FULGIDES AS SWITCHES FOR INTRAMOLECULAR ENERGY-TRANSFER

In a molecular unit which is a donor-fulgimide-acceptor triade, the po ssibility of an intramolecular energy transfer from donor to acceptor depends upon the isomer configuration of the photochromic fulgimide. I t is shown that a switching on and off of this intramolecular energy t ransfer is possible by photoinduced shifting of the fulgimide levels b etween a trap and an antitrap function.