Self-assembly of small gold nanoparticles through interligand interaction.
Self-assembly of small gold nanoparticles through interligand interaction.
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DOI：
10.1021/ja064510q
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发表时间：
2006-09
影响因子：
15
通讯作者：
M. Kanehara;Etsushi Kodzuka;T. Teranishi
中科院分区：
文献类型：
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作者：
M. Kanehara;Etsushi Kodzuka;T. Teranishi
在一系列双齿配体2，6-双（1 '-（n-硫代烷基）苯并咪唑-2-基）吡啶（TC（n）BIP，n = 3，6，8，10，12）存在下，在DMF/H2O中还原HAuCl（4）x4 H（2）O，容易地制备出稳定、单分散的小于2nm的Au纳米粒子。TC（n）BIP配体由于其双齿的性质而提供比烷硫醇更强的配位能力。这些小的纳米粒子形成六方密堆积（hcp）的二维（2D）超晶格，具有可调的粒子间间距（从1.2到2.5 nm），通过改变疏水无定形碳和空气-水界面处的配体的长度来产生。长程有序hcp二维超晶格是通过在空气-水界面退火过程中形成的配体间π-π相互作用的裂解和构建而制备的。
Stable and monodisperse Au nanoparticles smaller than 2 nm are easily prepared by the reduction of HAuCl(4) x 4H(2)O in DMF/H(2)O in the presence of a series of bidentate ligands, 2,6-bis(1'-(n-thioalkyl)benzimidazol-2-yl)pyridine (TC(n)BIP, n = 3, 6, 8, 10, 12). The TC(n)BIP ligands afford stronger coordination ability than alkanethiols due to their bidentate nature. These small nanoparticles form hexagonal close-packed (hcp) two-dimensional (2D) superlattices with tunable interparticle spacings (from 1.2 to 2.5 nm), produced by changing the length of the ligand at both the hydrophobic amorphous carbon and the air-water interface. Long-range-ordered hcp 2D superlattices were fabricated through the cleavage and construction of interligand pi-pi interactions formed via an annealing process at the air-water interface.