Magic Numbers in DNA-Stabilized Fluorescent Silver Clusters Lead to Magic Colors.

Magic Numbers in DNA-Stabilized Fluorescent Silver Clusters Lead to Magic Colors.
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DNA稳定的荧光银簇中的魔术数字导致魔术色。

DOI:
10.1021/jz500146q
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发表时间:
2014-03-20
期刊:
The journal of physical chemistry letters
影响因子:
--
通讯作者:
Gwinn E
Gwinn E
中科院分区:
其他
文献类型:
--
作者:
Copp SM;Schultz D;Swasey S;Pavlovich J;Debord M;Chiu A;Olsson K;Gwinn E

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DNA稳定的银团簇对于通过稳定的DNA低聚物序列来选择荧光颜色是非常重要的。然而,尽管越来越多的应用程序利用了这一特性,但还没有大规模的研究探索集群颜色的起源,或者某些颜色是否比其他颜色出现得更频繁。在这里,我们使用一组随机选择的684个10碱基齐聚物来解决这些问题。我们发现,特定的颜色带占主导地位,而不是平坦的分布。团簇大小数据表明,这些“魔色”源于DNA稳定的银团簇的幻数的存在,而不同于小分子配体稳定的球形金团簇的魔数。细长的团簇结构,由DNA上的多个碱基配体强制执行,可以解释峰值波长种群周围的魔术数字大小和颜色变化。
DNA-stabilized silver clusters are remarkable for the selection of fluorescence color by the sequence of the stabilizing DNA oligomer. Yet despite a growing number of applications that exploit this property, no large-scale studies have probed origins of cluster color or whether certain colors occur more frequently than others. Here we employ a set of 684 randomly chosen 10-base oligomers to address these questions. Rather than a flat distribution, we find that specific color bands dominate. Cluster size data indicate that these “magic colors” originate from the existence of magic numbers for DNA-stabilized silver clusters, which differ from those of spheroidal gold clusters stabilized by small-molecule ligands. Elongated cluster structures, enforced by multiple base ligands along the DNA, can account for both magic number sizes and color variation around peak wavelength populations.
DOI: 10.1021/ac201321m
发表时间: 2011-08-01
影响因子: 7.4
作者:
Petty, Jeffrey T.;Sengupta, Bidisha;Story, Sandra P.;Degtyareva, Natalya N.
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期刊: ADVANCED MATERIALS
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发表时间: 2013-05-28
期刊: ADVANCED MATERIALS
影响因子: 29.4
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DOI: 10.1039/c2cc17675k
发表时间: 2012-01-01
影响因子: 4.9
作者:
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通讯作者: Gwinn, Elisabeth G.