Rapid analysis of quinoxalines in feeds by a fluorescence sensor based on tetraphenylmethane porous organic framework membrane

Lu, Zhenyu; Zhong, Yanhui; Li, Gongke; Hu, Yufei

doi:10.1016/j.snb.2021.131350

Cited by 11 publications

(7 citation statements)

References 45 publications

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“…It could be seen that the time-resolved fluorescence spectra of the dual-mode probes showed similar profile characteristics before and after the addition of Fe 3+ standard solution. The fluorescence lifetimes of dual-mode probes and the mixture of dual-mode probes and Fe 3+ were very close to each other and were calculated to be 9.17 and 9.12 ns, respectively, which was consistent with the static quenching mechanism. , Thus, the results showed that the fluorescence quenching mode of the dual-mode probes caused by Fe 3+ was static quenching.…”

Section: Resultssupporting

confidence: 64%

“…The fluorescence lifetimes of dual-mode probes and the mixture of dual-mode probes and Fe 3+ were very close to each other and were calculated to be 9.17 and 9.12 ns, respectively, which was consistent with the static quenching mechanism. 53,54 Thus, the results showed that the fluorescence quenching mode of the dual-mode probes caused by Fe 3+ was static quenching.…”

Section: Study Of Comsol Simulation and Enhancedmentioning

confidence: 90%

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Contractile Hairpin DNA-Mediated Dual-Mode Strategy for Simultaneous Quantification of Lactoferrin and Iron Ion by Surface-Enhanced Raman Scattering and Fluorescence Analysis

Huang

Zhang

et al. 2023

Anal. Chem.

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DNA-mediated self-assembly technology with good sensitivity and affinity ability has been rapidly developed in the field of probe sensing. The efficient and accurate quantification of lactoferrin (Lac) and iron ions (Fe 3+ ) in human serum and milk samples by the probe sensing method can provide useful clues for human health and early diagnosis of anemia. In this paper, contractile hairpin DNAmediated dual-mode probes of Fe 3 O 4 /Ag-ZIF8/graphitic quantum dot (Fe 3 O 4 /Ag-ZIF8/GQD) NPs were prepared to realize the simultaneous quantification of Lac by surface-enhanced Raman scattering (SERS) and Fe 3+ by fluorescence (FL). In the presence of targets, these dual-mode probes would be triggered by the recognition of aptamer and release GQDs to produce FL response. Meanwhile, the complementary DNA began to shrink and form a new hairpin structure on the surface of Fe 3 O 4 /Ag, which produced hot spots and generated a good SERS response. Thus, the proposed dual-mode analytical strategy possessed excellent selectivity, sensitivity, and accuracy due to the dual-mode switchable signals from "off" to "on" in SERS mode and from "on" to "off" in FL mode. Under the optimized conditions, a good linear range was obtained in the range of 0.5−100.0 μg/ L for Lac and 0.01−5.0 μmol/L for Fe 3+ and with detection limits of 0.14 μg/L and 3.8 nmol/L, respectively. Finally, the contractile hairpin DNA-mediated SERS-FL dual-mode probes were successfully applied in the simultaneous quantification of iron ion and Lac in human serum and milk samples.

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Section: Resultssupporting

confidence: 64%

Section: Study Of Comsol Simulation and Enhancedmentioning

confidence: 90%

Contractile Hairpin DNA-Mediated Dual-Mode Strategy for Simultaneous Quantification of Lactoferrin and Iron Ion by Surface-Enhanced Raman Scattering and Fluorescence Analysis

Huang

Zhang

et al. 2023

Anal. Chem.

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“…The types of POPs mainly include covalent organic frameworks (COFs), [115][116][117] covalent triazine organic frameworks (CTFs) [118][119][120] and porous organic frameworks (POFs). [121][122][123] In this part, we summarize the recent applications and research progress of sulfur-containing polymers based on POP materials in Li-S batteries.…”

Section: Polymers Based On Organic Frameworkmentioning

confidence: 99%

Molecular structure-controlled synthesis of sulfur-containing polymers for rechargeable Li–S batteries

Cheng

Chen

et al. 2022

J. Mater. Chem. A

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“…It is therefore essential to improve PQ measurement methods. A fluorescence-based method is a simple alternative, since it requires less equipment for quick real-time detection with excellent sensitivity and selectivity. , Fluorescence sensor materials have been extensively used for the detection of chemicals such as metal ions, − anions, pH, , gas, and small organic molecules, , due to their simplicity, low cost, portability, and high sensitivity and selectivity. Metal–organic frameworks (MOFs) are luminescent materials that have attracted extensive attention due to their large surface area, tunable pore size, and facile modification of the pore surface. − Among them, fluorescence sensors based on lanthanide-MOFs (Ln-MOFs) have gained more and more attention.…”

Section: Introductionmentioning

confidence: 99%

A Water-Stable Lanthanide-Based MOF as a Highly Sensitive Sensor for the Selective Detection of Paraquat in Agricultural Products

Wiwasuku

Chuaephon

Habarakada

et al. 2022

ACS Sustainable Chem. Eng.

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The toxic agrochemical contamination of food and the environment is one of the most pressing concerns for human health and environmental sustainability. In this work, a water-stable 3D lanthanidebased MOF, [Tb 2 (H 2 btec)(btec)(H 2 O)]•4H 2 O (Tb-MOF) has been demonstrated as a turn-off luminescent sensor for the detection of poisonous paraquat. The ligand 1,2,4,5-benzenetetracarboxylic acid (H 4 btec) was incorporated into Tb-MOF to act as a detection recognition site for a selective interaction with paraquat, resulting in a dramatic luminescence quenching. The obtained Tb-MOF not only is water stable but also tolerates acidic and basic conditions. On top of that, the rapid detection of paraquat in aqueous solution with high sensitivity and selectivity can be obtained even in the presence of common contaminants in the environment. The linear range for paraquat detection was observed in the concentration range from 0 to 50 μM with a low limit of detection of 2.84 μM and a high quenching constant of 3.95 × 10 4 M −1 . Tb-MOF can be applied to detect paraquat in water and agricultural samples with satisfactory recoveries from 85.59 to 105.20%. To gain insights into the molecular recognition, time-dependent density functional theory (TD-DFT) calculations were conducted to reveal the specific interactions between paraquat and the ligand in the backbone structure of the MOF. The quenching mechanism is attributed to a photoinduced electron transfer (PET) from the MOF to paraquat and the competitive absorption of excitation energy by paraquat. To demonstrate a practical implementation of the MOFbased sensor, a PVA/Tb-MOF@paper strip was fabricated, which can visually detect paraquat under irradiation with a UV lamp. These results indicate that Tb-MOF can be used as a potential sensor for the practical detection of paraquat in the environment and agricultural products.

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Rapid analysis of quinoxalines in feeds by a fluorescence sensor based on tetraphenylmethane porous organic framework membrane

Cited by 11 publications

References 45 publications

Contractile Hairpin DNA-Mediated Dual-Mode Strategy for Simultaneous Quantification of Lactoferrin and Iron Ion by Surface-Enhanced Raman Scattering and Fluorescence Analysis

Contractile Hairpin DNA-Mediated Dual-Mode Strategy for Simultaneous Quantification of Lactoferrin and Iron Ion by Surface-Enhanced Raman Scattering and Fluorescence Analysis

Molecular structure-controlled synthesis of sulfur-containing polymers for rechargeable Li–S batteries

A Water-Stable Lanthanide-Based MOF as a Highly Sensitive Sensor for the Selective Detection of Paraquat in Agricultural Products

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