| Abstract
| - In this paper we report the self-assembling nature of fluorescent hexaazatriphenylenes (HATs) 6a−dwith six alkyl/alkoxy-chain-containing biphenyl groups and their application to light-harvesting antennae.In a nonpolar solvent and the film state, the HAT derivatives form one-dimensional aggregates with anH-type parallel stacking mode, which were analyzed by 1H NMR, UV−vis, and steady-state and time-resolved fluorescence spectroscopy. When HAT derivative 7 with six perylenediimide moieties isincorporated into the one-dimensional aggregates, an efficient energy transfer takes place from the self-assembled HAT moiety as a light-harvesting antenna to the perylenediimide moiety as an energy acceptor.Further, when HAT derivative 8 with six triphenylamino moieties is newly added to the light-harvestingsystem, an intermolecular electron transfer occurs subsequently between the electron-accepting perylenediimide molecule and the electron-donating triphenylamino molecule.
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