853305-73-4Relevant academic research and scientific papers
Photoswitch based on remarkably simple naphthopyrans
Sallenave, Xavier,Delbaere, Stéphanie,Vermeersch, Gaston,Saleh, Ahmed,Pozzo, Jean-Luc
, p. 3257 - 3259 (2005)
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.
