Herein, we present a template approach that allows for the incorporation of normally labile metal centers, such as copper(I), copper(II), and silver(I), into DNA branch points(Scheme 1 a). Remarkably high structural stability and chir-al... Herein, we present a template approach that allows for the incorporation of normally labile metal centers, such as copper(I), copper(II), and silver(I), into DNA branch points(Scheme 1 a). Remarkably high structural stability and chir-ality transfer to the metal complex are demonstrated. More-over, we have used this approach to generate the first example of a dynamic multimetallic metal–DNA assembly, with three metal complexes as the corners, single-stranded DNA as the sides, and multiple DNA double strands at the periphery (Scheme 1 d). We demonstrate quantitative and reversible structural switching of these metal–DNA nanostructures by adding specific DNA strands, resulting in controlled modu-lation of the metal–metal distances.This contribution thus allows the programmable generation of structurally dynamic multimetallic metal–DNA assemblies, with anticipated appli-cations in nanoelectronics, nanooptics, artificial photosyn-thesis, high-density data storage, and catalysis.
To create stable and electroactive metal–DNA junctions,we examined the attachment of the ligand bis(2,9-diphenyl)-1,10-phenanthroline (dpp) to DNA (Scheme 1 a). This ligand has been used by the groups of Sauvage and others to
generate interwoven structures.[10]It forms complexes such as [Cu(dpp)2]+, whose redox potential falls within the compat-ible window for DNA bases (+ 0.8 to-0.7V vs. saturated calomel electrode, SCE)
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