ACS Sustainable Chemistry & Engineering
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2019
·
IF 6.97
Weichen Wang,You Liang,Jiale Yang,Gang Tang,Zhiyuan Zhou,Rong Tang,Hongqiang Dong,Jianqiang Li,Yongsong Cao
Mesotrione is one of the triketone herbicides that are widely used in corn fields to control broadleaf and some grass weeds because of its high herbicidal activity and crop safety. However, mesotrione is unstable during the progress of storage and application and can easily enter the groundwater to cause environmental pollution due to its high leakage in soil. In this study, 22 new salts based on mesotrione, most of which were defined as herbicidal ionic liquids (HILs), were synthesized by pairing with different structural cations to optimize the physicochemical properties for solving these problems of mesotrione. The results showed that the water solubilities of HILs were no longer limited by pH and could be decreased by selecting suitable paired cations. Also, HILs exhibited a higher thermal stability, lower surface tension, higher octanol–water partition coefficient, and better soil adsorption capacity and herbicidal activity than mesotrione. HIL-22 paired with cetylpyridinium could meet the requirements such as efficacy control, thermal stability, and reduction of environmental risk based on the physicochemical properties and biological activities. This study showed the novel HILs could make contributions to solve the problems existing in the practical applications and reduce the negative impact of herbicides on the environment.
研究领域:
农业科学
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环境科学
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化学
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2023
·Vol. 25
·期 12
·1-12
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IF 2.5
Du Pengfei,Song Jiamu,Zou Xinya,Han Zhenlong,Li Jiayan,Chen Baoshan,He Xipu
Mesotrione is considered as an effective triketone herbicide for the control of major broadleaf grasses and some Gramineae weeds. However, over-application of mesotrione poses significant environmental and ecological hazards. The development of a mesotrione fluorescent sensor is essential for detecting mesotrione. A novel fluorescent probe (nitrogen and sulfur co-doped graphene quantum dots (N, S-GQDs)) was designed for the rapid analysis of mesotrione in real water samples. N, S-GQDs synthesized by pyrolytic carbonation have the multilayer graphene structure with the size range of 9.8–29.1 nm, the average size of 19.2 nm, and the average height of 9.7 nm. The fluorescent probe was capable of emitting high-intensity fluorescence. And when mesotrione was mixed with the fluorescent probe, the fluorescence of the probe was rapidly quenched by static quenching and the internal filter effect. The fluorescent probe provided great sensitivity and selectivity in the linear range of 0.5–15 and 15–700 μM for the detection of mesotrione with the detection limit (LOD) of 0.26 μM. Noticeably, real sample tests illustrated the use of the fluorescent probe for mesotrione was a promising strategy.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2019
·Vol. 411
·期 21
·5519-5530
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IF 3.286
Sun Xue,Liu Yiru,Niu Na,Chen Ligang
A novel fluorescent probe based on molecularly imprinted polymers (MIPs) coupled with carbon quantum dots (CQDs) was fabricated and successfully used for selective recognition of mesotrione. In this probe, the biomass-derived CQDs were prepared through a hydrothermal method using mango peels as carbon source, and the whole synthesis procedure was green without chemical reagents. The CQDs were encapsulated into MIPs by using sol-gel technology. After removal of the template molecule mesotrione, specific binding sites are formed and there is electrostatic attraction between the probe and the template molecule. The synthetic CQDs@MIPs were able to selectively capture the target mesotrione with fluorescence quenching via the specific interaction between mesotrione and the recognition cavities. The probe was used for determination of mesotrione in corn to verify the practicality of the proposed method. The detection limit of mesotrione was 4.7 nmol L −1 , and the linear range was 15 nmol L −1 to 3000 nmol L −1 . Meanwhile, the recoveries of this method for mesotrione were 91.4–96.2%, and the relative standard deviations (RSDs) were 3.2–6.1%. This work provides a novel research method to synthesize CQDs@MIPs with high selectivity (imprinting factor = 5.6), and which can be used for convenient, rapid recognition and sensitive detection of trace compounds from complex matrices.
研究领域:
分析化学
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环境监测
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食品安全
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材料科学
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分子识别
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痕量检测
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高影响因子
FOOD CHEMISTRY
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2017
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IF 4.529
Pengqiang Du,Xiaohu Wu,Jun Xu,Fengshou Dong,Xingang Liu,Dongmei Wei,Yongquan Zheng
In this study, an efficient and fast method for the determination of the herbicide mesotrione and its two metabolites [4-methylsulfonyl-2-nitrobenzoic acid (MNBA) and 2-amino-4-methylsulfonylbenzoic acid (AMBA)] in rice, rice plants, rice hulls , water, and soil was developed, using ultra performance liquid chromatography coupled with tandem quadrupole (Xevo TQ-S) mass spectrometry (UPLC-Xevo TQ-S-MS/MS). The recoveries of the compounds were 68.6%–108.4% at different levels. The intra-day relative standard deviation (RSD) ranged from 2.0% to 14.4%, and the inter-day RSD, from 1.9% to 11.4%. The limits of quantification (LOQ) were ranged from 0.146 to 4.545 μg kg −1 for mesotrione, MNBA and AMBA. Dissipation and residual assays with the commercial formulation were conducted at three locations. The dissipation rates of the compounds were fast in rice plants, soil, and water, and residues at harvest were not detected in any of the three localities.
研究领域:
环境化学
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农学
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分析化学
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农药残留分析
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食品安全
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Xiaoqin Shen,Yinsheng Liu,Bing Yan
Covalent organic frameworks (COFs) have been widely investigated owing to their tunable structures and multifunctionality, with pore engineering further enhancing their physicochemical properties. Herein, a hydroxyl-functionalized COF (PyTFPB-OH) was synthesized via solvothermal condensation of 5′-(4-formyl-3-hydroxyphenyl)-3,3″-dihydroxy-[1,1′:3′,1″-terphenyl]-4,4″-dicarbaldehyde (TFPB-OH) and 4,4′,4″,4″‘-(pyrene-1,3,6,8-tetrayl)tetraaniline (Py), followed by post-synthetic modification (PSM) under mild conditions to incorporate azo units, yielding PyTFPB-azo. Comprehensive characterization confirmed the successful PSM, with the introduced azo units significantly enhancing multifunctionality. In terms of detection, the modified COF retained intrinsic fluorescence while exhibiting enhanced oxidase-like activity, enabling dual-mode detection of the herbicide mesotrione (MST) through fluorescence (LOD of 0.168 μM) and colorimetry (LOD of 0.038 μM) modalities. Importantly, the inherent synergy between these two detection modalities allowed for self-calibration, improving the accuracy and reliability of MST quantification. Furthermore, photoinduced trans -to- cis isomerization of azo units under 365 nm irradiation modulated pore environments, increasing MST adsorption efficiency through strengthened substrate interactions. Overall, this work establishes a multifunctional platform combining sensing and adsorption capabilities, alongside an effective PSM strategy to optimize metal-free COF-based nanozyme design.
研究领域:
材料化学
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分析化学
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环境科学
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纳米科技
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催化化学
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传感器技术
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高影响因子
危险品化学品经营许可证（带存储）