JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Mingguang Ma,Jing Lu,Ling Wang,Xia Qiu,Tingting Xu,Sufan Wang,Yinggui Zhu
In this work, we first reported the electrochemiluminescence (ECL) properties of 2-hydroxynicotinic acid (2-HNA) with 0.09 M K 2 S 2 O 8 in 0.5 M H 3 BO 3 – Na 2 B 4 O 7 buffer solution. The effects of the type of co-reactant, the concentration of K 2 S 2 O 8 and the pH of the buffer solution on the ECL intensity of this system were investigated. And the possible mechanism of 2-HNA/ K 2 S 2 O 8 system has been speculated by fluorescence spectrum and ECL spectrum. Besides, we found that phloxine B (PB) can significantly enhance the ECL intensity of the 2-HNA/ K 2 S 2 O 8 system. It is speculated that an electrochemiluminescence resonance energy transfer (ECL-RET) process may occur between 2-HNA and PB, so that PB enhanced the ECL of the 2-HNA system. Combining the ultraviolet spectrum and density functional theory (DFT) calculations further proved the rationality of this speculation. Based on this, a new method of ECL detection of PB with high sensitivity and high selectivity was established.
研究领域:
分析化学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
San-Tai Wang,Guo-Long Wang,Zhiwei Xin,Junhua Xu,Chao Zhao,Lisheng Chi,Jian Zhang,Wei-Hui Fang
The capture of radioactive iodine is crucial for nuclear safety, but conventional silver-based adsorbents suffer from low silver utilization efficiency. Instead of traditional physical loading, we report an adaptive synthesis strategy for integrated chemical construction of silver-on-boehmite platform to achieve atom-economic iodine adsorption. The designed materials incorporate a boehmite-like support capable of anchoring single silver sites (-N–Ag–N-) along with tunable surfactant-like pendant alcoholic groups. This labile site allows partial-to-complete coordinative substitution, enabling the construction of a library of nearly 20 distinct adsorbents. Such flexible design ensures monodispersion of the unsaturated silver active centers while permitting precise modulation of their maximization exposure and accessibility. Compared to traditional adsorbents, Methanol-functionalized AlOC-188-OMe achieves comparable iodine adsorption capacity but faster capture kinetics without relying on high porosity. The sequential confinement and release of I 2 within the channels were directly visualized through single-crystal X-ray diffraction. Furthermore, the material demonstrates scalable synthesis (up to ∼10 g per batch) with avoidance of silver mirror reactions, excellent radiation resistance and promising dynamic adsorption performance—collectively underscoring its strong potential for practical applications. This work provides a novel paradigm for designing high-efficiency adsorbents by maximizing the utility of precious metal atoms.
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2017
·
IF 4.529
Wengang Zhang,Yong Han,Xiumei Chen,Xueli Luo,Jianlong Wang,Tianli Yue,Zhonghong Li
A Mn-doped ZnS quantum dots (QDs) based nanosensor for selective phosphorescent determination of patulin (PAT) was synthesized with 6-hydroxynicotinic acid (6-HNA) as dummy template via a surface molecular imprinting sol–gel process. FTIR and XRD indicated the successful graft of molecularly imprinted polymer (MIP) onto crystal QDs. Binding tests revealed that the MIP-QDs presented higher selectivity, adsorption capacity and mass transfer rate than non-imprinted polymers, demonstrating a specific recognition for PAT among competitive mycotoxins and its analogues with the imprinting factor of 2.02. The MIP-QDs could recognize PAT in a linear range of 0.43–6.50 μmol L −1 with a detection limit of 0.32 μmol L −1 and a correlation coefficient (R 2 ) of 0.9945. Recoveries of 102.9–127.2% with relative standard deviations <4.95% were achieved in apple juice samples which were in good agreement with high-performance liquid chromatography (HPLC) (P > 0.05). The results indicated a simple phosphorescent nanosensor for PAT detection in complex matrix.
研究领域:
食品科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 34
·e202301948
·
IF 2.1
Hai-Bo Wu,Xian-Tai Zhou,Xiao-Wu Zhou,Yan-Xiong Fang
Graphical Benzoic acid has been proved to be an efficient catalyst for the ring-opening polymerization of ϵ-caprolactone under mild conditions. A monomer-activated ring-opening polymerization mechanism mediated by benzoic acid was proposed. It is expected to realize the one-step preparing of poly (ϵ-caprolactone) through the direct aerobic oxidation of cyclohexanone. The development of a feasible industrial method for poly(ϵ-caprolactone) (PCL) preparation is great of significant and challenging. The bulk ring-opening polymerization of ϵ-caprolactone (ϵ-CL) using various organic acid catalysts and benzyl alcohol (BnOH) as the initiator was developed. Benzoic acid (BA) has been proved to be an efficient catalyst for the ROP of ϵ-CL under mild conditions. The conversion of ϵ-CL to PCL was 84.7 % under the optimized reaction conditions, with number-average molecular weight ( M n ) and dispersity (PDI) of 7700 g/mol and 1.25, respectively. Moreover, a monomer-activated ring-opening polymerization mechanism mediated by benzoic acid was proposed. Overall, this work is expected to provide a feasible industrial method for the preparation of PCL using benzoic acid as organocatalyst.
研究领域:
高分子化学
·
有机催化
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产品关联
DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Wanru Gao,Yuping Li,Yunping Zhoujin,Qun Zeng,Liwen Fang,Sean Parkin,Tonglei Li,Shigang Ruan,Sihui Long
Four 2-hydroxy-N-alkyl-N-phenyl-nicotinamides (1–4) were synthesized, and their crystal structures were analyzed to investigate the effect of substitution on their crystal packing of N-phenyl-2-hydroxynicotinanilides. In these compounds, substituents were introduced on the amide N, leading to a peptoid-like structure. One solvent-free form and two hydrates were harvested for compound 1, and one anhydrous form and one hydrate were obtained for compound 2. Polymorphism was observed in compounds 3 and 4. The molecules were found to be in the keto form rather than the enol tautomer. Because of steric effects, the molecules took on an E configuration, leading to a hairpin-like geometry. A lactam–lactam dimer synthon was formed in all solvent-free structures, and a tetramer motif was observed for the first time. Dehydration of the two hydrates of 1 and the hydrate of 2 led to their respective solvent-free form. Phase transition between the polymorphs was revealed in compound 3. Theoretical calculations, including conformational energy evaluation, hydrate forming propensity assessment, and lattice energy appraisal, were performed to provide a reasonable explanation for the keto tautomer and the formation of the hydrates of compound 1.
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DOI
PubMed
高影响因子
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