Abstract
Two molecules, 3-thienylpentadecanoic acid (3TC15) and distearylviologene (DSV), were investigated as potential candidates for building up mixed films prepared by the Langmuir-Blodgett technique. The mixture of 3TC15 and DSV builds up stable monolayers at the liquid-gas interface and can be transferred an monolayer and multilayer onto a variety of solid supports. In the films the electron-donating thiophene moiety is separated from the electron-accepting viologene. To reveal the molecular alignment within the films, polarization-dependent Fourier transform IR (FTIR) spectroscopy and surface plasmon resonance (SPR) experiments were applied. The FTIR results demonstrate upright alignment of both molecules in the mixed films. The calculated monolayer thickness is confirmed by the SPR results and a model for the film structure is established.
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