Abstract
Bis(2-thienyl)diketopyrrolopyrrole with two Zn(II)-cyclens (ZnCyc-DPP) was designed and synthesized to evaluate the selective binding of Zn(II)-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 Zn(II)-cyclen-chromophore conjugates and thymine bases together is a powerful tool for preparing DNA-templated multichromophoric systems with specific functions.
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