MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiutan Peng,Yuqing Xu,Weiye Zhou,Yiting Tao,Haiyan Fu,Siying Che,Yuanbin She
Evaluation of glyphosate content in tea products is a food safety topic worthy of social attention due to most glyphosate is dissolved in water as well during tea brewing. So it requires that the probe can not only realize the sensitive detection of glyphosate, but also has good water solubility to realize the practical detection of glyphosate in water-based samples such as tea infusions. To better suit the demands of practical applications, a water-soluble quinoline fluorescent ionic liquid probe (EHQCA) was synthesized for the sensitive detection of glyphosate by fluorescence “turn-off-on”. Interestingly, the introduction of the imidazolium cation module easily achieved the switchable water solubility of the fluorophore without complex group modification. According to the different competitive coordination ability, EHQCA-Cu 2+ with fluorescence-off was first constructed, and then Cu 2+ was captured by glyphosate to restore fluorescence. The probe behaved a sensitive (detection limit of 2.2 × 10 −8 M), rapid (less than 5 s) and selective response (among 20 interferences) to glyphosate. Meaningfully, satisfactory recovery (98–103 %) and low RSD (< 1.27 %) were obtained in 12 green tea infusions from different varieties and origins. Therefore, the ionic liquid-based fluorescent probes offers strong technical support for the detection of pesticides in foods such as tea, and have broad prospects in the field of food safety monitoring and evaluation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jing Li,Xinwei Du,Peipei Dong,Jianmin Wang,Jian Lin,Haisheng Wei
Chemoselective hydrogenation of quinoline and its derivatives is widely applicable in fine chemical production, yet it still faces grand challenges to obtain high activity and satisfactory selectivity simultaneously under mild conditions. In this study, we tuned the compositions of metallic Cu and Cu 3 N species by NH 3 treatment on CuO precursor at different temperatures. The specific catalyst after 375 °C treatment demonstrates excellent performance in the chemoselective hydrogenation of quinoline, achieving 98.8% conversion and >99% selectivity of 1,2,3,4-tetrahydroquinoline under mild reaction conditions (90 °C, 1 MPa), which significantly surpasses the performance of previously reported Cu-based catalysts. Moreover, the catalyst exhibits remarkable stability and substrate versatility. Various characterizations and DFT calculations reveal that there is obviously synergistic effect between metallic Cu and Cu 3 N species. Specifically, metallic Cu facilitates hydrogen dissociation, while Cu 3 N enhances the adsorption of quinoline molecules. These findings highlight the potential of Cu-based catalyst with dual active sites as a robust and efficient alternative for chemoselective hydrogenation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Jie Wu,Xiaoyu Bai,Jianbo Yang,Siman Li,Hua Mei,Yan Xu
Phenol, as an important industrial raw material, the traditional three-step method for preparing phenol has drawbacks such as numerous by-products and difficulties in oxidation. In this regard, we use nitrogen-containing cations that can make conjugated π electrons more active to assemble with Keggin-type polyoxometalates with excellent redox properties, which can not only enable Keggin-type polyoxometalates to obtain the catalytic performance of activated benzene rings, but also increase their stability in organic solvents. Therefore, we synthesized three zero-dimensional compounds ((C 10 H 10 N 2 ) 2 [HPMo VI 9 V V 3 O 40 (FeH 2 O) 0.5 ].1.5H 2 O ( 1 ), (C 7 H 10 N 4 ) 2 [H 3 PMo VI 8 V V 4 O 40 ] ( 2 ), (C 9 H 8 N) 3 [PMo VI 8 Mo V 4 V IV 2 O 42 ] ( 3 )) through simple hydrothermal and solvothermal methods using different nitrogen-containing cations and molybdovanadate. Structural analysis indicates that these three compounds are structurally similar, each consisting of its own molybdovanadate anion and protonated organic counter cations. The experiment demonstrated that compound 3 had a yield of 11.2 % and a selectivity of 93 % for phenol at 60°C. To further explore the oxidation performance of the compound, we selected different sulfides for oxidation experiments and found that it could completely oxidize sulfur-containing substances (such as BT) at 90°C. This indicates that the idea of combining molybdovanadate and nitrogen-containing organic cations has a promising application prospect in the benzene hydroxylation and Sulfur oxidation.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Zhenye Zhang,Shenghan Zhang,Shijie Wang,Yu Tan,Kexin Liang,Xinliang Guo,Xin Zheng
Liquid Organic Hydrogen Carriers (LOHCs) are recognized as promising candidates for hydrogen storage due to their compatibility with the existing oil and gas infrastructure, which facilitates large-scale and long-distance storage and transportation. However, the hydrogenation and dehydrogenation processes of traditional organic hydrogen carriers necessitate an external supply of hydrogen and are conducted under high temperature and pressure conditions, raising safety concerns for their practical implementation. This paper introduces a reversible electrochemical hydrogen storage system utilizing quinoline, a nitrogen heterocyclic organic compound, as the hydrogen carrier. In this system, water serves as both the solvent and the hydrogen source for quinoline hydrogenation, with self-supported lamellar NiCoP/NF electrodes function as electrocatalysts. The catalytic performance of NiCoP/NF electrode for electrochemical hydrogenation of quinoline and dehydrogenation of 1,2,3,4-tetrahydroquinoline (THQ) was evaluated in 1 M KOH solution under mild conditions. The findings revealed that the hydroconversion yield of quinoline was 95 % with a selectivity of 99 %. The dehydroconversion yield of THQ was 81.4 % with a selectivity of 81 %. These results suggest that the system is capable of effectively facilitating reversible hydrogen storage. The NiCoP/NF electrode maintained high catalytic activity even after five cycles, which underscores its excellent stability. The electrochemical hydrogenation of quinoline does not necessitate exogenous hydrogen, thereby conferring the system with superior safety performance. This study presents a sustainable and efficient approach to hydrogen storage within nitrogen heterocyclic organic compounds.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Dandan Luo,Lan Yi,Jialing Chen,Hao Luo,Yuncai Song,Yi Huang,Xiaoqin Wu,Wen-Ying Li
The upgrading of coal-based fuels by eliminating acidic phenols and basic N-heterocyclic compounds is key to generating clean fuels, yet their simultaneous elimination is still a formidable challenge. According to this research, a tetraethylammonium chloride/oxalic acid (TEAC/OA) deep eutectic solvent (DES) realizes high simultaneous extraction efficiencies (>97 %) and a synergistic promotion: m -cresol’s extraction efficiency is increased from 90.6 % to 97.5 % by the presence of quinoline. In order to reveal the origin of this high performance, the integration between multi-scale simulations and spectroscopic analysis was conducted. The findings reveal that the high performance is caused by a complex “division-of-labor” system, where the Cl – anion anchors m -cresol while the quinoline is sequestered by the TEA + and OA. This selective capture is thermodynamically boosted, with the target molecules showing greater calculated interplay energies than the oil matrix. A near two-order-of-magnitude reduction in the diffusion parameters of the target molecules upon extraction further confirms the merit of this molecular “caging”. This research shows an effective method to purify complicated fuel oils and set up a novel principle of synergistic design for next-generation extractive separation media.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）