Abstract
The characteristics of the excited states ofN-phenyl-1,8-naphthalimide and some of its derivatives have been estimated by the PPP-CI technique. Charge transfer transitions are present together with localized transitions on the benzene and naphthalene fragments, in the electronic absorption spectra of these systems. A considerable shift of the naphthalenep-transition under the effect of electron-donating substituents in the naphthalene ring has been noticed. Electron-donating substituents in the benzene ring do not change the energy of the naphthalene transitions but shift the charge transfer transitions to a longer wavelength region.
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