ORGANIC & BIOMOLECULAR CHEMISTRY
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2018
·Vol. 16
·期 31
·5667-5676
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IF 3.423
Li Huang,Ying-Juan Cao,Xiang-Ying Sun,Bin Liu,Jiang-Shan Shen
Extending the research on 3,3′,5,5′-tetramethylbenzidine (TMB) and its derivatives in analytical chemistry is important, considering that TMB is widely used as an enzyme catalytic substrate. In this work, two TMB derivatives, TMBS and TMBB, were synthesized via a facile and one-step condensation reaction between the –NH2 group of TMB and the –CHO group of salicylaldehyde or benzaldehyde. Because at low pH the two Schiff base compounds can release TMB which can emit strong fluorescence, the probes could show dual-modal signal responses, fluorescence and UV-vis absorption, towards the pH. Practical applications of pH sensing in Chinese rice vinegar and lemon juice samples were successfully demonstrated. On the basis of these findings, a catalytic chromogenic reaction was developed to monitor the pH with the naked eye, too. Furthermore, considering the chemical equilibrium reaction between CO2 and H2O and that glucose oxidase (GOD) can catalyse the dehydrogenation and oxidation reaction of β-D-glucose to produce gluconic acid, both of which can result in lowering the pH values of the two Schiff base systems, highly sensitive and selective dual-modal sensing systems for detecting CO2 and β-D-glucose have also been successfully established. Therefore, the two synthesized TMB derivatives can demonstrate their robust application potential.
研究领域:
分析化学
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生物传感
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酶催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Green Energy & Environment
·
2021
·
IF 8.207
Siying Che,Jiachen Guo,Lu Gan,Qiaoxin Xiao,Haoran Li,Yuanbin She,Congmin Wang
An interesting phenomenon was found that fluorophore was introduced into ionic liquid (IL) to magnify fluorescence signal via the thermally activated delayed fluorescence process; thus up to 15 fold enhancements were achieved. Hence, we reported a succinct enhanced luminescence strategy to reduce single-triplet energy split by the tunability of ILs. This strategy could be extended to more kinds of ILs by the virtue of a preliminary DFT calculation screening. Moreover, the optical feature of IL sensor made it a promising candidate as a gas fluorescence sensor.
研究领域:
化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 25
·2989-2993
·
IF 2.073
Bingyan Han,Ying Li,Tingting Peng,Mingbo Yu,Xixi Hu,Gaohong He
In this paper, polyethyleneimine (PEI) was applied as a carbon source for synthesizing fluorescent carbon dots (CDs) through a facile and one-step hydrothermal route. Both the N-doping and the amino-functionalization of CDs were accomplished simultaneously. The CDs exhibited strong blue fluorescence and good dispersion in aqueous solution. A large number of amino groups on the surface of CDs greatly simplified the subsequent modification steps. Through an amide reaction, glutathione-functionalized CDs were successfully applied to the selective detection of Co2+, in the linear range from 2.0 × 10−5 to 1.0 × 10−4 mol L−1.
研究领域:
材料科学
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分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Hongzhan Liu,Fangshuo Liu,Kaixiang Ji,Yuriy T. Zholudov,Islam M. Mostafa,Baohua Lou,Wei Zhang,Guobao Xu
9-Mesityl-10-methylacridinium ion (Acr+-Mes) is a donor–acceptor molecule with a much longer lifetime and a higher energy electron transfer excited state than natural photosynthetic reaction centers. Unlike lucigenin with a coplanar geometry, Acr+-Mes has an orthogonal geometry. There is no π conjugation between Acr+ and Mes. Due to its special electron donor–acceptor structure, it does not rely on strong alkalinity to generate an electron transfer state like lucigenin, which makes it possible to achieve chemiluminescence (CL) under weakly alkaline or neutral conditions. In this study, we report Acr+-Mes CL for the first time. Acr+-Mes generates about 400 times stronger CL intensity than lucigenin under neutral conditions (pH = 7) using KHSO5 as the coreactant. Moreover, Co2+ can enhance Acr+-Mes/KHSO5 CL remarkably. Acr+-Mes/KHSO5 CL enables Co2+ detection with a linear range of 0.5–500 nM and a limit of detection of 28 pM (S/N = 3). This method was tested for the detection of Co2+ in lake water, and the standard recovery rate of 96.8–107% was achieved. This study provides a new way to develop efficient CL systems in neutral solutions.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Ziyu Huo,Luoxin Zhuang,Ge Shi,Yanjie He,Zhe Cui,Peng Fu,Minying Liu,Xiaoguang Qiao,Xinchang Pang
Multi-stimuli responsive fluorescence probe could pave the way for monitoring more complex environmental changes. Here we prepared multifunctional nanoparticle Fe 3 O 4 @SiO 2 @P(DMAEMA- co -TPEE), which displayed yolk-shell morphology with well-defined polymer brush. With superparamagnetic Fe 3 O 4 component and pH/temperature dual sensitive PDMAEMA polymer brush, the as prepared nanoparticles (YS-NPs) exhibited as multi-stimuli responsive fluorescence probe for real-time visual monitoring of environmental changes such as magnetic field, temperature and pH. Such YS-NPs could also be applied as a sensitive detector for CO 2 in aqueous solution. Notably, the solution of YS-NPs showed high colloidal stability during the environmental changes, and surface aggregation-induced emission (S-AIE) was proposed for the aggregation of TPE residue on the surface of YS-NPs.
研究领域:
材料科学
·
化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Anqi Jiao,Yiran Zhang,Lin Yang,Xuteng Zhao,Chunping Wu,Ting Chen,Reggie Zhan,Zhen Huang,He Lin
Measuring the CO 2 concentration is the base of carbon accounting which aims to abate the greenhouse gas emission. This paper pays attention to developing sensitive material for CO 2 detection in vehicle exhaust. For this purpose, La 1-x FeO 3-δ nanoparticles with A-site deficiency were synthesized by flame spray pyrolysis (FSP). The dynamic response of the prototype CO 2 sensors was evaluated by checking the gas-mixture with 5%–15% CO 2 . It was observed that the amount of A-site deficiency would obviously affect the performance of the material. La 0.95 FeO 3-δ sensor exhibits the highest response (S = 3.38) and a relatively short response time (t 90 = 114s) among the serial La 1-x FeO 3-δ sensors (x = 0, 0.02, 0.05, 0.07 and 0.1). The improvement of the response might be attributed to the increase of oxygen vacancies and the higher valence of B-site cations caused by the introduction of A-site deficiency. Furthermore, the sensor exhibited good selectivity against NH 3 , NO, NO 2 and CO, as well as good repeatability. However, water vapor is still a disturbance in the response. The response at 40% RH and 80% RH are 2.11 and 1.73, respectively. Finally, the sensing mechanism based on the participation of the oxygen vacancies was discussed.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
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