TALANTA
·
2017
·
IF 4.162
Ting Yu,Guoxing Yin,Tingting Niu,Peng Yin,Haitao Li,Youyu Zhang,Haimin Chen,Ying Zeng,Shouzhuo Yao
A novel fluorescent probe ( E )-3-ethyl-2-(4-hydroxystyryl)-1,1-di-methyl-1 H -benzo-[ e ]indolium iodide (probe EDB) based on benzo[ e ]indolium was synthesized, which provided the simultaneous detection of SO 3 2- /HSO 3 - and HSO 4 - ion with different emission channels. Based on the principle of ion-induced rotation-displaced H-aggregates, when treated with NaHSO 4 , a fluorescence enhancement at 580 nm was observed with the excitation wavelength at 420 nm. While, in the advantage of the nucleophilic addition of SO 3 2- to the vinyl group, strong fluorescence was obtained at 455 nm when treated with Na 2 SO 3 with the excitation wavelength at 320 nm, along with obvious color change by naked eyes. So the probe could be applied to sense SO 3 2- /HSO 3 - and HSO 4 - ion via different excited and emission channels simultaneously. The probe was also applicable for fluorescence imagings of bisulfite and hydrosulfate in HeLa cells.
研究领域:
分析化学
·
生物化学
·
医学
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yimei Wang,Yaoyao Zhang,Xing Qiao,Shangde Sun
Tyrosol is a natural phenolic compound with potent antioxidant properties in the field of food manufacturing. However, the low lipophilicity of tyrosol limited its application. Therefore, the construction of tyrosol laurate (Tyr-L) could effectively overcome the limitations of tyrosol. In this work, four ionic liquids (ILs) were applied for TYr-L preparation. Among them, the 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim]HSO 4 ) showed the best catalytic performance. The maximum TYr-L yield was achieved (94.24 ± 1.23 %) under the optimal conditions (reaction temperature 119 °C, substrate ratio 1:6.7, IL dosage 9.2 %, and reaction time 12 h). The kinetic and thermodynamic parameters were also evaluated and it was found that E a, Δ H , Δ S , and Δ G were 80.81 kJ·mol −1 , 77.63 kJ·mol −1 , −82.08 J·(mol·K) −1 , and 109.89 kJ·mol −1 , respectively. The acidic [Bmim]HSO 4 demonstrated excellent reusability and stability, even after 6 cycles. Furthermore, TYr-L showed superior ABTS radical scavenging ability, which could be further applied in various industrial processes.
研究领域:
化学
·
食品科学
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2019
·Vol. 43
·期 3
·403-411
·
IF 2.418
Huan Li,Tian Ma,Zhensheng Shen,An Li,Jie Yang,Dong Xiang,Jiuyi Liu,Shuguang Deng,Yingqiang Sun
1-Butyl-3-methylimidazolium hydrogen sulfate ([Bmim][HSO 4 ]) is utilized to catalyze transesterification of camelina oil with methanol. The major compositions of camelina biodiesel are saturated fatty acid esters (C16:0, C18:0), monounsaturated, and polyunsaturated fatty acid esters (C18:2, C18:3). The effects of reaction temperature, reaction time, M methanol : M Camelina oil , and M [Bmim][HSO4] : M Camelina oil on biodiesel production are investigated in detail, and a general mathematical model is developed to well predict the biodiesel yield. Also, [Bmim][HSO 4 ] is thermally stable to recycle for four times with a high biodiesel yield. The fuel properties of camelina biodiesel are all comparable to the American Society for Testing Materials (ASTM) standards.
