Bridging the visible: the modulation of the absorption by more than 450 nm.
The coexistence of 18 isomers, identified by NMR spectroscopy and gathered into six states with very different absorption properties, is observed upon irradiation with selective wavelengths of a triphotochromic system joining two naphthopyran entities through a dithienylethene bridge. The sequential electronic coupling of photochromic groups resulted in an absorption behavior reaching far into NIR.
Delbaere
Stéphanie
S
Université Lille Nord de France, CNRS UMR 8516, UDSL, Lille, F-59006 Lille Cedex, France. stephanie.delbaere@univ-lille2.fr
Vermeersch
Gaston
G
Frigoli
Michel
M
Mehl
Georg H
GH