A trifluoromethyl-grafted ultra-stable fluorescent covalent organic framework for adsorption and detection of pesticides

Zhao, Yuxiang; Sui, Zhuyin; Chang, Zhaosen; Wang, Shunli; Liang, Ying; Liu, Xin; Feng, Lijuan; Chen, Qi; Wang, Ning

doi:10.1039/d0ta07708a

Cited by 91 publications

(45 citation statements)

References 61 publications

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“…COF−Ph was obtained according to previous work [3b] and characterized as shown in the Supporting Information. Cobalt complex of COF−Ph was used to contrast with counterpart of COF‐Pyr in order to explore the active sites of electrocatalysts.…”

Section: Resultsmentioning

confidence: 99%

“…The data shown in the N 1s X‐ray photoelectron spectroscopy (XPS) spectra were consistent with these conclusions. In Figure S5, the N 1s XPS peak of COF‐Pyr was apparently broader than that of TPB‐DMTP‐COF; the spectra of COF‐Pyr showed three peaks at 399.8, 399.5, and 400.4 eV, representing imine, [13] quinoline, [3b] and pyrimidine, respectively. It was shown that imine bonds were partially converted to quinoline units via the Povarov reaction, and the pyrimidine functional groups were successfully introduced.…”

Section: Resultsmentioning

confidence: 99%

“…Unfortunately, the imine bond is reversible, which makes them easy to hydrolyze in acid and base solutions, causing their original structure to be destroyed. Different methods have been used to improve the stability of COFs, [11] such as modifying hydrophobic groups on COFs, [3b] reducing imine bonds to irreversible carbon–nitrogen single bonds, [12] or converting reversible imine bonds to irreversible quinoline units [13] . Among them, the addition of imine bond and electron‐rich alkyne group via Povarov reaction can not only improve the stability but also introduce new functional groups [14] .…”

Section: Introductionmentioning

confidence: 99%

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Pyrimidine‐Functionalized Covalent Organic Framework and its Cobalt Complex as an Efficient Electrocatalyst for Oxygen Evolution Reaction

et al. 2021

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A pyrimidine‐modified covalent organic framework (COF‐Pyr) was designed to be synthesized via the Povarov reaction. The nitrogen atom on the pyrimidine showed excellent coordination ability to metal ions. Their stable metal composite material (Co@COF‐Pyr) exhibited remarkable performance for electrocatalytic oxygen evolution reaction (OER) in 1.0 m KOH aqueous solution. The overpotential was 450 mV at 10 mA cm−2. The Co@COF‐Pyr with large specific surface area (392 m2 g−1) and regular crystal structure provided free passage for H2O to move and make them fully contact with the uniformly dispersed cobalt ions on the surface. Thus, the turnover frequency of Co@COF‐Pyr was 0.1 s−1 at the overpotential of 370 mV, which was higher than most reported OER catalysts. This work provided a new way to design and prepare nitrogen‐containing heterocyclic functionalized COFs. They can be combined with metal ions to expand the application of COFs in the field of electrocatalysis.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pyrimidine‐Functionalized Covalent Organic Framework and its Cobalt Complex as an Efficient Electrocatalyst for Oxygen Evolution Reaction

et al. 2021

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“…[19,101] COFs and MOFs are materials with interesting properties and aspects such as their porosity, possibility of modification, regulated functionalization, and designable topologies. [19,[99][100][101] In literature, there are reported investigations where they use magnetic nanocomposites, Fe3@SiO 2 @UiO-67 and MOF-Fe 4 O 3 -GO-β-cyclodextrin, for the removal of glyphosate, timethoxan, imidacloprid, acetamiprid, dinotefuran, clothianidin, and nitenpyram from aqueous systems. [102,103] Wang et al ( 2020) reported the utilization of ZIF-8@MWCT for adsorption of inorganic pesticides from contaminated waters.…”

Section: Nanostructured Bio-polymeric Hybrid Materials Used In Aqueous Pesticide Removalmentioning

confidence: 99%

Biopolymer‐Nanocomposite Hybrid Materials as Potential Strategy to Remove Pesticides in Water: Occurrence and Perspectives

