We synthesized a photoreactive hairpin-type oligodeoxynucleotide (P-ODN) possessing an o-nitrobenzyl chromophore and a triplet quencher of 1-aminonaphthalene. Photoirradiation of the hybrid of H-ODN with its complementary DNA led to release of drug in an efficient amount, while the photo-induced drug release was remarkably suppressed in the absence of complementary DNA.
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