Synthesis and Single Crystal X-ray Diffraction Structure of an Indium Arsenide Nanocluster
Synthesis and Single Crystal X-ray Diffraction Structure of an Indium Arsenide Nanocluster
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DOI：
10.1021/acscentsci.3c01451
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发表时间：
2024-02
影响因子：
18.2
通讯作者：
Soren F Sandeno;Sebastian Krajewski;R. Beck;Werner Kaminsky;Xiaosong Li;B. Cossairt
中科院分区：
文献类型：
--
作者：
Soren F Sandeno;Sebastian Krajewski;R. Beck;Werner Kaminsky;Xiaosong Li;B. Cossairt
在胶体量子点合成过程中，发现了作为中间体的幻数团簇，这使得人们能够深入了解形成途径，并为研究这些材料的结构和表面化学提供了原子级精确的分子平台。通过使用羧酸铟和As(SiMe3)3作为前驱体，已经开发出了单分散InAs量子点的合成方法，并且有文献记载其合成过程中会形成幻数中间体。在此，我们报道了一种在InAs量子点合成报告中普遍存在的InAs纳米团簇的合成、分离以及单晶X射线衍射结构。其结构In26As18(O2CR)24(PR'3)3与先前报道的半导体纳米团簇结构（即使是在III - V族内）有很大差异。然而，通过阴离子亚晶格，它在结构上可以与III - V和II - VI族团簇结构相关联。利用变温吸收光谱进行进一步分析以及计算的支持，加深了我们对所报道的结构以及整个InAs纳米材料的理解。
The discovery of magic-sized clusters as intermediates in the synthesis of colloidal quantum dots has allowed for insight into formation pathways and provided atomically precise molecular platforms for studying the structure and surface chemistry of those materials. The synthesis of monodisperse InAs quantum dots has been developed through the use of indium carboxylate and As(SiMe3)3 as precursors and documented to proceed through the formation of magic-sized intermediates. Herein, we report the synthesis, isolation, and single-crystal X-ray diffraction structure of an InAs nanocluster that is ubiquitous across reports of InAs quantum dot synthesis. The structure, In26As18(O2CR)24(PR'3)3, differs substantially from previously reported semiconductor nanocluster structures even within the III–V family. However, it can be structurally linked to III–V and II–VI cluster structures through the anion sublattice. Further analysis using variable temperature absorbance spectroscopy and support from computation deepen our understanding of the reported structure and InAs nanomaterials as a whole.