Abstract
Two novel series of furan-cyanovinyl-phenyl derivatives monohalogenated (series I) and dihalogenated (series II) have been synthesized via Knoevenagel condensation. It is evidenced that the presence of halogen atoms in para position of the phenyl group allows to active the emission properties in the solid state. The analysis of the single crystal structures reveals that the halogen atoms induce specific intermolecular interactions such as C-X --- π interactions for series I, hydrogen bonds and type II halogen – halogen bonds for series II. Moreover, it is showed that the luminogens of the series II present an evolution of the crystalline phase inducing a change of the luminescence colour from the blue to yellow.
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