Baigorria

Fraceto

2021

Advanced Sustainable Systems

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Nations (FAO) estimates that approximately 40% of food crops are lost each year to plant pests and diseases. [2] These losses result in a shortfall in crop yields for sufficient food production, causing significant economic consequences. [1,2] Over the years, various anthropogenic activities, together with climate change, have led to alterations in ecosystems that cause considerable damage in areas such as agriculture. The reduction in biodiversity and the creation of new niches are some of these effects that allow, among other things, the rapid spread of pests. [1,2] Therefore, plant protection in agricultural crops is crucial for avoiding the impacts caused by devastating pests and diseases.Agricultural activities face the dual challenges of, on the one hand, becoming more productive and, on the other hand, reducing their impacts on the environment as much as possible. In the case of the former, the use of chemical products such as pesticides is often essential for the control of crop diseases and pests, [2][3][4] improving crop yields and providing greater food security for society. However, although the use of pesticides brings important benefits, including reduced crop damage and, consequently, increased food quality and quantity, these substances have detrimental effects on the environment. [5][6][7] One of the negative effects of the use of chemical pesticides in agricultural systems is the impact on water resources, [1,7] depending on factors including the nature of the compound used, the mode of application, and climatic variations. [1,7] The low degradability of pesticides enables them to accumulate in the soil or to be transported to surface water and groundwater, causing further environmental damage. Although the soil is the main receptor medium for these chemicals, water resources including rivers, streams, lakes, and groundwater are highly susceptible to contamination, due to the interconnection between water bodies and soil. The persistence of these compounds resulting from agricultural practices in hydrographic basins is a threat to human health. [1,4,7] Contamination of groundwater by pesticides and their residues is recognized as a problem in both advanced and developing countries. [2,8] Consequently, the scientific community faces a continuous challenge to develop suitable materials, together with new and more efficient technologies, for the

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“…Pesticides consist of a set of insecticides and herbicides, primarily applied in forestry and crop plantations. In the case of chlorothalonil (CTL), nitrofen (NF), trifluralin (TFL), and dicloran (DCN), these carcinogens accumulate easily in the body, resulting in acute concentrations that cause cancers in humans and livestock [ 2 ]. Therefore, various detection methods are being investigated, including capillary electrophoresis [ 3 , 4 ], liquid chromatography [ 5 , 6 ], and electrochemical methods [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Pyrene-Based Fluorescent Porous Organic Polymers for Recognition and Detection of Pesticides

et al. 2021

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Eating vegetables with pesticide residues over a long period of time causes serious adverse effects on the human body, such as acute poisoning, chronic poisoning, and endocrine system interference. To achieve the goal of a healthy society, it is an urgent issue to find a simple and effective method to detect organic pesticides. In this work, two fluorescent porous organic polymers, LNU-45 and LNU-47 (abbreviation for Liaoning University), were prepared using π-conjugated dibromopyrene monomer and boronic acid compounds as building units through a Suzuki coupling reaction. Due to the large π-electron delocalization effect, the resulting polymers revealed enhanced fluorescence performance. Significantly, in sharp contrast with the planar π-conjugated polymer framework (LNU-47), the distorted conjugated structure (LNU-45) shows a higher specific surface area and provides a broad interface for analyte interaction, which is helpful to achieve rapid response and detection sensitivity. LNU-45 exhibits strong fluorescence emission at 469 nm after excitation at 365 nm in THF solution, providing strong evidence for its suitability as a luminescent chemosensor for organic pesticides. The fluorescence quenching coefficients of LNU-45 for trifluralin and dicloran were 5710 and 12,000 (LNU-47 sample by ca. 1.98 and 3.38 times), respectively. Therefore, LNU-45 serves as an effective “real-time” sensor for the detection of trifluralin and dicloran with high sensitivity and selectivity.

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A trifluoromethyl-grafted ultra-stable fluorescent covalent organic framework for adsorption and detection of pesticides

Abstract: A fluorine-rich ultra-stable fluorescent covalent organic framework for adsorption and detection of pesticides was designed and prepared via the Povarov reaction in a flask.

Cited by 91 publications

References 61 publications

Pyrimidine‐Functionalized Covalent Organic Framework and its Cobalt Complex as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Pyrimidine‐Functionalized Covalent Organic Framework and its Cobalt Complex as an Efficient Electrocatalyst for Oxygen Evolution Reaction

Biopolymer‐Nanocomposite Hybrid Materials as Potential Strategy to Remove Pesticides in Water: Occurrence and Perspectives

Pyrene-Based Fluorescent Porous Organic Polymers for Recognition and Detection of Pesticides

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