A study on fluorescence quenching of LD-425 by aromatic amines in 1,4-dioxane-acetonitrile mixtures

► S-V plots of LD-425 show positive deviation in DIO-ACN solvent mixtures with all aromatic amines. ► r>R and kq>4πN′R′D indicate that quenching reactions are due to static quenching with diffusion limited. ► The time resolved measurements indicate the presence of the dynamic quenching process. ► The increase in kq with dielectric constant of solvents indicates the charge transfer character. ► Quenching efficiency increasing with amines ionization energies shows electron transfer nature.