“…The properties of triplet excited states result to be markedly medium-dependent; in this context, they can be excellent reporters to investigate compartmentalized microenvironments, including the protein binding pockets. [14]. We have previously shown that the behavior of triplet excited states of ligands within transport proteins (such as1-acid glycoproteins or serum albumins), monitored by transient absorption spectroscopy, constitutes a powerful tool to examine drug binding.…”