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16 October 1998 Synthesis and characterization of novel polydiacetylenes containing order-enhancing side groups
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Polydiacetylenes are a class of compounds which have been of some interest in both electro-optic and all-optical applications. Although their inherent large third order non- linear optic response is very attractive, it has yet to be optimized in a simple way. Of course the crystalline state will possess the highest values because of the high degree of orientation. Problems, however, exist in the preparation of such crystals with high optical qualities and also processabilities. It is therefore advantageous to study polydiacetylenes in a thin film morphology. Research at NASA has developed a way of preparing high optical quality thin films from monomer solution on to virtually any substrate with great ease. It is the focus of this paper to discuss and present preliminary data on efforts to make highly aligned thin films using this process. We look into the concept of incorporating azo moieties onto the side chains of the polydiacetylene backbone. These groups, when exposed to polarized light at moderate temperatures, go through a cis- trans isomerization which forces it and the other side chains to orient perpendicular to the plane of the polarized light. We discuss the synthesis of such molecules and the preparation of their films to create highly ordered polydiacetylene thin films with a large third order NLO response.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Daniel B. Wolfe, Mark Steven Paley, and Donald O. Frazier "Synthesis and characterization of novel polydiacetylenes containing order-enhancing side groups", Proc. SPIE 3473, Third-Order Nonlinear Optical Materials, (16 October 1998);

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