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The structure, orientation and morphology of self-assembled monolayers of a semifluorinated n-alkanethiol, F(CF2)8(CH2)11SH (F8H11SH), have been investigated by polarized IR, angular dependent XPS, ToF-SIMS, contact angle, and ellipsometric measurements. The orientation of the all trans hydrocarbon segment was found to be tilted much less from the surface normal than the 30° tilt found for octadecanethiol. This has been attributed to the steric constraints imposed by the larger cross section fluorocarbon helices that subsequently are tilted from the surface normal. In addition, studies of dual component mixtures of F8H11SH/F8SH and F8SH/F8H2SH have revealed that competitive adsorption occurs in the former, producing monolayers that are deficient in the shorter F8SH molecules, while in the latter equal representation of both F8SH and F8H2SH molecules are found on the surface due to their similar molecular lengths.

A series of new hexaalkoxytriphenylenes having 1, 2, or even 3 lateral attached acrylate moieties as polymerizable groups were synthesized and characterized. The conditions for the photopolymerization of these monomers in thin film were evaluated and tested. The bisacrylates and trisacrylates were used to build insoluble networks. When a mask is used during the irradiation, patterned films could be prepared. The polymerization reaction was controlled by GPC and FTIR spectroscopy. The networks and patterned structure were confirmed by UV spectroscopy, surface profiles, and SEM photographs. Since hexaalkoxytriphenylenes are known as excellent photoconductors, the photopolymerized films were utilized as hole transport layers in two layered organic light-emitting diodes (LEDs) with Alq3. The LED preparation, characterization, and performance are described.

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