Binding of Ionic Derivative of Pyrene to Strong Polyelectrolyte

Abstract

Abstract: Binding of pyrene probe cation of 1-pyrenemethylamine hydrochloride(PyMeAH⁺) to sulfonate polyelectrolyte PAMPSin aqueous solution was investigated by the relative fluorescent intensity I^E/ I^M of the excimer to monomer. The saturation amount of repeat unit AMPSfor the polyelectrolyte bound to one PyMeAH⁺ ion was about 2.5 estimated from the maximum on the curve of I^E/ I^Mvs. the probe concentrations. The increase of the ionic strength of the solution by adding salt or excess alkali ions of 10^-4 mol/Lgreatly reduced the I^E/ I^Mvalue. This factsuggested that the probe cation PyMeAH⁺ form a loose ion pair with the sulfonate anion on the polyelectrolyte.

Key words: Polyelectrolyte, Ionic derivative of pyrene, Binding, Excimer, Fluorescence spectra

CLC Number:

O631

TrendMD:

WANG Chao-Yang, SUN Qi-Long, TONG Zhen, LIU Xin-Xing, ZENG Fang, GAO Feng . Binding of Ionic Derivative of Pyrene to Strong Polyelectrolyte[J]. Chem. J. Chinese Universities, 2001, 22(7): 1265.

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Binding of Ionic Derivative of Pyrene to Strong Polyelectrolyte

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