Isolation of the Au145(SR)60X compound (R = n-butyl, n-pentyl; X = Br, Cl): novel gold nanoclusters that exhibit properties subtly distinct from the ubiquitous icosahedral Au144(SR)60 compound,Nanoscale

当前位置： X-MOL 学术 › Nanoscale › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Isolation of the Au145(SR)60X compound (R = n-butyl, n-pentyl; X = Br, Cl): novel gold nanoclusters that exhibit properties subtly distinct from the ubiquitous icosahedral Au144(SR)60 compound
Nanoscale ( IF 5.8 ) Pub Date : 2021-09-01 , DOI: 10.1039/d1nr04745k
Tiziano Dainese ₁ , Sabrina Antonello ₁ , Sara Bonacchi ₁ , Daniel Morales-Martinez ₁ , Alfonso Venzo ₂ , David M Black ₃ , M Mozammel Hoque ₄ , Robert L Whetten ₄ , Flavio Maran _{1,

5}

Affiliation

We report the identification and quantitative isolation of Au₁₄₅(SR)₆₀X (R = n-butyl, n-pentyl; X = halide) along with elucidation of key properties as compared to the corresponding ubiquitous chiral-icosahedral Au₁₄₄(SR)₆₀ cluster known to have a central vacancy. The stoichiometries were assessed by electrospray mass spectrometry (ESI-MS) at isotopic resolution, and induced dissociation patterns indicate the ‘extra’ (Au,Br) atoms are strongly bound components of these structures. Voltammetric and spectroscopic characterization reveals Au₁₄₅(SR)₆₀X behaviors that are qualitatively similar to yet fascinatingly distinct from those of Au₁₄₄(SR)₆₀. (¹H,¹³C)-NMR spectra clearly show how both Au₁₄₅(SR)₆₀X and Au₁₄₄(SR)₆₀ are capped by 12 distinct ligand types of 5-fold equivalence, as was recently established for Au₁₄₄(SR)₆₀ capped by shorter ligands, demonstrating that this novel cluster shares the same chiral-icosahedral motif. Intriguingly, Au₁₄₅(SR)₆₀X is strongly near-IR luminescent, whereas under comparable conditions Au₁₄₄(SR)₆₀ barely emits. The photoluminescence pattern of Au₁₄₅(SR)₆₀X is very similar to that observed for Au₂₅(SR)₁₈, which contains the Au₁₃ core. The combined results are interpreted as consistent with neutral Au₁₄₅(SR)₆₀X as a diamagnetic species, electronically and structurally similar to the corresponding Au₁₄₄(SR)₆₀ compounds.

中文翻译：

Au145(SR)60X 化合物（R = 正丁基，正戊基；X = Br，Cl）的分离：新型金纳米团簇，其性质与无处不在的二十面体 Au144(SR)60 化合物略有不同

我们报告了 Au ₁₄₅ (SR) ₆₀ X（R =正丁基，正戊基；X = 卤化物）的鉴定和定量分离，并阐明了与相应无处不在的手性二十面体 Au ₁₄₄ (SR)相比的关键特性₆₀集群已知有一个中央空缺。在同位素分辨率下通过电喷雾质谱 (ESI-MS) 评估化学计量，诱导解离模式表明“额外”(Au,Br) 原子是这些结构的强结合成分。伏安和光谱表征显示 Au ₁₄₅ (SR) ₆₀X 行为在性质上与 Au ₁₄₄ (SR) _{60 的}行为相似但又截然不同。( ¹ H, ¹³ C)-NMR 光谱清楚地显示了 Au ₁₄₅ (SR) ₆₀ X 和 Au ₁₄₄ (SR) ₆₀如何被 12 种不同的 5 倍等效配体类型覆盖，正如最近为 Au ₁₄₄ (SR)建立的那样) ₆₀被较短的配体覆盖，表明这个新的簇共享相同的手性二十面体基序。有趣的是，Au ₁₄₅ (SR) ₆₀ X 具有很强的近红外发光，而在类似条件下 Au ₁₄₄ (SR) ₆₀几乎不发出。Au ₁₄₅ (SR) ₆₀ X的光致发光模式与观察到的 Au ₂₅ (SR) ₁₈非常相似，其中包含 Au ₁₃核。综合结果被解释为与作为抗磁性物质的中性 Au ₁₄₅ (SR) ₆₀ X一致，在电子和结构上与相应的 Au ₁₄₄ (SR) ₆₀化合物相似。

更新日期：2021-09-09

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11