Chemical sensing failed by aggregation-caused quenching? A case study enables liquid/solid two-phase determination of N2H4

Li, Xiangqian; Li, Mengqing; Qiao, Gongxi; Liu, Qian; Zhou, Zhan; Liu, Wanqiang; Wang, Qianming

doi:10.1016/j.cej.2021.128975

Cited by 29 publications

(7 citation statements)

References 58 publications

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“…CCDC 2108110 and 2108116. For ESI and crystallographic data in CIF or other electronic format see DOI: https://doi.org/10.1039/d2qm00067a tetraphenylethene (TPE), 19,20 triphenylamine, 21,22 cyanostilbene, 23 coumarin, 24 perylene diimides (PDIs), 25 carbazole, 26 and a few others, [27][28][29] so far have been reported to serve as scaffolds for engineering DSEgens. Navigation into the molecular structures reveals the critical importance of the delicate balance between the twisting conformation and rigid conjugation to achieve the DSE.…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, the molecular design principle of DSEgens remains unclear at the current stage and the fundamental understanding of the luminescent mechanism still needs further investigation. 18 Some luminescent cores, such as tetraphenylethene (TPE), 19,20 triphenylamine, 21,22 cyanostilbene, 23 coumarin, 24 perylene diimides (PDIs), 25 carbazole, 26 and a few others, 27–29 so far have been reported to serve as scaffolds for engineering DSEgens. Navigation into the molecular structures reveals the critical importance of the delicate balance between the twisting conformation and rigid conjugation to achieve the DSE.…”

Section: Introductionmentioning

confidence: 99%

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Fusing rigid planar units to engineer twisting molecules as dual-state emitters

Yin

Ding

Yang

et al. 2022

Mater. Chem. Front.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fusing rigid planar units to engineer twisting molecules as dual-state emitters

Yin

Ding

Yang

et al. 2022

Mater. Chem. Front.

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“…With the economic advancement and improvement of people’s quality of life, large numbers of aquatic products have directly entered people’s homes. However, it has been reported that most of the aquatic products are polluted by biological, chemical, and physical contaminants, which enter the human body through food chain, leading to severe hazards to human health. − According to our understanding, the contaminants mainly include heavy-metal ions, , pesticides, , antibiotics, − pathogenic bacteria, , algal toxins, , and others. Among these, algal toxins, especially microcystins (MCs), largely contribute to the accumulating cases of pollution of aquatic products.…”

Section: Introductionmentioning

confidence: 99%

Aptamer–Target Recognition-Promoted Ratiometric Electrochemical Strategy for Evaluating the Microcystin-LR Residue in Fish without Interferences

Zhao

et al. 2022

J. Agric. Food Chem.

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Given the significance of food safety, it is highly urgent to develop a sensitive yet reliable sensor for the practical analysis of algal toxins. As most of the developed sensors are disturbed by interfering substances and the target toxin is detected in a single-signal manner based on the immunoassay technology. Herein, we developed an aptamer-based dual-signal ratiometric electrochemical sensor for the sensitive and accurate analysis of microcystin-LR (MC-LR), using it as a proof-of-concept analyte. Methylene blue-tagged ssDNA (MB-ssDNA) was immobilized at the gold electrode surface accompanied with the absence of ferrocene-tagged ssDNA (Fc-ssDNA), resulting in a high differential pulse voltammetry (DPV) current of MB and a low DPV current of Fc. The recognition of MB-ssDNA by MC-LR stimulated the formation of MC-LR@MB-ssDNA, which induced the removal of MB-ssDNA from the electrode and the exposure of SH-ssDNA, enabling Fc-ssDNA to be captured at the electrode surface via nucleic acid hybridization. In comparison with MC-LR deficiency, the DPV signal of MB dropped along with an improved DPV signal of Fc, contributing to the ratiometric detection of MC-LR, with the limit of detection down to 0.0015 nM. Furthermore, this ratiometric electrochemical sensor was successfully explored to assess the bioaccumulated amount of MC-LR in the liver and meat of fish. The aptamer-based ratiometric strategy to develop an electrochemical MC-LR assay will offer a promising avenue to develop high-performance sensors, and the sensor will find more useful application in MC-LR-related aquatic product safety studies.

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“…Nowadays, the various probes of fluorescent are being investigated and developed to detect N 2 H 4 . Based on the aggregation caused quenching effect [22][23][24], aggregationinduced emission effect [25][26][27], the excited-state intramolecular proton-transfer effect [28][29][30], and photo-induced electron transfer [31,32], probes such as 5-(9-phenyl-9H-carbazol-3yl)thiophene-2-carbaldehyde [22], salicylaldehyde Schiff's base [25], p-TNS [28], and 5chlorothiophene-2-carbonyl chloride [31]. Using these mechanisms to detect N 2 H 4 method is relatively mature, with little room for growth.…”

Section: Introductionmentioning

confidence: 99%

A Novel Turn-On Fluorescent Sensor Based on Sulfur Quantum Dots and MnO2 Nanosheet Architectures for Detection of Hydrazine

Wang

Guo

et al. 2022

Nanomaterials

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In this paper, the SQDs@MnO2 NS as the probe was applied to construct a novel “turn-on” fluorescent sensor for sensitive and selective detection of hydrazine (N2H4). Sulfur quantum dots (SQDs) and MnO2 nanosheets (MnO2 NS) were simply mixed, through the process of adsorption to prepare the architectures of SQDs@MnO2 NS. The fluorescent emissions of SQDs@MnO2 NS play a key role to indicate the state of the sensor. According to the inner filter effect (IFE) mechanism, the state of the sensor at the “off” position, or low emission, under the presence of MnO2 NS, is which the ultraviolet and visible spectrum overlaps with the fluorescence emission spectrum of SQDs. Under the optimal conditions, the emission was gradually recovered with the addition of the N2H4, since the N2H4 as a strong reductant could make the MnO2 NS converted into Mn2+, the state of the sensor at the “on”. Meanwhile, the fluorescent sensor possesses good selectivity and high sensitivity, and the detection concentration of N2H4 with a wide range from 0.1 µM to 10 mM with a detection limit of 0.072 µM. Furthermore, actual samples were successful in detecting certain implications, indicating that the fluorescent sensor possesses the potential application ability to monitor the N2H4 in the water.

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Chemical sensing failed by aggregation-caused quenching? A case study enables liquid/solid two-phase determination of N2H4

Cited by 29 publications

References 58 publications

Fusing rigid planar units to engineer twisting molecules as dual-state emitters

Fusing rigid planar units to engineer twisting molecules as dual-state emitters

Aptamer–Target Recognition-Promoted Ratiometric Electrochemical Strategy for Evaluating the Microcystin-LR Residue in Fish without Interferences

A Novel Turn-On Fluorescent Sensor Based on Sulfur Quantum Dots and MnO2 Nanosheet Architectures for Detection of Hydrazine

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