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).
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11134389 | PMC |
| http://dx.doi.org/10.1021/jacsau.4c00152 | DOI Listing |
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