Solid-Emissive BODIPY Derivatives: Design, Synthesis and Applications

Solid-emissive materials have found many applications in various fields, especially in the development of organic lightemitting diodes (OLED) and solid-state sensory devices. Currently, the biggest limitation is the availability of highly solid-emissive materials, which meet the requisites of good chemical- and photo-stability. Among all the chromophores developed until now, BODIPY derivatives (4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene) have been recognized as the best candidates for practical applications, due to their excellent photophysical properties and high stability. To maintain the fluorescence of Boron difluorides in solid state, numerous strategies are adopted, focusing on inhibition of intermolecular planar π-π interactions. This review mainly deals with solid-emissive BF2 complexes, concerning molecular design, synthesis, photophysical properties, and their applications.