An unusual emissive and colorimetric copper (II) detection by a selective probe based on a pseudo-crown cysteine dye: Solution and gas phase studies

An off-on-off emissive and colorimetric probe L, based on a Pseudo-Crown cysteine dye was designed to detect Copper (II) in solution and in gas-phase (MALDI-MS). The recognition of Cu2 + by L lead to fluorescent red/dark red colored complexes.280