A Near‐Infrared‐Fluorescent Chemodosimeter for Mercuric Ion Based on an Expanded Porphyrin

Zhu, Xunjin; Fu, Shi Tao; Wong, Wai‐Kwok; Guo, Jian

doi:10.1002/anie.200600248

Cited by 247 publications

(89 citation statements)

References 55 publications

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“…A number of fluorescence-based probes and sensors for detection of Hg(II) have been reported. [2][3][4][5][6][7][8][9][10] However, many fluorescent small-molecule-based Hg(II) sensors presented to date are quenched upon Hg(II) coordination, often rely on an irreversible Hg(II)-dependent chemical reaction to give fluorescence turn-on, and/or require organic solvent systems. Most of these sensors display drawbacks in terms of actual applicability such as the lack of water solubility, cross-sensitivity toward other metal ions, weak fluorescence enhancement factor, and short emission wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

et al. 2008

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Contamination of the environment with heavy metal ions has been an important concern throughout the world for decades. Driven by the need to detect trace amounts of mercury in environmental samples, this article demonstrates for the first time that nonlinear optical (NLO) properties of MPA-HCys-PDCA-modified gold nanoparticles can be used for rapid, easy and reliable screening of Hg(II) ions in aqueous solution, with high sensitivity (5 ppb) and selectivity over competing analytes. The hyper Rayleigh scattering (HRS) intensity increases 10 times after the addition of 20 ppm Hg 2+ ions to modified gold nanoparticle solution. The mechanism for HRS intensity change has been discussed in detail using particle size-dependent NLO properties as well as a two-state model. Our results show that the HRS assay for monitoring Hg(II) ions using MPAHCys-PDCA-modified gold nanoparticles has excellent selectivity over alkali, alkaline earth (Li + , Na + , K + , Mg 2+ , Ca 2+ ), and transition heavy metal ions (Pb 2+ , Pb + , Mn 2+ , Fe 2+ , Cu 2+ , Ni 2+ , Zn 2+ , Cd 2+ ).

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Section: Introductionmentioning

confidence: 99%

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

et al. 2008

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“…Therefore, determination of trace amounts of mercury in environmental samples is of great interest due to increasing public concern about environmental pollution and their high toxicity and accumulative and persistent character in the environment and living organisms. In recent years, several fluorescent sensors have been developed for the determination of Hg 2+ [15][16][17]. Shamsipur et al [18] have prepared a Hg 2+ fluorescence sensor by incorporating 1-(dansylamidopropyl)-1-aza-4,10-dithia-7-oxacyclododecane as a neutral Hg 2+ -selective fluoroionophore in the plasticized PVC membrane containing potassium tetrakis(pchlorophenyl) borate as a liphophilic anionic additive.…”

Section: Introductionmentioning

confidence: 99%

An optical sensor for mercury ion based on the fluorescence quenching of tetra(p-dimethylaminophenyl)porphyrin

Yang

Jiang

Shen

et al. 2009

Analytica Chimica Acta

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a b s t r a c tAn optical sensor for mercury ion (Hg 2+ ), based on quenching the fluorescence of the sensing reagent porphyrin immobilized in plasticized poly(vinyl chloride) (PVC) membrane, has been developed. The responses to mercury ion were compared for the sensors modified with three porphyrin compounds including 5,10,15,20-tetraphenylporphyrin (TPP), tetra(p-dimethylaminophenyl)porphyrin (TDMAPP) and tetra(N-phenylpyrazole) porphyrin (TPPP). Among them, TDMAPP showed the most remarkable response to Hg 2+ . The drastic decrease of the TDMAPP fluorescence intensity was attributed to the formation of a complex between TDMAPP and Hg 2+ , which has been utilized as the fabrication basis of a Hg 2+ -sensitive fluorescence sensor. The analytical performance characteristics of the TDMAPP modified sensor was investigated. The response mechanism, especially involving the response difference of three porphyrin compounds, was discussed in detail. The sensor can be applied to the quantification of Hg 2+ with a linear range covering from 4.0 × 10 −8 mol L −1 to 4.0 × 10 −6 mol L −1 . The limit of detection was 8.0 × 10 −9 mol L −1 . The sensor exhibited excellent reproducibility, reversibility and selectivity. Also, the TDMAPP-based sensor was successfully used for the determination of Hg 2+ in environmental water samples.

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“…Therefore, there is an ever-growing demand to detect mercury contaminants in drinking water, food, air, and soil. A variety of optical methods [5][6][7][8][9] have been developed for the detection of mercury, however, most fluorescent sensors for Hg 2+ ions are based on small organic molecules [10][11][12][13] that usually work in organic media. [14,15] Many of these small synthetic molecules lack water solubility, and although metal ions are relatively easy to chelate in organic solvents it is rather difficult to directly recognize them in aqueous solutions because of their strong hydration.…”

mentioning

confidence: 99%

Optical Detection of Mercury(II) in Aqueous Solutions by Using Conjugated Polymers and Label‐Free Oligonucleotides

et al. 2007

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A conjugated‐polymer‐based “mix‐and‐detect” optical sensor for mercury ions is fabricated by using a water‐soluble poly[3‐(3′‐N,N,N‐triethylamino‐1′‐propyloxy)‐4‐methyl‐2,5‐thiophene hydrochloride] (PMNT) and a label‐free, mercury‐specific oligonucleotide (MSO) probe. PMNT binds to the Hg2+‐free MSO and the Hg2+–MSO complex in different ways, and exhibits distinguishable and specific optical responses to the target‐induced conformation change.

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A Near‐Infrared‐Fluorescent Chemodosimeter for Mercuric Ion Based on an Expanded Porphyrin

Cited by 247 publications

References 55 publications

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles

An optical sensor for mercury ion based on the fluorescence quenching of tetra(p-dimethylaminophenyl)porphyrin

Optical Detection of Mercury(II) in Aqueous Solutions by Using Conjugated Polymers and Label‐Free Oligonucleotides

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