Molecular analogues of the green fluorescent protein (GFP) fluorophore have
been designed by these authors (see Figure, X = NC4H9 or O). It is shown t
hat by varying the donor and acceptor groups of the oxazolone (X = O) analo
gue the fluorescence emission can be tuned from blue to green to orange. Th
e utility of these artificial fluorophores is explored by incorporating the
m into organic LEDs.