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DNA Length Dependent Photocurrent of Diketopyrrolopyrrole Aggregates Constructed with DNA
Nakamura, Mitsunobu,Tsuto, Koji,Takada, Tadao,Yamana, Kazushige Korean Society of Photoscience 2014 Rapid communication in photoscience Vol.3 No.4
Bis(2-thienyl)-diketopyrrolopyrrole having two $Zn^{II}$-cylcens (DPPCy) was synthesized. DPP-aggregates were constructed by self-organization of DPPCy and $dT_n$-DNAs. In the presence of L-ascorbic acid as an electron sacrifice reagent, the DPP aggregates immobilized on a gold electrode exhibit good anodic photocurrent responses as well as cathodic photocurrent responses in the presence of methyl viologen. The anodic photocurrent responses depend on the DNA lengths because of the formation of uniform DPP-aggregates corresponding to the DNA lengths. The present results show that photocurrent responses of the DPP-aggregates can be controlled by DNA lengths and electron sacrifice reagents.