研究领域:
能源科学
·
化学工程
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2024
·Vol. 11
·期 3
·881-888
·
IF 5.8
Yingkang Chen,Cheng-Wei Kao,Tao Luo,Hang Zhang,Yan Long,Junwei Fu,Zhang Lin,Liyuan Chai,Ting-Shan Chan,Min Liu
Tetrafluoromethane (CF4), as the simplest and most abundant perfluorocarbon in the atmosphere, is listed in the ‘United Nations Framework Convention on Gases’ for its strong greenhouse potential. With its increasing atmospheric emissions, catalytic hydrolysis of CF4 as a non-toxic by-product method has been extensively studied. However, the highly symmetric and inert structure of CF4 makes it hard to be adsorbed on the catalyst surface. Herein, we developed a protonated sulfate (–HSO4) modified ZrO2 (S-ZrO2) to enhance CF4 adsorption and achieve its complete decomposition at 650 °C, which was superior to common γ-Al2O3. Combining the surface acidity test, in situ infrared spectroscopy and density function theory simulations, we demonstrated that the introduced –HSO4 effectively enhances the Lewis acidity of adjacent Zr sites, which shows strong CF4 adsorption ability and promotes its decomposition.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 7
·4001-4013
·
IF 1.674
Dong Zhen Ming,Wang Jia Na,Wang Wei,Chao Jian Bin,Wang Yu
A very simple Schiff Base derived from 1-Naphthylamine and 4-(Trifluoromethy) benzaldehyde (L) was prepared as a selective colorimetric and turn-on fluorescent sensor for hydrogen sulfate. In the CH 3 CN:H 2 O (3:2, v/v) solvent system, L shows a highly selective colorimetric response to HSO 4 − ions by changing its color from yellow to colorless immediately. In addition, the weakly fluorescent receptor L shows a highly selective enhancement of fluorescence intensity at 425 nm for HSO 4 − upon excitation at 320 nm. The recognition process is proven to be hardly influenced by the other tested competitive anions. The sensing is suggested to involve a hydrolysis process promoted by HSO 4 − which has been further supported by UV–Vis, 1 H NMR and HRMS spectroscopic studies. Applicability of L to detect HSO 4 − in tap water has been demonstrated. An easy-to-prepare test strip of L has also been made for the naked-eye detection of HSO 4 − in real samples.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Qian Zeng,Biao Hu,Hongye Cheng,Lifang Chen,Junmei Huang,Zhiwen Qi
Isobutyl isobutyrate is an important chemical which can be formed in a reactive extraction process with ionic liquid as dual solvent-catalyst. To design such an intensified process, the liquid-liquid equilibria (LLE) data for the esterification system involving ionic liquid are essential. In this work, the LLE of ternary systems {isobutyl isobutyrate (IBIBE) + isobutyric acid (IBAc) or isobutanol (IBOH) + 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIm][HSO 4 ])} and the quinary system {IBAc + IBOH + IBIBE + H 2 O + [BMIm][HSO 4 ]} were measured at temperature T = (298.2, 323.2 and 353.2) K, T = (323.2, 333.2, 343.2 and 353.2) K and atmospheric pressure, respectively. Based on the experimental data, the solute distribution coefficient and the selectivity were determined, which confirms the feasibility of the ionic liquid for isobutyl isobutyrate formation. The phase behaviour was explained by the molecular interaction using σ -potential analysis. Moreover, the binary parameters of the NRTL model for [BMIm][HSO 4 ] catalysed isobutyl isobutyrate formation system were fitted.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
Royal Society Open Science
·
2018
·Vol. 5
·期 9
·
IF 2.504
Benyong Han,Wudi Zhang,Fang Yin,Shiqing Liu,Xingling Zhao,Jing Liu,Changmei Wang,Hong Yang
Methyl laurate was synthesized from lauric acid (LA) and methanol via an esterification reaction using ionic liquids (ILs) as catalysts. The efficiencies of three different catalysts, 1-methylimidazole hydrogen sulfate ([Hmim]HSO4), 1-methyl-2-pyrrolidonium hydrogen sulfate ([Hnmp]HSO4) and H2SO4, were compared. The effect of the methanol/LA molar ratio, reaction temperature, reaction time and catalyst dosage on the esterification rate of LA was investigated by single-factor experiments. Based on the single-factor experiments, the esterification of LA and methanol was optimized using response surface methodology. The results showed that the most effective catalyst was the IL [Hnmp]HSO4. The optimal conditions were as follows: [Hnmp]HSO4 dosage of 5.23%, methanol/LA molar ratio of 7.68 : 1, reaction time of 2.27 h and reaction temperature of 70°C. Under these conditions, the LA conversion of the esterification reached 98.58%. A kinetic study indicated that the esterification was a second-order reaction with an activation energy and a frequency factor of 68.45 kJ mol−1 and 1.9189 × 109 min−1, respectively. The catalytic activity of [Hnmp]HSO4 remained high after five cycles.
