Studies on Preparation and Property of Azobenzene-contained Pullulan Derivatives

Abstract

Abstract: Azobenzene-modified pullulan with different substitution degrees were prepared by changing feed molar ratio of 4-phenylazophenyloxybutyrate acid to pullulan. The structure of the modified pullulan were characterized by ¹H NMR and FTIR spectroscopies. The substitution degrees were determined by elemental analysis and UV-Vis spectra. Photochromism property in solution was investigated by UV-Vis spectroscopy, isomerization behavior of azobenzene moeties of polymer under irradiation at 350 nm is obvious. After 4 min irradiation, trans isomer of sample 3 change into cis isomer completely. Furthermore, unlike pullulan, which is soluble only in H₂O or DMSO, the solubility of these products in common organic solvent increased greatly.

Key words: Pullulan, Azobenzene, Photochromism

CLC Number:

O631

TrendMD:

JIAO Yong-Hua, ZHANG Li-Mei, JIANG Zhen-Hua . Studies on Preparation and Property of Azobenzene-contained Pullulan Derivatives[J]. Chem. J. Chinese Universities, 2004, 25(2): 289.

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Studies on Preparation and Property of Azobenzene-contained Pullulan Derivatives

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