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Understanding and designing one-dimensional assemblies of ligand-protected metal nanoclusters
Materials Horizons ( IF 13.3 ) Pub Date : 2019/12/23 , DOI: 10.1039/c9mh01691k
Sakiat Hossain 1, 2, 3, 4, 5 , Yukari Imai 1, 2, 3, 4, 5 , Yuichi Motohashi 3, 5, 6, 7, 8 , Zhaoheng Chen 1, 2, 3, 4, 5 , Daiki Suzuki 1, 2, 3, 4, 5 , Taiyo Suzuki 1, 2, 3, 4, 5 , Yuki Kataoka 1, 2, 3, 4, 5 , Momoko Hirata 1, 2, 3, 4, 5 , Tasuku Ono 1, 2, 3, 4, 5 , Wataru Kurashige 1, 2, 3, 4, 5 , Tokuhisa Kawawaki 1, 2, 3, 4, 5 , Takahiro Yamamoto 3, 5, 8, 9, 10 , Yuichi Negishi 1, 2, 3, 4, 5
Affiliation  

If we wish to use metal clusters as magnetic materials and dipole materials, it is necessary to assemble the clusters to attain a certain material size. However, the types of building-block clusters suitable for assembly are currently very limited, and thereby we have little information on the factors required to assemble metal clusters and the physical properties and functions of such assembled structures. In this research, we found the following four points about thiolate (SR)-protected gold–platinum alloy (Au4Pt2) clusters ([Au4Pt2(SR)8]0); (1) [Au4Pt2(SR)8]0 is a metal cluster that can be used as a building block to form one-dimensional (1D) connected structures (1D-CS) via inter-cluster Au–Au bonds (aurophilic bond); (2) although all [Au4Pt2(SR)8]0 clusters have similar structures, the intra-cluster ligand interactions vary depending on the ligand structure. As a result, the distribution of the ligands in [Au4Pt2(SR)8]0 changes depending on the ligand structure; (3) the differences in the distributions of the ligands influence the inter-cluster ligand interactions, which in turn affects the formation of 1D-CS and changes the connected structure; and (4) the formation of 1D-CS decreases the band gap of the clusters. These results demonstrate that we need to design intra-cluster ligand interactions to produce 1D-CS with desired connecting structures.

中文翻译:

了解和设计配体保护的金属纳米团簇的一维组件

如果我们希望将金属团簇用作磁性材料和偶极子材料,则有必要组装这些团簇以达到一定的材料尺寸。但是,目前适合组装的建筑群的类型非常有限,因此,关于组装金属群所需的因素以及此类组装结构的物理特性和功能的信息很少。在这项研究中,我们发现了硫醇盐(SR)保护的金铂合金(Au 4 Pt 2)团簇([Au 4 Pt 2(SR)8 ] 0)有以下四个点;(1)[Au 4 Pt 2(SR)8 ] 0是一种金属簇,可以用作构建基块,通过簇间Au-Au键(亲金键)形成一维(1D)连接结构(1D-CS );(2)尽管所有的[Au 4 Pt 2(SR)8 ] 0团簇都具有相似的结构,但是团簇内的配体相互作用根据配体的结构而变化。结果,[Au 4 Pt 2(SR)8 ] 0中的配体分布根据配体结构而变化;(3)配体分布的差异会影响簇间配体之间的相互作用,进而影响一维CS的形成并改变连接结构。(4)1D-CS的形成减小了簇的带隙。这些结果表明,我们需要设计集群内配体相互作用,以产生具有所需连接结构的1D-CS。
更新日期:2020-03-09
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