Lanthanide molecular model triggers sequential sensing performance

Qiao, Gongxi; Lai, Zhijun; Gao, Jinwei; Liu, Wanqiang; Zheng, Yufeng

doi:10.1016/j.molliq.2020.113344

Cited by 7 publications

(4 citation statements)

References 42 publications

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“…The FT-IR spectra of PEI and PDA–PEI nanodots showed two weak peaks at 2942 and 2819 cm –1 , which were attributed to the C–H stretching vibration of the −CH 2 – spacer in PEI (Figure B) . A new absorption band at 1650 cm –1 was observed in the PDA–PEI nanodots, which was ascribed to the CN stretching vibration in the nanodot skeleton, which stemmed from the Michael addition reactions between the −NH 2 or PEI and the double bonds in DA. , …”

Section: Resultsmentioning

confidence: 96%

“…The FT-IR spectra of PEI and PDA−PEI nanodots showed two weak peaks at 2942 and 2819 cm −1 , which were attributed to the C−H stretching vibration of the −CH 2 − spacer in PEI (Figure 2B). 36 A new absorption band at 1650 cm −1 was observed in the PDA−PEI nanodots, which was ascribed to the Fluorescence Quenching Efficiency of PDA−PEI Nanodots to Other Fluorophores. Because of the wide light absorption nature, PDA has been well demonstrated to be an excellent quencher to a wide range of fluorophores and has been widely used as the nanoplatform for fabricating highly sensitive fluorescence probes.…”

Section: Analyticalmentioning

confidence: 95%

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PDA–PEI-Copolymerized Nanodots with Tailorable Fluorescence Emission and Quenching Properties for the Sensitive Ratiometric Fluorescence Sensing of miRNA in Serum

Deng

Zang

et al. 2022

Anal. Chem.

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Dopamine and polyethyleneimine (PEI) copolymerized nanodots (PDA–PEI nanodots) with both fluorescence emission and quenching features were synthesized by a simple one-step reaction at room temperature. By adjusting the dopamine and PEI ratio as well as the chain length of PEI, the fluorescence emission and quenching properties of PDA–PEI nanodots can be controlled well. Under optimal conditions, the nanodots showed strong green fluorescence emission with an absolute quantum yield of 1–2% and a quenching efficiency of more than 99% to several fluorophores with emission wavelengths ranging from blue to red light regions. The nanodots with a large number of functional groups also showed strong affinity to nucleic acid strands, excellent solubility in aqueous solution, long-term stability, and uniform size distribution. Integrating these attractive features with the specific enzymatic digestion reaction of the DSN enzyme, a highly sensitive ratiometric fluorescence nanoprobe for miRNA analysis was developed. Aminomethylcoumarin acetate (AMCA), which possesses the same excitation wavelength but a well-resolved blue fluorescence emission with PDA–PEI nanodots, was selected as the signal-reporting unit for capture probe labeling, while the inherent green fluorescence of PDA–PEI nanodots served as the reference. According to the ratiometric fluorescence signal, the ratiometric fluorescence nanoprobes showed high sensitivity and good accuracy for the miRNA assay. Because of the high and universal quenching efficiency, stable fluorescence emission, easily assembled interface, and uniform morphology, the nanodots may have great application prospects to serve as a universal nanoplatform for the fabrication of ratiometric fluorescence nanoprobes.

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Section: Resultsmentioning

confidence: 96%

Section: Analyticalmentioning

confidence: 95%

PDA–PEI-Copolymerized Nanodots with Tailorable Fluorescence Emission and Quenching Properties for the Sensitive Ratiometric Fluorescence Sensing of miRNA in Serum

Deng

Zang

et al. 2022

Anal. Chem.

