Water soluble organic photochromes: Sulphonated spiro (indolinonaphthoxazines)

被引：0
|
作者：
Allegrini, Pietro [1 ]
Malatesta, Vincenzo [1 ]
机构：
[1] Enichem Synthesis, Milano, Italy
来源：
Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals | 1994年 / 246卷
关键词：
Computational methods - Crystallization - Heat treatment - Photochromism - Reaction kinetics - Solutions - Synthesis (chemical);
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学科分类号：
摘要：
Two photochromic disulphonated spiro (indolino-naphthoxazines) have been synthesized. Both compounds crystallize in the open merocyanine form. The molar extinction coefficients of the coloured forms have been calculated and the rate constant kb for the thermal bleaching measured. The presence of sulphonic groups lowers the kb, value by two orders of magnitude with respect to that of the unsubstituted compound.
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页码：25 / 28
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