基于低共熔溶剂的多孔有机框架材料合成及其在固相萃取中的应用

Synthesis of porous organic framework materials based on deep eutectic solvents and their application in solid-phase extraction

本文综述了低共熔溶剂(DES)在多孔有机框架材料(POFs)中金属有机框架(MOFs)和共价有机框架(COFs)合成方面的应用,以及这些新型材料在固相萃取领域的潜在应用。DES作为环保绿色溶剂,不仅用于MOFs和COFs的制备,还在特定情况下作为结构导向剂,对框架的结构和性能产生重要影响。通过合适的DES配方,研究人员能够调控MOFs和COFs的晶体结构、孔径和表面性质,从而获得性能卓越的材料。MOFs和COFs因其具有较大的比表面积和丰富的活性位点,在固相萃取中展现出卓越的吸附能力和选择性,能够有效地从复杂样品中富集目标分析物。研究证明,基于DES的MOFs和COFs在环境分析、食品检测和生物样品分析等领域具有广泛的应用潜力。尽管基于DES的MOFs和COFs在固相萃取领域仍处于初级阶段,但其高效富集和高选择性等特性为实际应用提供了良好前景。未来的研究应继续深入探索基于DES的合成方法,以制备更多性能卓越的MOFs和COFs,并深入研究其在各个领域的应用潜力。这些努力有望将这些新型材料应用于商业化的固相萃取方法中,为分析化学领域带来新的发展机遇。

This paper reviews the application of deep eutectic solvents(DESs)in the synthesis of metal-organic frameworks(MOFs)and covalent organic frameworks(COFs)as well as their prospects in the field of solid-phase extraction(SPE).Porous organic frameworks(POFs)have unique properties such as a large specific surface area,high porosity,and easy modification.Thus,these materials are widely applied in the fields of catalysis,adsorption,drug delivery,gas storage,and separation.POFs include MOFs,COFs,conjugated microporous polymers(CMPs),porous aromatic frameworks(PAFs),and covalent triazine frameworks(CTFs).MOFs are constructed from metal ions/clusters and organic ligands through coordination bonds and can be extended in two or three dimensions by repeated coordination with potential voids.COFs are formed from two monomers containing light elements(such as carbon,hydrogen,oxygen,nitrogen,boron,and other elements)via coordination bonds and have large two-or three-dimensional structures.However,conventional POF synthesis methods generally suffer from disadvantages such as long synthesis times,high temperature and pressure requirements,and the use of toxic and hazardous reaction solvents.DES consists of a hydrogen bond acceptor(HBA)and a hydrogen bond donor(HBD)bound by hydrogen-bonding interactions.It is a promising green solvent for material synthesis owing to its low vapor pressure,high stability,and ease of preparation.DES can be used to prepare MOFs and COFs and,in specific cases,acts as a structure-directing agent,which has an important impact on the structure and properties of the resulting frameworks.Using appropriate DES formulations,researchers can modulate the crystal structures,pore sizes,and surface properties of MOFs and COFs,resulting in materials with excellent characteristics.SPE is an analytical technique in which a sample solution is added to an SPE column;the sample solution is forced through the stationary phase,and the target compounds are collected for analysis by elution with an organic solvent.Therefore,suitable stationary-phase materials are critical for SPE.Owing to their large specific surface areas and abundant active sites,MOFs and COFs exhibit outstanding adsorption capacity and selectivity in SPE and can effectively enrich target analytes from complex samples.DES-based MOFs and COFs have shown potential use in a wide range of applications,such as in environmental analysis,food testing,and biological sample analysis.Although DES-based MOFs and COFs for SPE are still in the early stages of development,their properties such as efficient enrichment and high selectivity offer good prospects for practical applications.Future research should continue to explore DES-based synthesis methods in depth to prepare other MOFs and COFs with the desired properties and investigate their potential applications in various fields.These efforts are expected to apply these novel materials in commercialized solid-phase extraction methods,bringing new development opportunities in the field of analytical chemistry.