Diketopyrrolopyrrole J‐Aggregates Formed by Self‐Organization with DNA |
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| Authors: | Koji Tsuto Prof. Mitsunobu Nakamura Dr. Tadao Takada Prof. Kazushige Yamana |
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| Affiliation: | Department of Materials Science and Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671‐2280 (Japan), Fax: (+81)?79‐267‐4928 |
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| Abstract: | Bis(2‐thienyl)diketopyrrolopyrrole with two ZnII‐cyclens (ZnCyc‐DPP) was designed and synthesized to evaluate the selective binding of ZnII‐cyclen with thymine base in single‐strand DNA as a tool for the construction of a highly ordered multichromophore system on DNAs. Through UV/Vis titrations, gel filtration chromatography, and circular dichroism spectroscopy, ZnCyc‐DPP formed J‐type DPP aggregates with oligo‐dTn DNAs. The DPP aggregates absorbed on a gold electrode exhibited good photocurrent responses. The present results show that binding ZnII‐cyclen–chromophore conjugates and thymine bases together is a powerful tool for preparing DNA‐templated multichromophoric systems with specific functions. |
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| Keywords: | aggregation chromophores DNA dyes/pigments self‐assembly |
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