Fluorescence Studies of the Conformational Behavior of Poly(vinyl-pyrrolydone) in Dilute Aqueous Solution

Abstract

Abstract: Fluorescence anisotropy, fluorescence quenching and non-radiative energy transfer studies via the acenaphthylene(ACE) label and 8-anilino-naphthylene sulfornic acid(ANS) probe have demonstrated that poly(vinyl pyrrolydone)(PVP) adopts loose coiled conformation within a wide pH range. Unlike other water-soluble polymers, PVP tends to combine other polymers and/or small molecules with active hydrogen in their structures. This property may be employed to modify the conformational behavior of some water-soluble polymers with hydrophobic microstructures. The nature of the combination may be attributed to hydrogen bond formation, which makes it be easily adsorbed by metal oxide, including SiO₂, Fe₃O₄ etc. Fluorescence studies have also indicated that the aqueous solution of PVP is stable at least within one week if the pH of the solution is greater than 7.

Key words: Poly(vinyl pyrrolydone), Conformation, Fluorescence anisotropy, Fluorescence quenching, Non-radiative energy transfer

CLC Number:

O633

TrendMD:

GAO Gai-Ling, FANG Yu, ZHU Xing-Hua, HU Dao-Dao, LIU Shou-Xin, CUI Ya-Li . Fluorescence Studies of the Conformational Behavior of Poly(vinyl-pyrrolydone) in Dilute Aqueous Solution[J]. Chem. J. Chinese Universities, 2002, 23(11): 2177.

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Fluorescence Studies of the Conformational Behavior of Poly(vinyl-pyrrolydone) in Dilute Aqueous Solution

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