Wang Yitong, Gianopoulos Christopher G, Liu Zhongyu, Kirschbaum Kristin, Alfonso Dominic, Kauffman Douglas R, Jin Rongchao
Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.
Department of Chemistry and Biochemistry, University of Toledo, Toledo, Ohio 43606, United States.
JACS Au. 2024 Apr 16;4(5):1928-1934. doi: 10.1021/jacsau.4c00152. eCollection 2024 May 27.
An Au(S-Bu) nanocluster (NC) is synthesized using the bulky -butyl thiol as the ligand. Single-crystal X-ray crystallography reveals that it has an Au core which evolves from the Au core in the previously reported Au(S-Bu), and the Au core is protected by longer staple-like surface motifs. The new Au NC extends the members of the face-centered cubic structural evolution by adding an Au triangle and an Au tetrahedron unit. Additionally, it is found that Au emits near-infrared photoluminescence at 863 nm with a quantum yield (QY) of 4.3%, which is five times larger than that of Au(S-Bu)-the closest neighbor in the structural evolution pattern. The higher QY of Au is attributed to a larger radiative relaxation (), resulting from the structural effect. Finally, we find that the longer staple motifs lead to enhanced stability of Au(S-Bu) relative to Au(S-Bu).
使用叔丁基硫醇作为配体合成了一种金（S - Bu）纳米团簇（NC）。单晶X射线晶体学表明，它有一个金核，该金核由先前报道的Au（S - Bu）中的金核演化而来，并且金核由更长的钉状表面基序保护。这种新的金纳米团簇通过添加一个金三角形和一个金四面体单元扩展了面心立方结构演化的成员。此外，发现金在863nm处发射近红外光致发光，量子产率（QY）为4.3%，这比结构演化模式中最接近的邻居Au（S - Bu）大五倍。金的较高量子产率归因于结构效应导致的更大的辐射弛豫（）。最后，我们发现更长的钉状基序导致Au（S - Bu）相对于Au（S - Bu）的稳定性增强。
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