Title of article
Photoswitch based on remarkably simple naphthopyrans
Author/Authors
Jean-Michel Sallenave، نويسنده , , Xavier and Delbaere، نويسنده , , Stephanie and Vermeersch، نويسنده , , Gaston and Saleh، نويسنده , , Ahmed and Pozzo، نويسنده , , Jean-Luc، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2005
Pages
3
From page
3257
To page
3259
Abstract
Photochromic switches built around 5-carbonyl-3,3-diphenyl-3H-naphtho[2,1-b]pyran unit have been synthesized. Their open forms are constituted of a 1:1 ratio of TC and TT-isomers according to 19F and 1H NMR investigations. Electrocyclization of TT isomers back to the closed form is efficiently achieved upon visible irradiation whereas it has been found to be a particularly unfavoured thermal process. These simple 2H-chromenes could act as molecular photoswitch at ambient temperature.
Keywords
photoswitch , Naphthopyrans , Photochromism , 19F NMR
Journal title
Tetrahedron Letters
Serial Year
2005
Journal title
Tetrahedron Letters
Record number
1845571
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