A ratiometric fluorescent probe based on PCN-224 for rapid and ultrasensitive detection of copper ions

Zhou, Wenjie; Hu, Zhe; Wei, Jinxin; Lu, Hanxu; Dai, Hanqing; Zhao, Jinchan; Zhang, Wanlu; Guo, Ruiqian

doi:10.1016/j.coco.2022.101221

Cited by 19 publications

(8 citation statements)

References 42 publications

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“…The lone pair electrons of the nitrogen atom shown a good affinity for Cu 2+ , which could be attributed to the behavior of the characteristic pair of nitrogen atom and Cu 2+ . 60 The quenching constant is an important means to measure fluorescent sensitivity. The quenching constant was an important means of determining fluorescent sensitivity, which were calculated according to Stern–Volmer equation (eqn (2)).…”

Section: Resultsmentioning

confidence: 99%

Ganoderma lucidum bran-derived blue-emissive and green-emissive carbon dots for detection of copper ions

Wang

Lan

et al. 2023

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Ganoderma lucidum bran-derived blue-emissive and green-emissive carbon dots for detection of copper ions

Wang

Lan

et al. 2023

RSC Adv.

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“…3C), showing the excellent performance in detecting Cu 2+ with a LOD as low as 0.07 nM. Similarly, Zhou et al 50 synthesized CDs-PCN-224 fluorescent probes for monitoring Cu 2+ with a LOD of 44 nM. Furthermore, Ma et al 51 reported an Ag( i )-Ln( iii )-MOF for selective Cu 2+ detection.…”

Section: Target Recognition Based On Fluorescent Nanomaterialsmentioning

confidence: 97%

Nanomaterials for molecular recognition: specific adsorption and regulation of nanozyme activities

Wang

et al. 2023

Mater. Chem. Front.

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“…24 Additionally, Zhao and coworkers developed a ratiometric fluorescent probe based on encapsulating CDs into PCN-224 to monitor Cu 2+ levels. 25 At the same time, silver nanoparticles (AgNPs) that are typically only a few nanometers in diameter can be grown in situ on fluorescent MOFs used as carriers. 26 It is easily disrupted by hydrogen peroxide (H 2 O 2 ), which enables detection of the enzyme-catalyzed generated H 2 O 2 reaction with high specificity and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al synthesized hyaluronic acid (HA)-modified CeO 2 -embedded PCN-224 nanoparticles to enhance photodynamic therapy to achieve targeted treatment . Additionally, Zhao and co-workers developed a ratiometric fluorescent probe based on encapsulating CDs into PCN-224 to monitor Cu 2+ levels . At the same time, silver nanoparticles (AgNPs) that are typically only a few nanometers in diameter can be grown in situ on fluorescent MOFs used as carriers .…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive Fluorescence Platform Based on AgNPs In Situ-Incorporated Zr-MOFs for the Detection of Organophosphorus Pesticides

Wang,

Pan,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Organophosphorus pesticides (OPPs) are extensively used in agricultural production, and the contamination caused by their residues has raised significant concerns regarding potential threats to human health. Herein, a novel fluorescence nanoprobe based on an enzyme-mediated silver nanoparticle-modified metal organic framework (AgNPs@PCN-224) was successfully prepared for the rapid detection of OPPs. Initially, AgNPs@PCN-224 were synthesized by reducing silver nitrate (AgNO3) using sodium borohydride (NaBH4) embedded into luminescent PCN-224. This triggered the inner filter effect, leading to fluorescence quenching. Meanwhile, under the catalysis of acetylcholinesterase (AChE) and choline oxidase (CHO), acetylcholine (ATCh) was decomposed to hydrogen peroxide (H2O2), which could destroy AgNPs to form Ag+ released from PCN-224 for fluorescence recovery. Instead, fenitrothion, an OPP, inhibited AChE activity, allowing the quenched fluorescence to be reactivated. Under the current optimum conditions, the fluorescence intensity had a good correlation (Y = −728.5370X + 2178.4248, R 2 = 0.9869) over a dynamic range of fenitrothion concentrations from 0.1 to 500 ng/mL, with an LOD of 0.037 ng/mL. In addition, the anti-interference ability and robustness of the proposed sensor was verified for the monitoring of fenitrothion in tea with recoveries of 87.67–103.72% and the relative standard deviations (RSD) < 5.43%, indicating that the system has excellent prospects for OPP determination in practical applications. Furthermore, this work provides a universal platform for screening other enzyme inhibitors to detect OPPs.

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A ratiometric fluorescent probe based on PCN-224 for rapid and ultrasensitive detection of copper ions

Cited by 19 publications

References 42 publications

Ganoderma lucidum bran-derived blue-emissive and green-emissive carbon dots for detection of copper ions

Ganoderma lucidum bran-derived blue-emissive and green-emissive carbon dots for detection of copper ions

Nanomaterials for molecular recognition: specific adsorption and regulation of nanozyme activities

Ultrasensitive Fluorescence Platform Based on AgNPs In Situ-Incorporated Zr-MOFs for the Detection of Organophosphorus Pesticides

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