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PHOTOACTINIC IRRADIATION EFFECT ON REFRACTION INDICE OF ORGANIC CO-CRYSTALS BASED ON AMINOPYRIDINE SERIES

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Subject of Research. The paper presents research of photoactinic radiation effect on refractive indice of organic nonlinear optical co-crystals: 2.6-diaminopyridine-4-nitrophenol and 4-aminopyridine-4-nitrophenol. Method. The research technique included prolonged exposure of the organic nonlinear optical co-crystals of aminopyridine-nitrophenol to a light-emitting diode at a wavelength of 405 nm. In the exposure process of the studied co-crystals a sequential measurement of the refractive indices was carried out by Olympus STM6 instrumental microscope. Main Results. The increase in values of the refractive indices is observed for both co-crystals examined during the long photobleaching. We present circle diagrams for refractive indices of the organic aminopyridine-nitrophenol co-crystals under study. Practical Relevance. The results obtained show the possibility of creating structures based on organic co-crystals of aminopyridine-nitrophenol with a given distribution of refractive indices (periodic lattice and photonic crystal structure).

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