2022
DOI: 10.3390/bios12090745
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Detection of Pb2+ in Tea Using Aptamer Labeled with AIEgen Nanospheres Based on MOFs Sensors

Abstract: Tea is an important economic crop and health beverage in China. The presence of heavy metal ions in tea poses a significant threat to public health. Here, we prepared an aptamer biosensor labelled with AIEgen nanospheres to detect Pb2+ in tea. The dsDNA modified by amino and phosphoric acid was combined with the carboxylated AIEgen NPs to form AIEgen-DNA with a fluorescence group, which was then fixed to the surface of Zr-MOFs to quench the fluorescence of AIEgen NPs. At the same time, PEG was added to remove … Show more

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Cited by 13 publications
(5 citation statements)
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“…10A). 140 Such a nanocomposite exhibited high sensitivity and selectivity to Pb 2+ , holding great promise for applications in food safety and environmental analysis. These works offered an efficient strategy for the target-responsive and controllable assembly of MOF nanocomposites, holding great promise for applications in biosensing and stimuli-induced therapy.…”
Section: Surface Ligand-assisted Synthesis Of Mof Nanocompositesmentioning
confidence: 99%
See 1 more Smart Citation
“…10A). 140 Such a nanocomposite exhibited high sensitivity and selectivity to Pb 2+ , holding great promise for applications in food safety and environmental analysis. These works offered an efficient strategy for the target-responsive and controllable assembly of MOF nanocomposites, holding great promise for applications in biosensing and stimuli-induced therapy.…”
Section: Surface Ligand-assisted Synthesis Of Mof Nanocompositesmentioning
confidence: 99%
“…For example, Gao et al utilized Pb 2+ -responsive double-stranded DNA to assemble a MOF/ AIEgen nanoprobe for the highly sensitive detection of Pb 2+ . 140 MOFs can quench the fluorescence of AIEgen through FRET. However, in the presence of Pb 2+ , the double-stranded DNA would be cleaved, and consequently, MOFs and AIEgen would separate, leading to the fluorescence recovery of AIEgen.…”
Section: Biosensing and Bioimagingmentioning
confidence: 99%
“…Copyright 2020, RSC advances. ( d ) Schematic diagram of AIEgen nanosphere-labeled aptamer combined with Zr-MOFs for detection of Pb 2+ , TEM image of AIEgen NPs and TEM image of MOF [ 67 ]. Reprinted with permission [ 67 ].…”
Section: Figures and Schemementioning
confidence: 99%
“…To luminesce, AIEgen NPS and certain DNA sequences were extracted from the surface of Zr-MOFs. The concentration of Pb 2+ was determined by comparing the fluorescence changes before and after the addition of Pb 2+ [67]. Aptamer/MCH/AuNPs/GCE [64].…”
Section: Leadmentioning
confidence: 99%
“…These catalysts offer several advantages, including high efficiency, high selectivity, easy synthesis, and customizable structure. 8 At present, scientists have proficiently employed DNA molecules to fabricate diverse biomimetic catalysts, including DNAzyme, 9 DNA metal–organic frameworks, 10 and DNA-based artificial metalloenzymes. 8 DNA-based artificial metalloenzymes are promising artificial catalysts that combine the advantages of DNA and metal complex catalysts, and they have a wide range of applications in biomedical and chemical synthesis, etc.…”
Section: Introductionmentioning
confidence: 99%