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. © 2004 Elsevier Ltd. All rights reserved.
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