Abstract
Novel dye aggregates ("comb-type" aggregates) was prepared by hybridizing modified oligodeoxyribo-nucleotides (ODNs), in which dyes were introduced consecutively. From NMR structural analysis, dye molecules were intercalated between base pairs and stacked in anti-parallel manner. When ODNs containing three Methyl Red moieties were hybridized, strong exciton coupling was observed. In addition, thermal stability of duplex was substantially enhanced due to the intermolecular stacking.
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