Solvent and pH Effects of Coumarin-Terminated Monolayer on Silver Particles.

A coumarin-terminated self-assembled monolayer on silver particles (C-SAM) from the reduction of silver ions in the presence of compound 3 was successfully prepared by utilizing phase transfer method, and analyzed by FTIR, SEM-EDS, UV-Visible and a particle sizer. The fluorescence behavior of coumarin termini was carried out in ethanol and chloroform with emission wavelength determined at 386 nm, suggesting an interaction between the carbonyl group and the solvent media. The dispersion was then investigated in acidic and basic conditions, showing a direct proportional correlation between the emission and the pH of the aqueous.