Molecular Orientation and Aggregation in Mixed Langmuir−Blodgett Films of 5-(4-N-Octadecylpyridyl)-10,15,20-tri-p-tolylporphyrin and Stearic Acid Studied by Ultraviolet−Visible, Fluorescence, and Infrared Spectroscopies
作者： Zhijun Zhang , Kenichi Nakashima , Anandi Lal Verma , Mitsuru Yoneyama , Keiji Iriyama
DOI: 10.1021/LA970983M
关键词: Alkyl 、 Langmuir–Blodgett film 、 Infrared spectroscopy 、 Infrared 、 Molecule 、 Photochemistry 、 Fluorescence 、 Chemistry 、 Porphyrin 、 Stearic acid
摘要: Molecular aggregation and orientation in mixed Langmuir−Blodgett (LB) films of 5-(4-N-octadecylpyridyl)-10,15,20-tri-p-tolylporphyrin (porphyrin 338a) stearic acid have been investigated by means ultraviolet−visible (UV−vis), fluorescence, infrared (IR) spectroscopies. It has found that for the multilayer LB deposited onto glass gold-evaporated substrates, formation porphyrin aggregates is facilitated adding acid, evidenced a 3−6 nm red shift Soret band UV−vis spectra 5 Q(x)(0,0) fluorescence emission spectra, compared to corresponding 338a. This result one-layer suggest fatty molecules impose their effect on promoting via interlayer interactions. Comparison IR between those 338a leads conclusion alkyl chains mo...
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