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Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Fluorescence spectroscopic investigation of the interaction between triphenyltin and humic acids.


PMID 21239217

Abstract

The interaction between triphenyltin (TPT) and humic acid (HA) was investigated using UV-vis and fluorescence spectra techniques. The experimental results showed that the fluorescence quenching of HA by TPT was a result of the interaction of TPT with HA. The binding constant K(b) and corresponding thermodynamic parameters were measured at different temperatures. The binding of TPT molecule to HA is a spontaneous molecular interaction procedure in which entropy increased and Gibbs free energy decreased. Hydrophobic interaction force plays a major role in stabilizing the TPT-HA complex. The three-dimensional fluorescence contour spectra revealed that TPT could enter into the hydrophobic cavities in some domain of HA.

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244775
Triphenyltin hydride
C18H16Sn