Spectral investigations on N-(2-methylthiophenyl)-2-hydroxy-1-naphthaldimine by silver nanoparticles: quenching.

The photo-physical properties of N-(2-methylthiophenyl)-2-hydroxy-1-naphthaldimine (NMTHN) on silver nano particles have been investigated using optical absorption and fluorescence emission techniques. Silver nanoparticles of different sizes have been prepared by two different methods. The increases in size of the silver nanoparticles cause a decrease in the quenching of fluorescence of NMTHN. Stern-Volmer quenching constants and the association constants have also been calculated.