ELECTRONIC AND VIBRATIONAL-SPECTRA OF FILMS AND LANGMUIR-BLODGETT MONOLAYERS OF N-OCTYL-3,4-PERYLENEDICARBOXIMIDE

The spectroscopic characterization of N-octyl-3,4-perylenedicarboximide (PDCI) was carried out using electronic absorption, emission, and vibrational spectroscopy including surface-enhanced Raman scattering (SERS). Stable and transferable Langmuir-Blodgett (LB) monolayers of PDCI have been prepared. Experimental spectroscopic evidence of aggregation in the ground electronic state and in the excited electronic state (excimers) gave yet another example of the role of the aromatic-aromatic intermolecular interactions in the packing of thin solid films. Polarization spectroscopy was used to probe the molecular organization in the LB layers and thin solid films of the asymmetric perylene derivative.