Photochromism of a novel spiropyran derivative based on calix[4]arenes

✍ Scribed by Zhilian Liu; Lin Jiang; Zhi Liang; Yunhua Gao

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 157 KB
• Volume: 737
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2004.11.003

✦ Synopsis

A novel spiropyran derivative carrying a calix [4]arene group has been synthesized through incorporating two spirobenzopyran groups into one 1,3-substituent calix[4]arene derivative. Photochromic properties were studied under alternate irradiation of ultraviolet light and visible light in acetonitrile. Addition of metal ions (such as Mg 2C , Ca 2C , Eu 3C ) decreased the first-order thermal decoloration rate constants to different extent. The colored forms of the compound are more stable than the parent 1 0 ,3 0 ,3-trimethyl-6-nitro-8-methanolspirobenzopyran. It provides a method of increasing stability of the merocyanine forms which are of high importance for applications of photochromic materials, especially in the presence of Eu 3C . The compound may be applied as photochromic materials for its high thermal stability of colored forms.