Yellow-Green and Blue Fluorescent 1,8-Naphthalimide-Based Chemosensors for Metal Cations

Two new 1,8-naphthalimides (NI), emitting yellow-green or blue fluorescence depending on the type of substituents at C-4 position, have been synthesized and characterized. Their basic photophysical characteristics investigated in organic solvents different polarities. ability to detect metal ions (Ag+, Cu2+, Zn2+ Ca2+, Mg2+, Ni2+, Fe3+) has studied DMF solution. The amino (NI1) alkoxy (NI2) functionalized exhibit optical ion sensing properties attributable nature substituents. In addition, theoretical calculations based affordable but effective density functional theory (DFT) time-dependent DFT (TDDFT) methods were performed order investigate geometric electronic structure title NI compounds.