JOURNAL OF CHEMICAL THERMODYNAMICS
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2022
·
IF 3.269
Huimin Li,Yueru Wang,Yidan Wu,Yu Li,Tao Li,Baozeng Ren
The solubility of 2-naphthoxyacetic acid in methanol, ethanol, n -propanol, i-propanol, i-butanol, n -pentanol, methyl acetate, ethyl acetate, n -propyl acetate, i-propyl acetate, acetonitrile, and acetone was determined with the gravimetric method under the barometric pressure in the temperature range of 278.15 K to 323.15 K. The experimental results indicate that the solubility of 2-naphthoxyacetic acid in the twelve solvents was positively related to temperature over the whole range of temperature studied. Six mathematical models were used to fit the experimental results, including modified Apelblat equation, UNIQUAC model, λh equation, NRTL model, Two-Suffix Margules model and Jouyban model. The best correlation results were shown using the modified Apelblat model. The Hansen Solubility Parameter (HSP) was used to discuss the order of solubility of 2- naphthoxyacetic acid in the studied solvents. In addition, the thermodynamic properties during the dissolution of 2-naphthoxyacetic acid were analyzed and discussed according to the Van't Hoff equation.
研究领域:
药物化学
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物理化学
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DOI
高影响因子
ENVIRONMENTAL RESEARCH
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2025
·
IF 7.7
Ning Liu,Ti-Bo Fang,Ling-Xi Zhao,Na Li,Xiang-Feng Chen,Ru-Song Zhao
Naphthalene acetic acid (NAA) is an auxin plant growth regulator (PGR) and widely used to regulate the growth process of plants. As excessive NAA enter the environment, it damages the ecological environment and endangers human life and health. Layered bimetallic hydroxides (LDHs) are widely used for the adsorption of pollutants due to their large surface area and excellent structural properties. Based on the classical Fe 3 O 4 @MgAl-LDH material, Fe 3 O 4 @FeMgAl-LDHs were synthesized by adding different contents of Fe element to adsorb NAA in water. The morphology and properties of Fe 3 O 4 @FeMgAl-LDHs and the effect of Fe on adsorption efficiency were studied. The adsorption process and adsorption mechanism of NAA were analyzed. The results indicated that the content of Fe element will affect the adsorption effect of NAA by influencing the specific surface area and adsorption sites of Fe 3 O 4 @FeMgAl-LDHs. The maximum adsorption capacity for NAA can reach 330.1 mg/g when the proportion of Fe is 0.50. Exploring the adsorption mechanism, Fe 3 O 4 @FeMgAl-LDHs achieved efficient removal of NAA through hydrogen bonding, van der Waals forces, anion exchange, and electrostatic interactions. The adsorption efficiency of various PGRs were deeply explored. Fe 3 O 4 @FeMgAl-LDH (Fe-0.50) has good adsorption and regeneration ability for various PGRs. Therefore, by exploring the influence of different Fe ratios on the adsorption efficiency of the Fe 3 O 4 @FeMgAl-LDH, the adsorption performance of the material can be improved, making it have greater application advantages in wastewater treatment containing drugs.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2021
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IF 7.514
Xi Chen,Yanan Yuan,Hongyuan Yan,Shigang Shen
This paper reports a selective, sensitive, and miniaturized analytical method based on a molecularly imprinted graphene oxide (MIP-GO) composite as adsorbent for miniaturized tip solid-phase extraction (MTSPE) to determine naphthalene-derived plant growth regulators (PGRs) in apples. The proposed method combines the advantages of MIP-GOs (high selectivity), MTSPE (low consumption), and high-performance liquid chromatography-fluorescence detection (high sensitivity). Under optimized conditions, the method exhibited appreciable linearity (2.00–200 ng/g), low detection limits (0.21–0.53 ng/g), high accuracy (absolute recoveries: 87.6–99.5%), and high precision (relative standard deviations ≤ 3.0%), along with low consumption (0.5 mL sample solution and 2.0 mg adsorbent). In addition, the adsorption performance of the MIP-GO adsorbent did not decrease over ten months, highlighting the long storage and operational lifetime of the adsorbent. The proposed method was employed for the analysis of naphthalene-derived PGR residues in apples and exhibited promising potential for application in food safety analysis.
