DESIGN OF A NEW MOLECULAR FLUORESCENT SIGNALING SYSTEM ACTING VIA BOTH ELECTRON AND ENERGY-TRANSFER

A new molecular fluorescent signalling compound has been designed and synthesized in this work. In a molecule, there are two nonconjugated c hromophores included, one of them acts as an electronic acceptor and e nergy transfer donor, while the other is used as an acceptor of energy transfer. The advantages of this design are as follows: first, it can lead to a long-wavelength emission upon excitation at a short wavelen gth after the system was protonized. The second is that this system of fers a large flexibility in choosing dyes with different wavelength of absorption and emission. (C) 1998 Elsevier Science S.A. All rights re served.