Is the kernel-staples match a key-lock match?
Is the kernel-staples match a key-lock match?
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内核主食匹配是键锁匹配吗？
DOI：
10.1039/c7sc05019d
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发表时间：
2018-03-07
期刊：
影响因子：
8.4
通讯作者：
Wu Z
中科院分区：
文献类型：
--
作者：
Zhuang S;Liao L;Zhao Y;Yuan J;Yao C;Liu X;Li J;Deng H;Yang J;Wu Z
通过微妙的界面结构剪裁，我们证明了金属纳米团簇中存在同配体-同核-异结构的现象，并证明了它们的性质发生了显著变化。金属纳米团簇为理解金属纳米颗粒表面提供了极好的参考，由于原子精确表征的困难，金属纳米颗粒表面仍然是个谜。虽然在理解金属纳米团簇的结构方面已经取得了一些显著的进展，但仍不清楚内核-外钉钉匹配是否是钥匙锁匹配，以及表面钉扎对金属纳米团簇的某些性质有何影响。本文采用酸诱导法制备了一种新型的金纳米簇合物，经电喷雾质谱(ESI-MS)和单晶X-射线单晶分析(SCXC)确定其组成为Au42(TBBT)26(TBBT：4-叔丁基苯硫醚)。SCXC还揭示了Au42(TBBT)26与现有的金纳米簇Au44(TBBT)28具有相同的核而不同的钉，表明核-钉匹配不是钥匙锁匹配，金属纳米簇中同配体-同核-异钉钉现象的存在为理解金属纳米簇的生长或转变提供了一定的参考。进一步的实验表明，主链对金纳米团簇的稳定性有很大贡献，并影响其光致发光强度，界面结构的微小差异可以导致稳定性和光致发光的增强。
We demonstrated the existence of homo-ligand–homo-kernel–hetero-staples phenomenon in metal nanoclusters and the remarkable change in their properties by subtle interfacial structure tailoring. Metal nanoclusters provide excellent references for understanding metal nanoparticle surfaces, which remain mysterious due to the difficulty of atomically precise characterization. Although some remarkable advances have been achieved for understanding the structure of metal nanoclusters, it is still unknown if the inner kernel–outer staples match is a key–lock match and how the surface staples influence some of the properties of metal nanoclusters. Herein, we have developed an acid-induction method for synthesizing a novel gold nanocluster whose composition is determined to be Au42(TBBT)26 (TBBT: 4-tert-butylbenzenelthiolate) by ESI-MS and single-crystal X-ray crystallography (SCXC). SCXC also reveals that Au42(TBBT)26 has an identical kernel but different staples with an existing gold nanocluster Au44(TBBT)28, indicating that the kernel–staples match is not a key–lock match and the existence of homo-ligand–homo-kernel–hetero-staples phenomenon in metal nanoclusters provides some reference for understanding the growth or transformation of metal nanoclusters. Further experiments reveal that the staples greatly contribute to the stability of gold nanoclusters and influence their photoluminescence intensity and that minute differences in the interfacial structure can lead to enhanced stability and photoluminescence.
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影响因子：
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作者：
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