Characterisation of LB multilayers of soluble phthalocyaninatopolysiloxane

Tetra(methoxy)tetra(octyloxy)phthalocyaninatopolysiloxane (PcPS), a soluble rigid-rod polymer, forms stable monolayers on water, which can be transferred onto solid substrates. The orientation of the polymer in the transferred layers is induced by the flow on the water subphase. If a convergent flow is induced, the molecules will be aligned parallel to the dipping direction. A DC-conductivity of 10⁻⁷ S · cm⁻¹ was measured for the undoped films. Measurements with an <HG/PcPS/ITO> sandwich structure show rectification and hysteresis characteristics. PcPS modified by terminal double bonds in the side chains can be crosslinked by UV irradiation. Patterns can be developed in these films using a negative photoresist technique.