Fluorescent sensors for detection of mercury: From small molecules to nanoprobes

Huang, Shuai; Cheng, Xiang; Liu, Qian; Bin, Feng; Liu, Xiaohui; Ding, Jipeng; Zhong, Cheng; Liang, Jenn‐Tai; Zeng, Wenbin

doi:10.1016/j.dyepig.2020.109125

Cited by 58 publications

(17 citation statements)

References 108 publications

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“…Up to now, fluorescent probes or fluorescence-based sensors have drawn much more attention due to their simplicity, low cost, high sensitivity, and short analysis time. Various fluorescent sensory materials are currently being developed and designed such as semiconductor quantum dots, metal nanoclusters and organic dye molecules [ 17 , 18 ]. However, these materials are restricted from use by their toxicity, low sensitivity, and high cost.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

Lee

Tang

et al. 2021

Nanomaterials

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Nitrogen and sulfur codoped carbon dots (NSCDs) were synthesized via a one-pot hydrothermal method, and citric acid, ethylenediamine, and methyl blue were used as precursors. The obtained NSCDs were spherical with an average size of 1.86 nm. The fluorescence emission spectra of the NSCDs were excitation independent and emitted blue fluorescence at 440 nm with an excitation wavelength at 350 nm. The quantum yield of the NSCDs was calculated to be 68.0%. The NSCDs could be constructed as fluorescent probes for highly selective and sensitive sensing mercuric (Hg2+) and hypochlorite (ClO−) ions. As the addition of Hg2+ or ClO− ions to the NSCDs, the fluorescence intensity was effectively quenched due to dynamic quenching. Under the optimal conditions, the linear response of the fluorescence intensity ranged from 0.7 μM to 15 μM with a detection limit of 0.54 μM and from 0.3 μM to 5.0 μM with a limit of detection of 0.29 μM for Hg2+ and ClO− ions, respectively. Finally, the proposed method was successfully used for quantifying Hg2+ and ClO− ions in spiked tap water samples.

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Section: Introductionmentioning

confidence: 99%

One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

Lee

Tang

et al. 2021

Nanomaterials

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“…23,24 Lanthanide ions of Ln-MOFs are capable of being excited by various sensitizing chromophores or ligand-metal charge transfer (LMCT). [25][26][27] Therefore, the luminescence performance of Ln-MOF can be effectively regulated by rational design of the interaction between the ligand and metal ions. 28,29 Besides, the special ligand-metal energy transfer, namely the antenna effect (AE), can signicantly enhance the luminescence efficiency of lanthanide ions.…”

Section: Introductionmentioning

confidence: 99%

Rational design of a functionalized metal–organic framework for ratiometric fluorimetric sensing of Hg²⁺ in environmental water

Yang

et al. 2023

Anal. Methods

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“…Donor(D)-acceptor (A) small molecular dyads have attracted considerable interest in chemosensors, fluorescent sensors, and photodetectors related to energy transfer (EnT) and charge transfer processes. − The mechanisms involving photoinduced electron transfer (PET), intramolecular charge transfer (ICT), and fluorescence resonance energy transfer (FRET) in small molecular dyads have been widely studied, revealing their dependence on parameters such as temperature, free energy, molecular orientation, and interdyad distance. − In contrast, these mechanisms in polymeric dyad systems have been rarely explored. Moreover, few reports have investigated the photophysical properties of polymeric dyads by varying the acceptor strength.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, few reports have investigated the photophysical properties of polymeric dyads by varying the acceptor strength. We previously reported copolymers bearing macromolecular donor and acceptor monomers connected via sp 3 and sp 2 linkers, respectively. 10 The structural flexibilities of the linkers were found to affect the efficiencies of energy transfer occurring between the donor and acceptor units.…”

Section: Introductionmentioning

confidence: 99%

Donor-σ-Acceptor Dyad-Based Polymers for Portable Sensors: Controlling Photoinduced Electron Transfer via Tuning the Frontier Molecular Orbital Energies of Acceptors

et al. 2022

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In this study, we synthesized three novel aromatic imide-based conjugated donor(D)-σ-acceptor (A) dyad-based polymers showing different photophysical properties. These D-σ-A dyad-based polymers (e.g., BDTBT-NI, BDTBT-NDI, and BDTBT-PDI) consist of the same conjugated donor main chains (benzodithiophene-bithiophene (BDTBT)) and side chains bearing different imide acceptors (naphthalimide (NI), naphthalene diimide (NDI), or perylenediimide (PDI)). The photophysical and electrochemical characteristics of the three polymers were studied using various methods, including UV–visible absorption, steady-state fluorescence, and time-resolved fluorescence experiments as well as cyclic voltammetry. As the acceptor strength of the side chain was increased, photoinduced electron transfer from the donor backbone to the acceptor side-chain moiety was found to occur more effectively. Among the three polymers, BDTBT-PDI was found to be used as an efficient extractor and portable naked-eye sensing probe for Fe2+ ions; notably, it exhibited a “turn-on” fluorescence response with a detection limit at a picomolar concentration. The BDTBT-PDI:Fe2+ complex was also used for ultrasensitive detection of spermine (with a Stern–Volmer constant of 6.7 × 106 M–1) in urine samples and was established as an efficient portable test kit for the real-time detection of spermine in the vapor released from fermented food samples. Finally, the “on–off” fluorescence behavior of BDTBT-PDI in the presence of Fe2+ and spermine enabled us to develop molecular logic gates using this polymer.

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Fluorescent sensors for detection of mercury: From small molecules to nanoprobes

Cited by 58 publications

References 108 publications

One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

Rational design of a functionalized metal–organic framework for ratiometric fluorimetric sensing of Hg²⁺ in environmental water

Donor-σ-Acceptor Dyad-Based Polymers for Portable Sensors: Controlling Photoinduced Electron Transfer via Tuning the Frontier Molecular Orbital Energies of Acceptors

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Fluorescent sensors for detection of mercury: From small molecules to nanoprobes

Cited by 58 publications

References 108 publications

One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

One-Pot Hydrothermal Synthesis of Carbon Dots as Fluorescent Probes for the Determination of Mercuric and Hypochlorite Ions

Rational design of a functionalized metal–organic framework for ratiometric fluorimetric sensing of Hg2+ in environmental water

Donor-σ-Acceptor Dyad-Based Polymers for Portable Sensors: Controlling Photoinduced Electron Transfer via Tuning the Frontier Molecular Orbital Energies of Acceptors

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Rational design of a functionalized metal–organic framework for ratiometric fluorimetric sensing of Hg²⁺ in environmental water