Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA
Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA
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DOI：
10.1021/ja062095w
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发表时间：
2006-07-19
影响因子：
15
通讯作者：
Brus, Louis E.
中科院分区：
文献类型：
--
作者：
Dukovic, Gordana;Balaz, Milan;Brus, Louis E.
我们已经发现，外消旋混合物的手性单壁纳米管（SWNTs）包裹d（GT）20 DNA寡聚体表现出圆二色性（CD）。我们将CD信号归因于单壁碳纳米管和DNA的跃迁矩耦合产生的诱导CD。虽然纳米管混合物似乎含有等量的两种对映体，但DNA-SWNT跃迁矩相互作用对一种SWNT对映体比另一种更有建设性，导致整体CD信号。
We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)20DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA−SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.