Carborane Photochemistry Triggered by Aryl Substitution: Carborane-Based Dyads with Phenyl Carbazoles

probably because the parent carboranes and their derivativeswithout p substituent show little or no absorption at>250 nm, nor any emission. Even for their p-substitutedderivatives,furthermore,nodetailedinvestigationshavebeenperformed, particularly into how the carborane cages affecttheir excited-state behavior.