The physical properties of a material are directly related to the chemical composition, as well as the solid state arrangement of the molecules. Crystal engineering offers a means of “arranging” molecules in the solid state utilizing supramolecular interactions and this consequently impacts the physical properties. This can be accomplished by sensibly selecting complementary molecular components that have affinity to each other, as well as some of the properties desired in the final product. Herein we present a series of cocrystals based on 4,4’-bipyridylethane and 4,4’-bipyridylethene (as the hydrogen bond acceptors) and azobenzene molecules functionalized with appropriate groups, e.g. –OH and –NH<sub>2</sub> (as the hydrogen bond donors). The cocrystals are characterized by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), thermal gravitational analysis (TGA), NMR, IR and, in some cases, single crystal X-ray diffraction. The non-linear optical properties of these materials will also be presented.

Crystal engineering of azobenzene cocrystals with non-linear optical properties

253rd National Meeting (2017)

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