Synthesis and Negative Photochromic Properties of Photochromic Spiropyrans Compounds Supported by Polyethylene Glycol

Abstract

Abstract: Spirobenzopyrans with carboxylic group were successfully supported by polyethylene glycols in the presence of DCC from the derivatives of indolinospirobenzopyrans and polyethylene glycols. Hydroxyl of polyethylene glycols and carboxylic group in photochromic spirobenzopyrans act as the active groups. Spirobenzopyrans with a good water-solubility were synthesized by introducing hydrophilic groups. Their photochromic properties in solution were investigated by UV-Vis spectroscopy. It is shown that the new compounds had good photochromic properties in ethanol, acetone and ethyl acetate, especially good negative photochromic properties in water under irradiation at 365 nm. The method has advantage of cheap reagents, simple workup procedure. It is of great value for evolution in research studies of new photochromic materials.

Key words: Polyethylene glycol, Spirobenzopyran, Negative photochrmism, Material, UV-Vis spectrum

CLC Number:

O626

TrendMD:

ZOU Wu-Xin, TAN Ting-Feng, LI Xu, Meng Ji-Ben . Synthesis and Negative Photochromic Properties of Photochromic Spiropyrans Compounds Supported by Polyethylene Glycol[J]. Chem. J. Chinese Universities, 2005, 26(8): 1471.

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Synthesis and Negative Photochromic Properties of Photochromic Spiropyrans Compounds Supported by Polyethylene Glycol

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