Facile and large-scale synthesis of trifluoromethyl-grafted covalent organic framework for efficient microextraction and ultrasensitive determination of benzoylurea insecticides

Multifunctionalized Covalent Organic Frameworks for Broad-Spectrum Extraction and Ultrasensitive Analysis of Per- and Polyfluoroalkyl Substances

“…To prove the role of fluorine atoms in the enrichment of PFASs, fluoride-only adsorbent COF-(CF 3 ) 2 -based probes were also selected for comparison (Figure S7). The result showed that the EFs of COF-(CF 3 ) 2 ranged from 13.4 to 58.8 for the 14 PFASs. Obviously, the COF-NH-CO-F9 probe exhibited excellent extraction capacity with an EF of 66–160 for the 14 PFASs, which obtained the highest EFs among the six probes.…”

Monitoring Poly(methyl methacrylate) and Polyvinyl Dichloride Micro/Nanoplastics in Water by Direct Solid-Phase Microextraction Coupled to Gas Chromatography–Mass Spectrometry

“…N-SPCs SPME fibers were fabricated by adhering coating materials to stainless steel wire and sequent assembly into empty SPME needle as reported in the literature. − The N-SPCs sorbents were obtained by thermal treatment of shaddock peels in a tube furnace, according to our previous study . Typically, 10 g of shaddock peel powder was added into 100 mL of solution, which consisted of urea (3 g) and sodium hydroxide (10 g).…”

Supramolecular Materials as Solid-Phase Microextraction Coatings in Environmental Analysis

“…COFs as SPME coatings, prepared by physical adhesion, the sol–gel method, in situ growth, and chemical cross-linking, have recently attracted considerable attention for the analysis of organic pollutants, including polycyclic aromatic hydrocarbons [ 94 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 ], phenols [ 97 , 113 , 114 , 115 ], polybrominated diphenyl ethers [ 98 , 100 , 116 , 117 , 118 , 119 , 120 ], polyhalogenated biphenyls [ 99 , 121 , 122 ], pesticides [ 123 , 124 , 125 , 126 , 127 , 128 ], and PFASs [ 129 , 130 , 131 ] in environmental samples. The COF-based coatings used for the extraction of targeted compounds in environmental samples are summarized in Table 2 .…”

“…Trace detection of insecticides is another key issue for environmental monitoring due to their worldwide use, high stability, and high toxicity, resulting in a strong impact on the aquatic ecosystems [ 127 , 128 ]. Song et al developed an SPME coating based on a trifluoromethyl-grafted COF named COF-(CF 3 ) 2 for the extraction of benzoylurea insecticides from water samples [ 127 ].…”

“…Trace detection of insecticides is another key issue for environmental monitoring due to their worldwide use, high stability, and high toxicity, resulting in a strong impact on the aquatic ecosystems [ 127 , 128 ]. Song et al developed an SPME coating based on a trifluoromethyl-grafted COF named COF-(CF 3 ) 2 for the extraction of benzoylurea insecticides from water samples [ 127 ]. The COF scaffold was synthesized under solvothermal conditions using 2,5-Dibromoterephthaldehyde and 1,3,5-tris(4-aminophenyl) benzene, post-synthetically functionalized through the Suzuki–Miyaura cross-coupling reaction under mild condition and deposited onto SS wires using a silicone glue.…”