Three perylene tetracarboxylic bisimide chromophores have been attached to a benzene ring in m-position (3). In this way steric and through-bond interactions of the chromophores are minimized and their through-space-interactions can be studied for which an unusually high bathochromic shift has been found. This indicates a destabilization. No exciton coupling has been observed in the trichromophoric dyes.
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Langhals et al. (1996) studied this question.
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