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Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters
Chen-jie Zeng1, Meng Zhou1, Chakicherla Gayathri1, Roberto R. Gil1, Matthew Y. Sfeir2, Rongchao Jin1
1.Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA;2.Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
Abstract:
Gold(I) thiolate compounds (i.e. AuI-SR) are important precursors for the synthesis of atomically precise Aun(SR)m nanoclusters. However, the nature of the AuI-SR precursor remains elusive. Here, we report that the Au10(TBBT)10 complex is a universal precursor for the synthesis of Aun(TBBT)m nanoclusters (where TBBT=4-tertbutylbenzenethiol/thiolate). Interestingly, the Au10(TBBT)10 complex is also found to be re-generated through extended etching of the Aun(SR)m nanoclusters with excess of TBBT thiol and O2. The formation of well-defined Au10(TBBT)10 complex, instead of polymeric AuI-SR, is attributed to the bulkiness of the TBBT thiol. Through 1D and 2D NMR characterization, the structure of Au10(TBBT)10 is correlated with the previously reported X-ray structure, which contains two inter-penetrated Au5(TBBT)5 rings. The photophysical property of Au10(TBBT)10 complex is further probed by femtosecond transient absorption spectroscopy. The accessibility of the precise Au10(TBBT)10 precursor improves the efficiency of the synthesis of the Aun(TBBT)m nanoclusters and is expected to further facilitate excellent control and understanding of the reaction mechanisms of nanocluster synthesis.
Key words:  Gold  Cluster  Optical
FundProject:This work was supported by the U.S. National Science Foundation (DMR-1808675). This research used resources of the Center for Functional Nanomaterials, which is a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract (No.DE-SC0012704).
Au10(TBBT)10:Aun(TBBT)m纳米团簇的起点与终点
曾晨婕1, 周蒙1, Chakicherla Gayathri1, Roberto R. Gil1, Matthew Y. Sfeir2, 金荣超1
1.美国卡内基梅隆大学化学系, 宾夕法尼亚州, 匹兹堡 15213;2.美国布鲁克海文国家实验室, 功能纳米材料中心, 纽约, 厄普顿 11973
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DOI:10.1063/1674-0068/31/cjcp1806141
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