A Calixarene-Based Fluorogenic Reagent for Selective Mercury(II) Recognition

Talanova, Galina G.; Elkarim, Nazar S. A.; Talanov, Vladimir S.; Bartsch, Richard A.

doi:10.1021/ac990205u

Cited by 140 publications

(61 citation statements)

References 11 publications

(15 reference statements)

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“…From N-(X)sulfonyl carboxamide derivatized calix [4]-arene, which is selective for Hg 2+ in extraction [177] the fluorophore 37 was derived, the 520 nm emission of which is quenched upon complexation due to electron transfer [178]. Utilizing the cation-π-interaction of the phenyl rings, Tl + could be selectively sensed by the propyl ether of de-t-butylated calix [4]arene in an ISE with log K Tl,M = -1.35 (Ag), -2.7 (Hg), <-4.0 (K, NH 4 , H, Pb), <-5 (Ca, Na, Mg), lin.…”

Section: Other Heavy Metal Ion Recognitionmentioning

confidence: 99%

Calixarene-Based Molecules for Cation Recognition

Ludwig

Dzung

2002

Sensors

168

103

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Section: Other Heavy Metal Ion Recognitionmentioning

confidence: 99%

Calixarene-Based Molecules for Cation Recognition

Ludwig

Dzung

2002

Sensors

168

103

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“…Bartsch and co-workers showed that a calix [4]arene bearing N(X)sulfonylcarboxamide exhibits a good extraction selectivity for Hg 2 + and Pb 2 + over alkali and transition-metal ions. [13] A calix [4]arene (2) with two dansyl groups as part of the N(X)sulfonylcarboxamide (Calix-DANS2) was used for selective Hg 2 + extraction in acidic solutions in the millimolar concentration range, [14] but no attention was paid to the possible detection of Hg 2 + at low concentration. In a preceding paper, we reported preliminary results on the synthesis and the photophysical properties of a new calixarene Calix-DANS4 (3) bearing four dansyl groups which has been designed for the sensitive and selective detection of Pb 2 + .…”

Section: Introductionmentioning

confidence: 99%

Lead and Mercury Sensing by Calixarene‐Based Fluoroionophores Bearing Two or Four Dansyl Fluorophores

Métivier

Leray

Valeur

2004

Chemistry A European J

250

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A detailed study on the photophysical and complexing properties of calixarenes bearing two and four dansyl derivatives (Calix-DANS2 and Calix-DANS4) in a CH3CN/H2O mixture (60:40 v/v) is reported. Calix-DANS2 shows a high selectivity towards Hg2+ over interfering cations (Na+, K+, Ca2+, Cu2+, Zn2+, Cd2+ and Pb2+) and a sensitivity in the 10(-7) mol L(-1) concentration range. The complexation of mercury ion induces a strong fluorescence quenching due to a well-defined electron transfer process from the fluorophore to the metal center. Calix-DANS4 exhibits an extremely high affinity for Pb2+ with a high selectivity over various competing ions. The unprecedented detection limit (4 microg L(-1)) is fully compatible with the level defined by the World Health Organisation. The affinity of Calix-DANS4 for Pb2+ can be rationalized by the activation of the inert pair of electrons on Pb2+. The number of fluorophores involved in the complexation can be determined from a careful time-resolved fluorescence characterization.

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“…For this reason, a wide variety of spectrophotometric methods for the determination of mercury have been reported. [9][10][11][12][13][14][15][16][17][18][19] Each chromogenic system has its advantages and disadvantages with respect to sensitivity, selectivity and analysis speed.…”

Section: Introductionmentioning

confidence: 99%

Solid phase extraction and spectrophotometric determination of mercury in tobacco and tobacco additives with 5-(p-aminobenzylidene)-thiothiorhodanine

Weizhu¹,

Hu²,

Ma³

et al. 2006

J. Braz. Chem. Soc.

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Foi desenvolvido um método altamente sensível, seletivo e rápido para a determinação de mercúrio, a partir da reação rápida de mercúrio(II) com 5-(p-aminobenzilideno)-tiorodanina (ABTR) e posterior extração em fase sólida do quelato colorido, utilizando discos C 18 . Em pH 3,5 e na presença do emulsificante-OP, ABTR reage com mercúrio(II) para formar um quelato vermelho na razão molar 1:2 (mercúrio:ABTR). O quelato foi enriquecido pela extração em fase sólida com discos C 18 e o quelato retido, eluído com dimethyl formamida (DMF). Um fator de enriquecimento na ordem de 50 foi obtido. Em DMF, a absortividade molar do quelato é 1,21×10 5 L mol -1 cm -1 a 545 nm, e a lei de Beer é obedecida no intervalo 0,01~3 μg mL -1 na solução medida. O desvio padrão relativo para onze replicatas a 0,01 μg mL -1 é 1,7%. Este método foi aplicado para a determinação de mercúrio em tabaco e aditivos de tabaco. Bom coeficiente de preconcentração foi encontrado, comparando-se o método proposto com outros similares.A highly sensitive, selective and rapid method for the determination of mercury based on the rapid reaction of mercury(II) with 5-(p-aminobenzylidene)-thiorhodanine (ABTR) and the solid phase extraction of the colored chelate with C 18 disks has been developed. At pH 3.5 and in the presence of emulsifier-OP medium, ABTR reacts with mercury(II) to form a red chelate of a 1:2 (mercury to ABTR) molar ratio. This chelate was enriched by solid phase extraction with C 18 disks and the retained chelate eluted form the disks with dimethyl formamide (DMF). An enrichment factor of 50 was achieved. In the DMF medium, the molar absorptivity of the chelate is 1.21×10 5 L mol -1 cm -1 at 545 nm, and Beer's law is obeyed in the 0.01~3 μg mL -1 range in the measured solution. The relative standard deviation for eleven sample replicate measurements at the 0.01 μg mL -1 level is 1.7%. This method was applied to the determination of mercury in tobacco and tobacco additives and good preconcentration was found between proposed and comparative methods results.

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A Calixarene-Based Fluorogenic Reagent for Selective Mercury(II) Recognition

Cited by 140 publications

References 11 publications

Calixarene-Based Molecules for Cation Recognition

Calixarene-Based Molecules for Cation Recognition

Lead and Mercury Sensing by Calixarene‐Based Fluoroionophores Bearing Two or Four Dansyl Fluorophores

Solid phase extraction and spectrophotometric determination of mercury in tobacco and tobacco additives with 5-(p-aminobenzylidene)-thiothiorhodanine

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