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Three compounds, which comprise of benzo[e]indolinium luminophores with two different fluorescence wavelengths, have been synthesized. Those compounds have been prepared by condensation of benzo[e]indolinium and their counterpart aldehydes, and they were confirmed by H-NMR, MS, IR. The absorption and fluorescence spectra of them were tested. The influences of pH value and various solvents on their absorption and fluorescence spectra were summarized. At the same time, self-condensation of benzo[e]indolinium was found in the synthesis of three compounds above. [Copyright &y& Elsevier]

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]

Two dimers, based on perylene derivatives linked by urea, were synthesized; both dimers are in linear conformations. Fluorescence lifetimes and fluorescent properties of the dimers were investigated. They show fluorescence quenching in the presence of fluoride ion. The binding constants were calculated by the change of fluorescence, and the values were high (of the order of ∼105M-1). [Copyright &y& Elsevier]

Two novel co-facial folded naphthalimide dimers were synthesized. Strong exciton coupling was observed in the folded dimers as an absorption maximum blue-shift. The fluorescent quenching of the dimers compared to that of monomers and the solvent polarity effect on the quenching efficiency are discussed. The fluorescence lifetimes of the dimers have been also investigated and discussed. [Copyright &y& Elsevier]