Fluorescence spectroscopic investigation of the interaction between triphenyltin and humic acids

Zhang, Hongmei; Zhou, Qinqin; Xue, Mei-Gui; Wang, Yanqing

doi:10.1016/j.saa.2010.12.034

Cited by 12 publications

(3 citation statements)

References 31 publications

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“…The HA solution (30 mg/ L) were prepared according to Ref. [12]. The MG solution (2.5 Â 10 À3 mol/L) was prepared by dissolving MG in purified water.…”

Section: Methodsmentioning

confidence: 99%

“…The three-dimensional fluorescence contour spectral method is a rising fluorescence analysis technique, which is a simple, sensitive and rapid method to provide important information on fluorescence functional groups for understanding the chemical nature of humic substances in aqueous media [12,19]. The threedimensional fluorescence contour spectra of HA in absence and presence of MG were shown in Fig.…”

Section: Fluorescence Quenching Of Ha By Mgmentioning

confidence: 99%

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Quest for the binding mode of malachite green with humic acid

Zhang

Yin

Shi

et al. 2015

Journal of Molecular Structure

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“…The HA solution (30 mg/ L) were prepared according to Ref. [12]. The MG solution (2.5 Â 10 À3 mol/L) was prepared by dissolving MG in purified water.…”

Section: Methodsmentioning

confidence: 99%

Section: Fluorescence Quenching Of Ha By Mgmentioning

confidence: 99%

Quest for the binding mode of malachite green with humic acid

Zhang

Yin

Shi

et al. 2015

Journal of Molecular Structure

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“…16 Further, the innate fluorescence of humic acid itself has been quenched with triphenyltin acting as the quencher, showing the versatility of the technique. 17 Finally, the quenching efficiency due to humic acid has been investigated as a function of soil type for a wide variety of natural soils. 18…”

Section: Introductionmentioning

confidence: 99%

Investigating the Binding of Acridine, Acridine Orange, and Acridine Yellow G to Humic Acid through Fluorescence Quenching

Herb

Anderson

2013

Appl Spectrosc

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A fluorescence quenching method was used to determine the equilibrium binding constants for the association of acridine, acridine orange, and acridine yellow G to humic acid. The fluorescence of each polycyclic aromatic nitrogen heterocycle (PANH) was monitored as aliquots of humic acid were added, and a Stern–Volmer plot was produced in which the slope is the equilibrium constant of the binding reaction. The quenching experiments were performed at temperatures of 30, 35, 40, and 45 °C. A van't Hoff plot generated from the equilibrium binding constants as a function of temperature for a given PANH resulted in a linear plot. Calculation of the ΔHbinding, ΔGbinding, and ΔSbinding for each PANH leads to the conclusion that the equilibrium binding constant, and ΔGbinding, may be predictors of bioavailability. The other thermodynamic quantities, ΔHbinding and ΔSbinding, are helpful in understanding the relative binding of the compounds. For example, acridine yellow G appears to be the least bioavailable of the three PANHs studied because of its strong ΔHbinding = −29.8 kJ/mol, which leads to ΔGbinding = −0.71 kJ/mol. While acridine orange and acridine have similar ΔHbinding values, acridine orange is more likely to bind to humic acid because the ΔSbinding for the process is less negative. Thermodynamic values and equilibrium binding constants for all three compounds are reported.

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