SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Mingzhen Shi,Wenjie Xiong,Xiaomin Zhang,Jialan Ji,Xingbang Hu,Zhuoheng Tu,Youting Wu
Highly efficient and selective H 2 S capture is of great scientific significance for natural gas sweetening. However, there was seldom research concerned about the chemical absorption of H 2 S in deep eutectic solvents (DESs) and the absorption capacity is hard to be satisfactory. In this work, we propose a new strategy of designing task-specific DESs endowed with chemical dual sites for H 2 S capture. Therefore, four task-specific DESs bearing with tertiary amine and acetate anion, including [C 1 -TMHDA]Ac-MDEA (1:2), [C 1 -TMHDA]Ac-Pyrol (1:2), [C 1 -TMHDA]Ac-AA (1:2), and [C 1 -TMHDA]Ac-Im (1:2), were designed and prepared. Among them, [C 1 -TMHDA]Ac-MDEA (1:2) showed the unprecedented H 2 S absorption capacity of 1.44 mol/mol at 313.2 K and 1.0 bar, surpassing all the reported absorbents. The interaction mechanism was elucidated by both spectroscopic analysis and quantum chemical calculations. In addition, five consecutive absorption–desorption cycles were performed and evaluated the recyclability of [C 1 -TMHDA]Ac-MDEA (1:2) by heating and evacuating. Compared with other absorbents, these task-specific DESs represent prominent superiority on both H 2 S absorption capacity and H 2 S/CO 2 selectivity, which are expected to be excellent alternatives in the field of acid gas separation.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 25
·11903-11911
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IF 3.3
Tingzhong Li,Qinglu Yu,Zhuang Du,Jie Gao,Dong LU,Rui Liang,Guoxing Sun
A convenient and mild method for preparing multicolor carbon dots (CDs) using the solvothermal process and extraction has been developed. After doping CDs as the cross-linking agent into γ-(2,3-epoxypropoxy)propytrimethoxysilane solution, orange, yellow, and blue emitting powders were fabricated, which effectively avoid aggregation-caused quenching and emit bright luminescence. By introducing oily chain segments, the interaction between the fluorescent powder and fingerprint residue is improved as well as the imaging ability of latent fingerprints. Level 1–3 features can be extracted using the CD powder developed fingerprints. Additionally, seven substrates with different surface appearance, colours, and interference were chosen to deposit on fingerprints, in which all the substrates have a good combination with the CD powder and showed excellent contrast and visibility. Notably, the as-prepared CDs can be used for acetate ion (AcO−) sensing. The CDs exhibit an efficient response to AcO− by an ‘‘on–off’’ switching strategy. As a sensing probe, the CDs exhibit a wide concentration range (3 × 10−7–3 × 10−3 M) of response to AcO− with a low fluorescence response threshold (0.3 μM).
研究领域:
材料科学
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化学
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法医学
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Xinyu Liu,Bo Tang,Yang Gao,Xiaoyan Qi,Fengming Zhao,Zhaoyang Chen,Yinghong Zhu,Huajun Zheng,Youqun Chu
An efficient indirect electrosynthesis method for the preparation of 2,6-dichlorobenzonitrile has been developed, utilizing iodide ions as a redox mediator in the presence of acetate ions. The experimental results demonstrate that the addition of OAc − ions significantly influences the electrochemical behavior of I − ions, primarily through the complexation of OAc − ions with I 2 and I + species. This complexation facilitates the formation of [I 2 OAc] − ions, which are readily oxidized at the anode to generate I + ions. These I + ions are subsequently stabilized by OAc − ions, forming highly electrophilic [IOAc 2 ] − species. This mechanism leads to an enhanced yield of 2,6-dichlorobenzonitrile in the iodide-mediated indirect electrosynthesis reaction. Furthermore, compared to previous systems employing chloride ions, the present method exhibits a higher cyanation yield, indicating that [IOAc₂]⁻ ions possess superior electrophilic activity relative to [ICl₂]⁻ ions, thereby promoting the efficient cyanation of 2,6-dichlorobenzaldehyde. The method also demonstrates broad applicability, achieving good yields with various aromatic aldehydes. These findings highlight the potential of this approach for the synthesis of aromatic nitriles, particularly in the indirect electrosynthesis of nitriles from their corresponding aldehyde precursors. This work provides a promising strategy for the development of sustainable and efficient electrochemical synthesis methods in organic chemistry.
研究领域:
有机电化学
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电化学合成
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有机化学
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氧化还原化学
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氰化反应
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DOI
高影响因子
TALANTA
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2018
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IF 4.244
Yanwei Luo,Ruidi Shen,Tingting Li,Cen Xiong,Gongke Li,Liansheng Ling
Acetate ion was widely used in pH buffer to control pH environment. Here we firstly found that acetate ion had mimic peroxidase activity. Acetate ions are capable of catalyzing the decomposition of hydrogen peroxide and play a similar role to that of horseradish peroxidase (HRP). Acetate catalyzes the oxidation of tetramethylbenzidine (TMB) by H 2 O 2 , which is the product of the reaction of glucose and glucose oxidase . A colorimetric sensor for H 2 O 2 and glucose was developed using acetate ions. The linear regression equation for H 2 O 2 was A = 0.0029 C + 0.0530 ( C (μmolL −1 ), R = 0.9978), and the detection limit was 3.0 μmolL −1 , whereas that for glucose was A = 0.0021 C + 0.0709 (C (μmol L −1 ), R = 0.9977), and the detection limit was 4.0 μmol L −1 . Moreover, the proposed method was successfully applied for the detection of H 2 O 2 in human urine and glucose in human serum; thus, the proposed method could be used for the diagnosis of illness or disease. A single-enzyme-based glucose test paper was firstly prepared and tested for semi-quantitative analysis of glucose.
研究领域:
分析化学
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生物化学
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医学诊断
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DOI
PubMed
高影响因子
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