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An extremely high rate of holographic surface relief grating inscription has been achieved in materials based on a solid state ring-opening reaction of an oxirane with amino substituted azobenzenes. A number of effective formulations based on various oxirane derivatives and different aminoazobenzene derivatives has been prepared. For one of the best formulations, a low molecular weight three-armed azobenzene derivative has been separated in a pure form. This three-armed azobenzene derivative exhibited the highest inscription rate. [ABSTRACT FROM AUTHOR]

New detachable azobenzene-containing materials produced viasolid state reaction of urea formation were used for the inscription of effective, colourless and stable surface relief gratings. [ABSTRACT FROM AUTHOR]

A series of aromatic polyimides synthesized from various diamidedianhydrides and 2,4-diamino-phenol dihydrochloride were substituted with 4-[N-ethyl-N-(2-hydroxyethyI)Iamino-4'-nitro-azobenzene (Disperse Red 1) via the Mitsunobu reaction. The content of the chromophore in the polyimides has been detenrnined by UV-Vis spectroscopy. The influence of the polyimide structure on the ability for the introduction of the chromophore into the polymers was investigated. Different conditions of the Mitsunobu reaction have enabled the synthesis of polyimides with various contents of DR 1. The induction of optical anisotropy in films of the photochromic polymers was studied by irradiating with the linearly polarized light of an Ar+ laser (488 nm). A dichroism up to 0.2 was induced depending on the content of the push-pull substituted azobenzene side group in these polyimides. [ABSTRACT FROM AUTHOR]

Using solid state ring opening polymerization of oxirane by an amino substituted azobenzene derivative a film material with extremely high rate of holographic surface relief grating formation was obtained. [ABSTRACT FROM AUTHOR]