Ag nanocluster formation using a cytosine oligonucleotide template
Ag nanocluster formation using a cytosine oligonucleotide template
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DOI：
10.1021/jp0648487
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发表时间：
2007-01-11
影响因子：
3.7
通讯作者：
Petty, Jeffrey T.
中科院分区：
文献类型：
--
作者：
Ritchie, Caroline M.;Johnsen, Kenneth R.;Petty, Jeffrey T.
结合在寡核苷酸DC(12)上的银阳离子被还原以形成银纳米簇。从荧光光谱和吸收光谱的跃迁次数可以看出，这些寡核苷酸有2-7个银原子，形成多个物种。纳米团簇的浓度随时间的变化归因于溶液还原能力的变化，并提出了氧化态纳米团簇的形成。通过质谱仪和圆二色谱，观察到碱基之间存在Ag+介导的相互作用的双链结构，但这些结构不随还原的纳米团簇而保持。通过改变pH值，纳米团簇被证明与胞嘧啶的N3结合。
The reduction of silver cations bound to the oligonucleotide dC(12) was used to form silver nanoclusters. Mass spectra show that the oligonucleotides have 2-7 silver atoms that form multiple species, as evident from the number of transitions in the fluorescence and absorption spectra. The variations in the concentrations of the nanoclusters with time are attributed to the changing reducing capacity of the solution, and the formation of oxidized nanoclusters is proposed. Via mass spectrometry and circular dichroism spectroscopy, double-stranded structures with Ag+-mediated interactions between the bases are observed, but these structures are not maintained with the reduced nanoclusters. Through variations in the pH, the nanoclusters are shown to bind with the N3 of cytosine.