The fluorescence of -methoxy,5-(2'-ethylhexloxy)-p-phenylene-vinylene)
(MEH-PPV) quenched by fullerenes was examined, and the results indica
te that this quenching is not dynamic. Strong interaction in the excit
ed state between them may be caused by the photoinduced charge transfe
r and pi-pi conjugated system interaction. More direct and convincing
evidence of the charge transfer complex are presented. (C) 1998 John W
iley & Sons, Inc.