Fluorination-Controlled Aggregation And Intermolecular Interactions In Pt(Ii) Complexes With Tetradentate Luminophores

In this work we describe the synthesis and DFT-supported photophysical characterization of a series of Pt(II) complexes bearing tetradentate luminophores with increasing degree of fluorination. Aggregation into crystalline phases leads to substitution-dependent arrangements that in all cases hinder intermetallic coupling, as intermolecular interactions are dominated by hydrogen bonding and -stacking. In amorphous matrices, on the other hand, we observed that an increasing level of fluorination favors the tendency towards Pt-Pt interaction upon aggregation, leading to a red-shifted phosphorescence, if compared with monomeric species in dilute solutions and crystalline solids.