Two coumarin derivatives containing triazole moieties have been synthesized using "click chemistry" protocol and investigated as chemosensors for the detection of metal ions. These compounds displayed a strong preference for Fe 3+ ions with complexation resulting in fluorescent quenching. The detection limit of the preferred chemosensor was determined to be 1.4 µM. The preferred triazole-coumarin compound showed greater selectivity towards Fe 3+ in the presence of competing metal cations. Binding stoichiometry between this triazole-coumarin and Fe 3+ was shown to occur in a 1:1 ratio between the chemosensor and metal cation. The binding site of Fe 3+ to the triazole-coumarin was determined using 1 H NMR, 13 C NMR and molecular modeling studies.