| Abstract
| - The reduction of silver cations bound to the oligonucleotide dC12 was used to form silver nanoclusters. Massspectra show that the oligonucleotides have 2−7 silver atoms that form multiple species, as evident from thenumber of transitions in the fluorescence and absorption spectra. The variations in the concentrations of thenanoclusters with time are attributed to the changing reducing capacity of the solution, and the formation ofoxidized nanoclusters is proposed. Via mass spectrometry and circular dichroism spectroscopy, double-strandedstructures with Ag+-mediated interactions between the bases are observed, but these structures are notmaintained with the reduced nanoclusters. Through variations in the pH, the nanoclusters are shown to bindwith the N3 of cytosine.
|
