Novel Phthalocyanine Polymers for Applications in Optical Devices

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Abstract
The optical properties of substituted phthalocyaninato-polysiloxanes and their copolymers having the chromophores separated by spacers are discussed in terms of the molecular exciton model. The shift of the Q band maximum of the siloxane polymer compared to the monomeric phthalocyanine as well as the absorption profile is well in accordance with the predictions of the model based on structural data of the materials. The electronics structure assumed by this model is further supported by emission spectroscopy. Separation of the chromophores by introduction of spacers within the main chain leads to materials with the optical properties of the monomeric phthalocyanine, even in the bulk. The band width of the polysiloxane polymer derived from the relative location of oxidation and reduction peaks as measured by cyclovoltammetry agrees well with the optical data.