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Perspectives in Photochromism: A Novel System Based on the 1,5‐Electrocyclization of Heteroanalogous Pentadienyl Anions
Author(s) -
Dürr Heinz
Publication year - 1989
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198904131
Subject(s) - photochromism , pericyclic reaction , chemistry , fluorene , photochemistry , holography , computational chemistry , organic chemistry , physics , optics , polymer
The molecular process whereby light induces color changes in certain substances, namely photochromism, is currently a topic of active research. Many reactions—mainly monomolecular—have been reexamined in greater detail from the standpoint of photochromism. Those found to be especially suitable for such studies include cis‐trans isomerizations, pericyclic reactions, tautomerizations and dissociations. The most important in this group are undoubtedly the electrocyclization reactions. In this paper we present spiro[fluorene‐9,1′‐[1,8a]‐dihydroindolizine] and its bis‐ and tris‐aza analogues as examples of a promising new system with a wide range of variability. Not only the classical uses, but also those in new fields such as frequency doubling of laser radiation, holography or molecular microcircuit chips can now be considered.