Premium
Spectroscopic characterization and Langmuir–Blodgett films of N , N ‐symmetrical dialkyl‐3,4:9,10‐perylenebis(dicarboximide)s
Author(s) -
Maiti A. K.,
Aroca R.,
Nagao Y.
Publication year - 1993
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250240603
Subject(s) - langmuir–blodgett film , raman spectroscopy , monolayer , chemistry , alkyl , infrared spectroscopy , raman scattering , molecule , analytical chemistry (journal) , absorption (acoustics) , langmuir , infrared , absorption spectroscopy , resonance (particle physics) , crystallography , adsorption , materials science , organic chemistry , optics , particle physics , composite material , biochemistry , physics
The electronic and vibrational spectra of N ‐R‐ N ′‐R‐symmetrical dialkyl‐3,4:9,10‐perylenebis(dicarboximide)s (R = C 5 H 11 , C 6 H 13 and C 8 H 17 ) are reported. Langmuir monolayers were prepared and surface pressure–area isotherms were measured for three non‐amphiphilic molecules. Langmuir–Blodgett (LB) films of mixed layers only were fabricated on solid substrates. Fundamental vibrational frequencies were observed using surface‐enhanced resonance Raman scattering, transmission and reflection–absorption (RAIRS) Fourier transform infrared spectroscopy. The molecular orientation in the LB films was established from the transmission and RAIRs spectra. Molecular aggregation is reduced by the presence of bulky alkyl substituents. The adsorption of electron acceptor molecules and its effect on the fluorescence yield are also reported.