Perovskite-Like Liquid-Crystalline Materials Based on Polyfluorinated Imidazolium Cations

Hybrid Organic-Inorganic Halide Perovskites (HOIHPs) represent an emerging class of semiconducting materials, widely employed in a variety of optoelectronic applications. Despite their skyrocket growth in the last decade, a detailed understanding on their structure-property relationships is still missing. In this communication, we report two unprecedented perovskite-like materials based on polyfluorinated imidazolium cations. The two materials show thermotropic liquid crystalline behavior resulting in the emergence of stable mesophases. The manifold intermolecular F & sdot; & sdot; & sdot; F interactions are shown to be meaningful for the stabilization of both the solid- and liquid-crystalline orders of these perovskite-like materials. Moreover, the structure of the incorporated imidazolium cation was found to tune the properties of the liquid crystalline phase. Collectively, these results may pave the way for the design of a new class of halide perovskite-based soft materials. In this communication, we report two novel intrinsically liquid crystalline metal halide perovskite-like materials by utilizing fluorinated ionic liquid crystalline (FILC) mesogens based on polyfluorinated alkylimidazolium cations. Manifold intermolecular F & sdot; & sdot; & sdot; F interactions were found to be essential for the solid- and liquid-crystalline orders of the perovskite-like structures. This study may pave the way towards a new class of perovskite-based soft materials. image