Selective and sensitive ratiometric detection of Hg2+ in 100% aqueous solution with triazole-based dansyl probe

Neupane, Lok Nath; Kim, Joung Min; Lohani, Chuda Raj; Lee, Keun‐Hyeung

doi:10.1039/c2jm15664d

Cited by 119 publications

(40 citation statements)

References 66 publications

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“…Therefore, the electron transfer from Au 25 NCs to Hg 2+ ions can occur spontaneously when the Hg 2+ is binding to the NCs. Sensing the Hg 2+ ions had also accomplished by fluorescent molecules, QDs and carbon dots (C‐Dot) due to facilitating non‐radiative electron/hole recombination through an effective electron transfer process . It should be noted that the relative amplitude of the DF decreases with increasing Hg 2+ concentrations, although the decay rate is found to remain constant.…”

Section: Resultsmentioning

confidence: 99%

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au₂₅@BSA Nanoclusters

Wen

Toh

et al. 2013

Part & Part Syst Charact

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The metallophilic bond is a weak interaction between closed‐shell ions and has been widely used a probe for various sensing of toxic chemicals for environmental safety concerns. Here, the interaction between Au nanoclusters (NCs) and metallic ions (mercury (Hg2+) and copper (Cu2+) ions) is explored using steady‐state and time‐resolved luminescence and transient absorption measurements. For Hg2+ ions, the delayed fluorescence (DF) of bovine serum albumin (BSA) protected Au25 (Au25@BSA) NCs is quenched via an effective triplet state electron transfer through the metallophilic bond. However, the Cu2+ ions do not alter the DF in Au25@BSA NCs because of the absence of the metallophilic interaction. Furthermore, for Au8@BSA and Au10@histidine, in which there are no Au+ ions on the surface, the fluorescence is not quenched by Hg2+ ions. Such a novel triplet electron transfer process through metallophilic bonds are observed and reported for the first time. The reduction of the reverse intersystem crossing is the crucial for Hg2+ ion sensing in the fluorescent Au25@BSA NCs.

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Section: Resultsmentioning

confidence: 99%

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au₂₅@BSA Nanoclusters

Wen

Toh

et al. 2013

Part & Part Syst Charact

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“…8), and a linear regression equation of DF¼FeF 0 ¼ 3911.8Ce 697.8 (where C is the concentration of Hg 2þ ions, F and F 0 represents the fluorescence intensity with and without Hg 2þ ions). The detection limit can be calculated by the formula [15,45,46]:…”

Section: Detection Of Hg 2þ Ionsmentioning

confidence: 99%

Conjugated polymer and spirolactam rhodamine-B derivative co-functionalized mesoporous silica nanoparticles as the scaffold for the FRET-based ratiometric sensing of mercury (II) ions

Feng

Sha

et al. 2015

Microporous and Mesoporous Materials

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“…25,26 In fact, various methods for the sensitive and selective detection of the heavy metal ions have been reported. [28][29][30][31][32] For example, the performance of a conventional and unqualified rhodamine-based fluorescent Hg 2+ sensor was greatly improved by Tian and co-workers via the introduction of triazole structures. [28][29][30][31][32] For example, the performance of a conventional and unqualified rhodamine-based fluorescent Hg 2+ sensor was greatly improved by Tian and co-workers via the introduction of triazole structures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and sensing applications of a new fluorescent derivative of cholesterol

et al. 2016

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A fluorescent 4-chloro-7-nitro-1,2,3-benzoxadiazole (NBD) derivative of cholesterol (CTN) was designed and synthesized. The compound forms a 1 : 1 non-fluorescent complex with Hg 2+ in a solvent mixture of water and ethanol. Based on this discovery, a detection method with a detection limit (DL) of B0.08 mM for Hg 2+ was developed. The presence of other commonly found metal ions has little effect on the detection. Though Fe 2+ and Cu 2+ have some interference, it could be avoided by a simple oxidation or reduction procedure. Further studies revealed that the complex can be used for the turn-on detection of some organophosphorus pesticides (OPs), such as DDVP, glyphosate, chlorpyrifos, diazinon and phoxim, either in solution or film state. The DLs for the five OPs are 0.015, 0.018, 0.087, 0.098 and 0.113 mg mL À1 in solution, respectively. In addition, the compound as developed is interesting and attractive because it can sense the heavy metal ion and the OPs in a fast and sensitive manner. It is therefore believed that the developed method possesses the potential to be used for rapid on-site detection of hazardous chemicals.

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Selective and sensitive ratiometric detection of Hg2+ in 100% aqueous solution with triazole-based dansyl probe

Cited by 119 publications

References 66 publications

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au₂₅@BSA Nanoclusters

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au₂₅@BSA Nanoclusters

Conjugated polymer and spirolactam rhodamine-B derivative co-functionalized mesoporous silica nanoparticles as the scaffold for the FRET-based ratiometric sensing of mercury (II) ions

Synthesis and sensing applications of a new fluorescent derivative of cholesterol

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Selective and sensitive ratiometric detection of Hg2+ in 100% aqueous solution with triazole-based dansyl probe

Cited by 119 publications

References 66 publications

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au25@BSA Nanoclusters

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au25@BSA Nanoclusters

Conjugated polymer and spirolactam rhodamine-B derivative co-functionalized mesoporous silica nanoparticles as the scaffold for the FRET-based ratiometric sensing of mercury (II) ions

Synthesis and sensing applications of a new fluorescent derivative of cholesterol

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Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au₂₅@BSA Nanoclusters

Metallophilic Bond‐Induced Quenching of Delayed Fluorescence in Au₂₅@BSA Nanoclusters