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In this paper, we used organic nonlinear optical materials based on 4-nitrophenol and 2,6-diaminopyridine co-crystals. The goal was to study the influence of photobleaching processes on spectral characteristics of mentioned co-crystals. We presented spectral characteristics of transmittance coefficients of material before photobleaching and after its exposure to light for 4 weeks. We also noted the breakdown of hydrogen bonds in a molecular complex of co-crystal under the influence of photobleaching. However, this breakdown does not lead to disruption of the integrity of the molecules that are a part of an aminopyridine-nitrophenol.

Influence of Processes of Photobleaching on Spectral Characteristics of Organic Nonlinear Optical Co-crystal 26DAP4N