Chemistry Department, UCSB, Santa Barbara, CA 93117, USA.
Chem Commun (Camb). 2012 Jun 11;48(46):5748-50. doi: 10.1039/c2cc17675k. Epub 2012 May 2.
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.
我们使用串联高效液相色谱-质谱联用仪和在线光谱法来鉴定可见-红外发射的 Ag:DNA 复合物中银原子数 N(Ag)在 10 到 21 之间，这些复合物由寡核苷酸单体和二聚体稳定。与具有相同 N(Ag)的裸银簇相比，不同的吸收光谱表明银基相互作用是 Ag:DNA 颜色的起源。
