Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Structure determination of a metastable Au22(SAdm)16 nanocluster and its spontaneous transformation into Au21(SAdm)15
Nanoscale ( IF 5.8 ) Pub Date : 2020-11-09 , DOI: 10.1039/d0nr07124b Qinzhen Li 1, 2, 3, 4 , Sha Yang 2, 3, 5, 6, 7 , Tao Chen 1, 2, 3, 4 , Shan Jin 2, 3, 5, 6, 7 , Jinsong Chai 2, 3, 5, 6, 7 , Hui Zhang 1, 2, 3, 4 , Manzhou Zhu 2, 3, 5, 6, 7
Nanoscale ( IF 5.8 ) Pub Date : 2020-11-09 , DOI: 10.1039/d0nr07124b Qinzhen Li 1, 2, 3, 4 , Sha Yang 2, 3, 5, 6, 7 , Tao Chen 1, 2, 3, 4 , Shan Jin 2, 3, 5, 6, 7 , Jinsong Chai 2, 3, 5, 6, 7 , Hui Zhang 1, 2, 3, 4 , Manzhou Zhu 2, 3, 5, 6, 7
Affiliation
|
It is of great interest to investigate the evolution pattern of gold nanoclusters (Au NCs) due to its significance in understanding the growth mechanism and origin of Au NCs. Capture of metastable cluster intermediates is an effective way to meet this demand since they provide valuable information for understanding the conversion pathway of Au NCs. However, it is still challenging to obtain metastable Au NCs, especially thiol-protected Au NCs, and solve their structures. In this work, a metastable thiol-protected gold nanocluster, Au22(SAdm)16 (Au22), was synthesized and its structure was determined by single crystal X-ray diffraction. Au22 shows a close structure-evolution correlation with Au21(SAdm)15 (Au21). The symmetric Au10 kernel of Au21 is twisted by the insertion of an additional Au-SR unit on the motif during its structure evolution into Au22. The distortion in structures results in significantly distinguishing absorption and emission spectra between Au22 and Au21. Noteworthily, the structure correlation between Au22 and Au21 was also found experimentally that Au22 can spontaneously transform into Au21 due to the metastability of Au22 in solution. This size conversion process was monitored by time-dependent UV-vis spectroscopy and ESI-MS. Furthermore, the solvent effect on the size conversion process was also investigated. This transformation from Au22 to Au21 provides a unique platform for studies on the evolution pattern of gold nanoclusters at the single atom level.
中文翻译：
亚稳态Au22（SAdm）16纳米团簇的结构确定及其自发转变为Au21（SAdm）15
研究金纳米团簇（Au NCs）的演化模式非常重要，因为它对理解Au NCs的生长机理和起源具有重要意义。捕获亚稳态簇中间体是满足此需求的有效方法，因为它们为了解Au NCs的转化途径提供了有价值的信息。然而，获得亚稳态的Au NCs，尤其是硫醇保护的Au NCs，并解决其结构仍然具有挑战性。在这项工作中，合成了亚稳态的巯基保护的金纳米簇Au 22（SAdm）16（Au 22），并通过单晶X射线衍射确定了其结构。Au 22与Au 21（SAdm）的结构演化密切相关15（Au 21）。在结构演变成Au 22的过程中，通过在模体上插入一个额外的Au-SR单元，扭曲了Au 21的对称Au 10核。结构的扭曲导致Au 22和Au 21之间的吸收光谱和发射光谱明显区分开。值得注意的是，还通过实验发现Au 22和Au 21之间的结构相关性是由于Au 22的亚稳定性，Au 22可以自发转变为Au 21在解决方案中。该尺寸转换过程通过时变紫外可见光谱和ESI-MS进行监控。此外，还研究了溶剂对尺寸转化过程的影响。从Au 22到Au 21的这种转变为研究金纳米团簇在单原子水平上的演化模式提供了独特的平台。
更新日期：2020-11-23
中文翻译：
亚稳态Au22（SAdm）16纳米团簇的结构确定及其自发转变为Au21（SAdm）15
研究金纳米团簇（Au NCs）的演化模式非常重要，因为它对理解Au NCs的生长机理和起源具有重要意义。捕获亚稳态簇中间体是满足此需求的有效方法，因为它们为了解Au NCs的转化途径提供了有价值的信息。然而，获得亚稳态的Au NCs，尤其是硫醇保护的Au NCs，并解决其结构仍然具有挑战性。在这项工作中，合成了亚稳态的巯基保护的金纳米簇Au 22（SAdm）16（Au 22），并通过单晶X射线衍射确定了其结构。Au 22与Au 21（SAdm）的结构演化密切相关15（Au 21）。在结构演变成Au 22的过程中，通过在模体上插入一个额外的Au-SR单元，扭曲了Au 21的对称Au 10核。结构的扭曲导致Au 22和Au 21之间的吸收光谱和发射光谱明显区分开。值得注意的是，还通过实验发现Au 22和Au 21之间的结构相关性是由于Au 22的亚稳定性，Au 22可以自发转变为Au 21在解决方案中。该尺寸转换过程通过时变紫外可见光谱和ESI-MS进行监控。此外，还研究了溶剂对尺寸转化过程的影响。从Au 22到Au 21的这种转变为研究金纳米团簇在单原子水平上的演化模式提供了独特的平台。
京公网安备 11010802027423号