Synthesis and luminescent properties of some novel naphthalimide dimers

The four kinds of novel naphthalimide dimers were synthesized and their fluorescent lifetimes were investigated. The ground-state/excited state interaction and photo-induced energy/electron transfer in these dimers, which would result in a serial of photochemical properties changes, has been discussed. Using MM2, the energy-minimized molecular modelings of the dimers were studied and confirmed cofacial conformation of chromophores in some dimers, and the pH sensitivity of the dimers has also been detected by fluorescent spectra. [Copyright &y& Elsevier]