Silver atom and strand numbers in fluorescent and dark Ag:DNAs

Chem Commun (Camb). 2012 Jun 11;48(46):5748-50. doi: 10.1039/c2cc17675k. Epub 2012 May 2.

Abstract

We use tandem HPLC-mass spectrometry with in-line spectroscopy to identify silver atom numbers, N(Ag), of 10 to 21 in visible- to infrared-emitting Ag:DNA complexes stabilized by oligonucleotide monomers and dimers. Qualitatively different absorbance spectra from bare, same-N(Ag) silver clusters point to silver-base interactions as the origin for the color of Ag:DNAs.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Chromatography, High Pressure Liquid
  • Coordination Complexes / chemistry*
  • DNA / chemistry*
  • Oligonucleotides / chemistry
  • Silver / chemistry*
  • Spectrometry, Fluorescence
  • Tandem Mass Spectrometry

Substances

  • Coordination Complexes
  • Oligonucleotides
  • Silver
  • DNA