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We investigate the influence of intermolecular interactions on the optical and structural properties of oligophenyls in solid films of polycrystalline nature. To this end, we have performed X-ray powder diffraction (XRD) experiments in a pressure range up to 2kbar yielding the lattice constants of biphenyl (2P) as a function of pressure. The optimized geometry of the 2P molecule - including the inter-ring...
The poly(p-phenylene) oligomer p-hexaphenyl is used in electroluminescent devices emitting intense blue light. The defined thin film crystal growth of hexaphenyl is studied under certain conditions. Thin films are grown by physical vapor deposition on various substrates (GaAs, ITO). The influence of the substrate temperature (room temperature to 170°C) and film thickness (up to 6000Å) on the nature...
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