Highly selective probes of copper(II) complexes for sulfide detection and cytotoxicity assay

The synthesis, crystal, hydrogen sulfide detection and cell assement of novel chemsensors based on coumarin derivatives

A series of chemsensors (1–4) containing fluorobenzene group based on coumarin derivatives have been developed for the selective and sensitive detection of H₂S. The advantages of the synthesized fluorescent probe (compound 1) were the low detection limit (4 × 10⁻⁶ mol·L⁻¹), good selectivity and high sensitivity which had been demonstrated through UV-vis, fluorescent titration experiments. Besides cytotoxicity test of compounds (1 and 2) was studied and the results indicated that compounds (1 and 2) showed almost no cytotoxicityat at a concentration of 150 μg·mL⁻¹. The interacted mechanism was the thiolysis reaction of dinitrophenyl ether which had been confirmed by fluorescence and HRMS titration experiment. In addition, probe 1 can also detect HS⁻ selectively by naked eye in pure DMSO solvent.