研究领域:
化学工程
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Qian Zeng,Zhen Song,Hao Qin,Hongye Cheng,Lifang Chen,Ming Pan,Yi Heng,Zhiwen Qi
Butyl hexanoate (BuHE) is currently synthesized through the Fischer esterification with mineral acid as catalyst, which suffers from the problems of side reaction, difficult recycling, and corrosion. To overcome these disadvantages, ionic liquid 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIm][HSO 4 ]) is employed as dual catalyst-solvent for the esterification of hexanoic acid (HeAc) with n-butanol (BuOH) in a reactive extraction process. The dual functions of [BMIm][HSO 4 ], extraction and catalysis, were confirmed by liquid-liquid equilibria for the two systems {[BMIm][HSO 4 ] + HeAc + BuHE} and {[BMIm][HSO 4 ] + BuOH + BuHE}, and by the comparison of esterifications with or without [BMIm][HSO 4 ], respectively. Moreover, the optimal reactive extraction conditions for BuHE formation were obtained. Finally, the possible mechanism of intensification of [BMIm][HSO 4 ] on BuHE formation in reactive extraction process was proposed.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 16
·9744-9754
·
IF 4.036
Xuejing Liu,Xiaowei Chen,Hao Zhang,Shangde Sun
Caffeic acid (CA) is widely found in nature, and has a broad spectrum of biological activities. However, the low hydrophilicity and lipophilicity of CA limited its application. Dodecyl caffeate (DC) is the lipophilic ester of caffeic acid (CA), and also has high antioxidant activity. In this work, CA, used as a substrate, and three ionic liquids with different acidities and H2SO4 were used as economic catalysts for DC preparation. The effects of variables on DC yield were investigated and optimized by response surface methodology (RSM). And the kinetic and thermodynamic parameters of the esterification of CA and dodecanol were evaluated. Results showed that lipophilic DC was successfully synthesized using ionic liquid ([Hnmp]HSO4) as a catalyst. And the optimal conditions by RSM were substrate ratio of 10.2 : 1, IL dosage of 9.8% at 87 °C for 118 min. Under the optional conditions, the maximum DC yield was 94.67 ± 1.32%. The k0, Ea, ΔH, ΔS, and ΔG were 7.18 × 107 mol (L min)−1, 65.77 kJ mol−1, 63.10 kJ (mol K)−1, −103.80 J (mol K)−1, and 99.78 kJ mol−1 at 363 K, respectively. DC prepared in this work showed a good DPPH radical scavenging activity, which indicated that DC can be used as a potential antioxidant in food and cosmetics.
研究领域:
化学
·
材料科学
·
食品科学
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2012
·
IF 3.794
Xiu-Ming Liu,Ya-Ping Li,Wei-Chao Song,Qiang Zhao,Xian-He Bu
A new ditopic ion pair receptor 1 containing two biindole moieties and a bis-benzocrown ether unit shows a remarkable color switching (ON- and -OFF) function induced by anion (F − ) and cation (K + ) recognition. The ditopic receptor 1 binds in a cooperative fashion to HSO 4 − in the presence of 1 ·K + and acts as a selective ditopic receptor to recognize ion pairs with a wavelength-ratiometric manner.
研究领域:
超分子化学
·
分析化学
·
传感器与探针
·
阴离子识别
·
分子开关
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Dongchen Shen,Qiancan Wang,Song Li,Zhengkai Tu
Protic ionic liquids (PILs) serve as efficient proton carriers to enhance the proton conductivity of composite proton exchange membranes (PEMs). However, systematic investigations and durability evaluations of PIL-based PEMs for water electrolysis are insufficient, and their underlying microscopic mechanisms remain ambiguous. Herein, Nafion composite membranes modified with different concentrations of 1-methyl imidazolium hydrogen sulfate ([MIm][HSO 4 ]) were fabricated. The optimized 5% [MIm][HSO 4 ] membrane achieves a 12% enhancement in proton conductivity. Molecular dynamics simulations demonstrate that [MIm][HSO 4 ] induces water accumulation around sulfonic acid groups, constructing interconnected water channels and stable hydrogen-bonding networks to facilitate proton transport. The corresponding membrane electrode assembly delivers 3.8% higher electrolysis efficiency and a low degradation rate of 0.21 mV/h. Further, 96 h constant-current and 24 h dynamic load tests demonstrate the promising durability of the composite membrane.
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Xuejing Liu,Yaoyao Zhang,Shangde Sun
Caffeic acid (CA), as a potential green antioxidant, plays an important role in food processing. However, the low liposolubility of CA limits its applications. To overcome this issue, CA is normally modified by introducing a lipophilic group, such as alkyl alcohols, resulting in the formation of alkyl caffeate, which can significantly enhance the liposolubility of CA. In this study, a binuclear ionic liquid , 1,1-bis(2-pyrrolidinone) sulfate ([C 3 (Hnhp) 2 ][HSO 4 ] 2 ), is successfully synthesized and characterized by FT-IR and 1 H NMR. The physico-chemical properties of [C 3 (Hnhp) 2 ][HSO 4 ] 2 , including the density, viscosity, thermal stability and Brønsted acidity, were analyzed. As a novel catalyst for the esterification of CA with model dodecanol , its catalytic performance was investigated and optimized by response surface methodology. Under the optimal conditions, a 95.42 ± 1.01% yield of dodecanol caffeate was achieved. Moreover, the [C 3 (Hnhp) 2 ][HSO 4 ] 2 exhibits excellent stability and reusability, making it a highly promising catalyst for the synthesis of various lipophilic alkyl caffeates.
研究领域:
食品科学
·
有机化学
·
绿色化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）