Facile Synthesis, Fluorescence, and Photochromism of Novel Helical Pyrones and Chromenes
摘要:
[GRAPHICS]Aryl coumaryl ethylenes undergo oxidative photocyclization readily to yield helical pyrone-annulated condensed aromatics. The pyrones are conveniently converted to the corresponding photochromic diphenylpyrans/chromenes. Both pyrones and chromenes exhibit helicity-dependent fluorescence efficiency and persistence, respectively.
Facile Synthesis, Fluorescence, and Photochromism of Novel Helical Pyrones and Chromenes
摘要:
[GRAPHICS]Aryl coumaryl ethylenes undergo oxidative photocyclization readily to yield helical pyrone-annulated condensed aromatics. The pyrones are conveniently converted to the corresponding photochromic diphenylpyrans/chromenes. Both pyrones and chromenes exhibit helicity-dependent fluorescence efficiency and persistence, respectively.
Die vorliegende Erfindung betrifft spezifische photochrome Phenanthropyrane sowie deren Verwendung in Kunststoffen aller Art, insbesondere für ophthalmische Zwecke. Insbesondere betrifft die vorliegende Erfindung von 2H-Phenanthro[2,1 b]pyranen und 3H-Phenanthro[3,4-b]pyranen abgeleitete photochrome Verbindungen, die in der offenen Form besonders langweilige Absorptionsmaxima aufweisen, jedoch im nicht-angeregten Zustand noch farblos sind.