248. Axially-Chiral Boramidine for Detailed (Chir)Optical Studies
     Nidal Saleh, Estefanía Sucre-Rosales, Francesco Zinna, Céline Besnard, Eric Vauthey, Jérôme Lacour
     Chem. Sci. 2024, 15, 6530-6535

The inclusion of boron atoms into chiral π-conjugated systems is an effective strategy to unlock unique chiroptical properties. Herein, the preparation and characterization of a configurationally stable axially-chiral boramidine are reported showcasing absorption in the UV domain, deep-blue fluorescence (Φ up to 94%), and ca. |10^-3| g_abs and g_lum values. Detailed photophysical studies and quantum-chemical calculations clearly elucidate the deactivation pathways of the emissive state to triplet excited states, involving increased spin-orbit coupling between the lowest singlet excited state and an upper triplet state.

DOI : 10.1039/D4SC00870G