On the fluorescence of anthracene chromophores in langmuir-blodgett films

• Published in: Thin solid films Vol. 169; no. 1; pp. 127 - 142
• Main Authors: Biesmans, G., Verbeek, G., Verschuere, B., van der Auweraer, M., De Schryver, F.C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.1989
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/S0040-6090(89)80011-2

The fluorescence spectrum of monolayers of 7-(2-anthryl)-heptanoic acid (2A7), 12-(2-anthryl)-dodecanoic acid (2A12) and 3-[9-(10-butyl)-anthryl]-propanoic acid consists of a weakly structured band with a maximum intermediate between the 0–0 transition of the absorption spectrum and the emission maximum of the intramolecular and intermolecular excimer. The fluorescence spectrum of 2A7 monolayers, determined with time-resolved emission spectroscopy, is time independent between 0 and 11.5 ns after excitation. When 2A7 is diluted with myristic acid changes in the fluorescence and the fluorescence excitation spectrum indicate the occurrence of deeper traps and at high dilution (1:100) the decrease of the aggregate size is observed. The fluorescence of mixed monolayers of 2A12 and arachidic acid indicates that even at high dilution no mixing on the molecular level occurs in the monolayer.