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“…Due to the importance of simultaneous detection of multiple analytes in different matrices, synthesis and design of biochemical/chemical probes for sequential multi-component detection of analytes have recently drawn great attention 9 , 16 , 21 , 22 . Generally, these sensors could respond to multiple ions 23 or small molecules 24 , even some of them can sequentially detect ions or molecules 25 .…”

Section: Introductionmentioning

confidence: 99%

Catalytic nanozyme Zn/Cl-doped carbon quantum dots as ratiometric fluorescent probe for sequential on-off-on detection of riboflavin, Cu2+ and thiamine

Dadkhah

Mehdinia

Jabbari

et al. 2022

Sci Rep

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A novel metal-doped Zn/Cl carbon quantum dots (Zn/Cl-CQDs) was developed successfully as ratiometric fluorescent probes for the sequential on-off-on detection of riboflavin, Cu2+ ion and thiamine. The excellent catalytic performance of the Zn/Cl-CQDs nanozyme serves as an ideal platform for sensitive detection of thiamine. Due to the addition of riboflavin to the Zn/Cl-CQDs, the blue emission peak of Zn/Cl-CQDs at 440 nm remains unaffected and used as an internal reference approach, while the green emission peak of riboflavin at 520 nm appeared and increased remarkably. Following the presence of Cu2+, a quenching blue fluorescence signal of Zn/Cl-CQDs was observed which resulted in consequent fluorescent ‘turn-off’ response toward Cu2+ ion. Finally, upon the addition of thiamine to the above solution under alkaline condition, the blue emission of Zn/Cl-CQDs was gradually recovered. The prepared Zn/Cl-CQDs could act as a nanozyme catalyst for directly catalyzing the oxidation of non-fluorescent substrate of thiamine to produce highly fluorescent substrate of thiochrome. As a result, the blue fluorescence emission peak at 440 nm was recovered. Eventually, the sequential detection properties of ratiometric probes for riboflavin, Cu2+ ion and thiamine were successfully applied in VB2 tablets, drinking water and VB1 tablet with good recoveries of 96.21%, 98.25% and 98.44%, respectively.

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“…Assorted chemical and biological techniques including high‐performance liquid chromatography (HPLC), [ 43 ] surface‐enhanced Raman scattering, [ 44 ] luminescence detection, [ 40,45–53 ] electrochemical detection, [ 54 ] immunoassays, [ 34 ] and polymerase chain reaction (PCR), [ 55 ] can be used for the determination of bacterial spores. In particular, lanthanide luminescence has become a powerful tool for sensing DPA due to its selectivity, sensitivity, straightforward and quick detection, and low cost [for europium (Eu) based sensors see references [ 40,48,50,51,56–72 ] ; for other lanthanide based DPA sensors see references [ 41,45,47,54,73–87 ] ; for other DPA sensors see references. [ 88–92 ]…”

Section: Introductionmentioning

confidence: 99%

Eu(III)–DO3A and BODIPY dyad as a chemosensor for anthrax biomarker

Alp

Algı

2021

Luminescence

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The sensitive and selective determination of Bacillus anthracis spores before the infection is vital for human health and safety. Dipicolinic acid (DPA) is an excellent biomarker due to its presence in the nucleus of bacterial spores at high concentrations (up to 1 M, about 15% dry weight). In the present work, a new molecular chemosensor 1, based on europium(III)–DO3A and BODIPY dyad, is developed to detect DPA in phosphate‐buffered saline (PBS) buffered solution and tap water samples. Also, 1 can be used as a ratiometric optical chemosensor to track DPA.

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Lanthanide molecular model triggers sequential sensing performance

Cited by 7 publications

References 42 publications

PDA–PEI-Copolymerized Nanodots with Tailorable Fluorescence Emission and Quenching Properties for the Sensitive Ratiometric Fluorescence Sensing of miRNA in Serum

PDA–PEI-Copolymerized Nanodots with Tailorable Fluorescence Emission and Quenching Properties for the Sensitive Ratiometric Fluorescence Sensing of miRNA in Serum

Catalytic nanozyme Zn/Cl-doped carbon quantum dots as ratiometric fluorescent probe for sequential on-off-on detection of riboflavin, Cu2+ and thiamine

Eu(III)–DO3A and BODIPY dyad as a chemosensor for anthrax biomarker

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