研究领域:
食品安全分析
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分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
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IF 7.514
Meng-Jun Li,Na Li,Guiju Xu,Ling-Xi Zhao,Xiangfeng Chen,Yanfang Zhao,Ru-Song Zhao
A novel magnetic boron nitride nanosheets (Fe 3 O 4 @BNNSs) composite-based magnetic solid-phase extraction (MSPE) method was employed to analyse six plant growth regulators (PGRs) in tomatoes combined with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The novel Fe 3 O 4 @BNNSs composite was prepared via an in situ chemical coprecipitation process and characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and vibrating sample magnetometry (VSM). Several factors that may affect the extraction efficiencies were optimized. Under the optimal factors, low limits of detection (0.002–0.010 ng g −1 ), good linear ranges (0.05–10 ng g −1 ) and satisfactory precisions (intra-day: 1.2%-3.9%; inter-day: 2.1%-6.9%) were achieved. The established approach was successfully employed to extract and determine PGRs in tomatoes, and the spiked recoveries were between 85.2 and 109.0%.
研究领域:
分析化学
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纳米技术
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食品科学
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农业化学
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产品关联
DOI
PubMed
高影响因子
Communications Biology
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2024
·Vol. 7
·期 1
·1-14
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IF 5.2
Tan Chao,Li Suxin,Song Jia,Zheng Xianfu,Zheng Hao,Xu Weichang,Wan Cui,Zhang Tan,Bian Qiang,Men Shuzhen
Auxins and their analogs are widely used to promote root growth, flower and fruit development, and yield in crops. The action characteristics and application scope of various auxins are different. To overcome the limitations of existing auxins, expand the scope of applications, and reduce side effects, it is necessary to screen new auxin analogs. Here, we identified 3,4-dichlorophenylacetic acid (Dcaa) as having auxin-like activity and acting through the auxin signaling pathway in plants. At the physiological level, Dcaa promotes the elongation of oat coleoptile segments, the generation of adventitious roots, and the growth of crop roots. At the molecular level, Dcaa induces the expression of auxin-responsive genes and acts through auxin receptors. Molecular docking results showed that Dcaa can bind to auxin receptors, among which TIR1 has the highest binding activity. Application of Dcaa at the root tip of the DR5:GUS auxin-responsive reporter induces GUS expression in the root hair zone, which requires the PIN2 auxin efflux carrier. Dcaa also inhibits the endocytosis of PIN proteins like other auxins. These results provide a basis for the application of Dcaa in agricultural practices.
研究领域:
植物学
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分子生物学
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农业科学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Jiangping Cao,Lei Shi,Yifei Wang,Yiwei Liu,Baizhao Zeng,Faqiong Zhao
A new ferrofluid extractant (Fe 3 O 4 @SiO 2 -WDES) was ingeniously prepared by coating magnetic Fe 3 O 4 @SiO 2 microspheres with water-based deep eutectic solvent (WDES) and used for dispersive liquid-liquid microextraction (DLLME) and HPLC determination of naphthalene-derived plant growth regulators (PGRs, i.e., 1-naphthylacetic acid, 2-naphthylacetic acid, 1-naphthoxy acetic acid, 2-naphthyloxyacetic acid and 1-naphthylacetamide) in edible oil . Herein, mass transfer of the analytes in DLLME was significantly enhanced via increasing the contact surface by employing the microspheres as the supporter and dispersant of WDES , and phase separation can be efficiently achieved using an external magnet rather than centrifugation in traditional DLLME. Response surface methodology (RSM) based on Box-Behnken design (BBD) was employed for the optimization of core experimental conditions, and Analytical Eco-Scale and Analytical GREEnness Metric Approaches were adopted to evaluate the degree of greenness of the procedure. Under the optimal conditions, satisfactory performances of linearity ranged from 5 to 100 μg/L (R 2 ≥ 0.9982), limit of detection (0.58–0.91 μg/L), limit of quantitation (1.9–3.0 μg/L), precision (RSDs ≤ 5.5%), recovery (81.3%−108.1%) and negligible matrix effect were achieved, which introduced a promising alternative route for the determination of naphthalene-derived plant growth regulators in edible oil.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2023
·Vol. 224
·期 15
·2300076
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IF 2.5
Yuhang Zhang,Lu Bai,Zhirui Xu,Siyuan Chen,Junping Zheng
Dynamic bonds are usually used to endow thermoset materials with excellent reprocessability. Nevertheless, this strategy sacrifices the thermal stability in most instances. In recent years, the dynamic silyl ether (Si O R) has attracted great attention due to its excellent thermal stability. However, the reprocessability of thermoset materials based on it is far from satisfactory because of the inactive dynamic exchange reaction. Herein, a species of activated silyl ether with neighboring groups is identified via small-molecule model reaction and the corresponding activation energy is calculated by reaction kinetics for the first time. Based on the activated silyl ether linkages, the poly(dimethylsiloxane) elastomers with high mechanical strength, effective reprocessability, and thermal stability are further designed and prepared. In a word, this work fills a research gap about the effect of neighboring groups on the dynamic characteristic of silyl ether and provides a theoretical basis for the construction of activated silyl ether linkages, endowing the materials with thermal stability and efficient reprocessability.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）