Excition dynamics in the J-aggregates of a carbocyanine dye.
We report on the exciton dynamics in the J-aggregating dye 5,5', 6,6'-tetrachloro-1,1'-diethyl-3,3'-di(4-sulfobutyl)-benzimidazolocarbocyanine which is known readily to form J-aggregates, even at room temperature and at a low concentration. We performed a series of time-correlated singlephoton-counting experiments at different emission wavelengths and at different temperatures in the range between 1.5 and 125 K. Additionally, the temperature dependence of the relative fluorescence quantum yield was determined.
Laboratory for Time-Resolved Spectroscopy, Federal Institute for Matcrials Research and Testing, Rudower Chausse 5, D-12489, Berlin, Germany.
J
J
Moll
S
S
Daehne
J R
JR
Durrant
D A
DA
Wiersma