Unusual stability of thermally induced colored isomers of photochromic 3-aryl-3-(1-naphthyl)-3H-naphtho[2,1-b]pyrans in solid state

Colorless photochromic 3-aryl-3-(1-naphthyl)-3H-naphtho[2,1-b]pyrans are converted to their colored isomers in molten state. It is found that the 1-naphthyl at the 3-position plays the main role for the unusual stability of solid colored isomers at ambient temperature. [Display omitted] Pure solid c...

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Bibliographic Details
Published inTetrahedron letters Vol. 56; no. 25; pp. 3965 - 3968
Main Authors Guo, Kunpeng, Cheng, Jun, Liang, Xiaozhong, Cao, Yaxiong, Chu, Boyang, Liu, Xuguang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 17.06.2015
Subjects
1-Naphthyl
Photochromic naphthopyran
Solid state
Thermal response
Unusual stability
Solid state
Photochromic naphthopyran
Unusual stability
1-Naphthyl
Thermal response
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Summary:Colorless photochromic 3-aryl-3-(1-naphthyl)-3H-naphtho[2,1-b]pyrans are converted to their colored isomers in molten state. It is found that the 1-naphthyl at the 3-position plays the main role for the unusual stability of solid colored isomers at ambient temperature. [Display omitted] Pure solid colorless powder of photochromic 3-aryl-3-(1-naphthyl)-3H-naphtho[2,1-b]pyrans were converted to their colored isomers in molten state. The solid colored isomers exhibit unusual stability at ambient temperature.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2015.05.043