In this article photophysics of ethyl-3-(benzo[d]thiazol-2-yl)-5-chloro-2-hydroxybenzoate (EBTCH) and ethyl-3-(benzo[d]oxazol-2-yl)-5-chloro-2-hydroxybenzoate (EBOCH) have been explored spectroscopically along with quantum chemical calculations. From structural viewpoint both molecules have two proton acceptor sites (Thiazole/Oxazole...