A Segregated, Partially Oxidized, and Compact Ag10 Cluster within an Encapsulating DNA Host.

ABSTRACT: Silver clusters develop within DNA strands and become optical chromophores with diverse electronic spectra and wide-ranging emission intensities. These studies consider a specific cluster that absorbs at 400 nm, has low emission, and exclusively develops with single-stranded oligonucleotides. It is also a chameleon-like chromophore that can be transformed into different highly emissive fluorophores. We describe four characteristics of this species and conclude that it is highly oxidized yet also metallic. One, the cluster size was determined via electrospray ionization mass spectrometry. A common silver mass is measured with different oligonucleotides and thereby supports a Ag10 cluster. Two, the cluster charge was determined by mass spectrometry and Ag L3-edge X-ray absorption near-edge s

SUBMITTER: Petty JT 

PROVIDER: S-EPMC6118400 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature