Abstract
Alloyed nanoclusters have been widely reported, but controllable synthesis of predesigned nanoclusters with specific structures remains challenging. We used [Cu(MeCN)4]PF6 intercept (AgtBuC≡C)n polymer to form Ag(I)-Cu(II) oligomer precursors which serve as the starting point of co-reduction reaction, leading to the generation of a new [Ag8Cu7(tBuC≡C)12]PF6 (Ag8Cu7) nanocluster. Single-crystal diffraction result reveals its Cu@Ag8@Cu6(tBuC≡C)12 three-layer structure similar to the previously reported Ag9Cu6 nanocluster except for the different core atom and shorter bond distance around. The identification of Ag8Cu7 was further confirmed by ESI-MS, XPS, PXRD, and TG characterizations. Besides, the nonemissive Ag8Cu7 cluster was subject to ligand exchange of bulky ligand 3,5-bis(trifluoromethyl)phenylacetylide (ArC ≡ CH) giving a novel Ag10Cu4(ArC ≡ C)14(DPPB)2 (Ag10Cu4) with a 634 nm red light emission, which provides another example of the breakage-reassembly mechanism.
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Detailed crystal data and structure refinements for the two compounds are given in Tables S3-S6 and Figures S5-S6. CCDC 2319426-2319427 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data_request/cif.
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Acknowledgements
We gratefully acknowledge financial support from the National Natural Science Foundation of China (No. 52302138) and Natural Science Foundation of Henan (232300420405). We thank the staff in the Analytical and Testing Center at the Henan University of Engineering for all related measurements.
Funding
This work was supported by the National Natural Science Foundation of China (No. 52302138) and Natural Science Foundation of Henan (232300420405).
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Shen Yanglin designed the main experiments and wrote the paper, Liu Dan accomplished the synthesis of clusters and single crystals, and Li Xiu resolved the single crystal data. All authors reviewed the manuscript.
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Shen, YL., Liu, D. & Li, X. Homoleptic Alkynyl-Protected [Ag8Cu7(tBuC≡C)12]+ Nanoclusters: Synthesis, Structure and Ligand Exchange Induced Transformation. J Clust Sci (2024). https://doi.org/10.1007/s10876-024-02630-z
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DOI: https://doi.org/10.1007/s10876-024-02630-z