Photoresponsive oxidase-like phosphorescent carbon dots in colorimetric Hg2+ detection

X, Sun; Luo, Shiqing; Zhang, Lifang; Miao, Yanming; Yan, Guiqin

doi:10.1016/j.arabjc.2023.104614

Cited by 9 publications

(2 citation statements)

References 56 publications

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“…The light-responsive catalytic activity of CDs has been employed for the detection of ions, L-ascorbic acid, and other substances based on the colorimetric method. For example, Sun et al (2023) synthesized P-NCDs by hydrothermal method using triethylenetetramine hexaacetic acid as the precursor, which can convert oxygen in solution to singlet oxygen ( 1 O 2 ) under UV excitation at 365 nm, oxidizing TMB and gradually turning blue. Cysteine inhibited the catalytic activity of the P-NCDs, while its selective complexes with Hg 2+ restored P-NCDs’ catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

“…Cysteine inhibited the catalytic activity of the P-NCDs, while its selective complexes with Hg 2+ restored P-NCDs’ catalytic activity. The good linear range of detection at Hg 2+ concentrations of 0.01–14 mM with a LOD of 3.1 nM ( Sun et al, 2023 ). Li Y R et al (2023) synthesized carbon dots by microwave-assisted method and the CDs can generate hydroxyl radicals to oxidize TMB under light irradiation.…”

Section: Introductionmentioning

confidence: 99%

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Carbon dots with light-responsive oxidase-like activity for colorimetric detection of dopamine and the catalytic mechanism

Jia,

Liu,

Cheng

et al. 2023

Front. Chem.

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Introduction: Dopamine is one of the most significant neurotransmitters and plays an important role in the management of cognitive functions such as learning, memory, and behavior. The disorder of dopamine is associated with many major mental diseases. It is necessary to develop selective methods for the detection of dopamine.Methods: In this work, carbon dots (CDs) were synthesized by a solvothermal route using glutathione, L-histidine, and formamide as sources.Results: Under light irradiation, The CDs convert dissolved oxygen to singlet oxygen (1O2), which could oxidize TMB. When reduced dopamine was present, it suppressed the catalysis of CDs, then the absorption of the CDs-coupled TMB complex at 652 nm was diminished. Furthermore, it was revealed that the surface groups including hydroxyl, amino, carbonyl, and carboxyl groups of CDs were related to their light-responsive catalytic activity by surface modification. In the range of 0.5-15 μM, the CDs could afford a LOD of 0.25 μM for dopamine detection with fine linearity, also showing good selectivity.Discussion: The results from fetal bovine serum indicated the good applicability of the CDs in the determination of dopamine.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%