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• W2914781509 abstract "The silver-nucleoside complex [Ag(i)-(N3-cytidine)2], 1, self-assembles to form a supramolecular metal-mediated base-pair array highly analogous to those seen in metallo-DNA. A combination of complementary hydrogen-bonding, hydrophobic and argentophilic interactions drive the formation of a double-helix with a continuous silver core. Electrical measurements on 1 show that despite having Ag···Ag distances within <5% of the metallic radii, the material is electrically insulating. This is due to the electronic structure which features a filled valence band, an empty conduction band dominated by the ligand, and a band gap of 2.5 eV. Hence, as-prepared, such Ag(i)-DNA systems should not be considered molecular nanowires but, at best, proto-wires. The structural features seen in 1 are essentially retained in the corresponding organogel which exhibits thixotropic self-healing that can be attributed to the reversible nature of the intermolecular interactions. Photo-reduced samples of the gel exhibit luminescence confirming that these poly-cytidine sequences appropriately pre-configure silver ions for the formation of quantum-confined metal clusters in line with contemporary views on DNA-templated clusters. Microscopy data reveals the resulting metal cluster/particles are approximately spherical and crystalline with lattice spacing (111) similar to bulk Ag." @default.
• W2914781509 created "2019-02-21" @default.
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• W2914781509 date "2019-01-01" @default.
• W2914781509 modified "2023-10-18" @default.
• W2914781509 title "Addressing the properties of “Metallo-DNA” with a Ag(<scp>i</scp>)-mediated supramolecular duplex" @default.
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• W2914781509 doi "https://doi.org/10.1039/c8sc05103h" @default.
• W2914781509 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6429620" @default.
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• W2914781509 hasPublicationYear "2019" @default.
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