Chen-jie Zeng, Meng Zhou, Chakicherla Gayathri, Roberto R. Gil, Matthew Y. Sfeir, Rongchao Jin. Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 555-562. doi: 10.1063/1674-0068/31/cjcp1806141
Citation: Chen-jie Zeng, Meng Zhou, Chakicherla Gayathri, Roberto R. