application potential in analytical chemistry
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