Rhodamine 610 was irradiated with a laser emitting a 511nm. The photod
egradation of this dye is very slow (quantum yield = 10(-6)). Photoche
mical reactions were made in ethanol with rhodamine 610 alone, and wit
h additives which quench the single state, the triplet state and radic
als. (C) 1997 Elsevier Science Ltd.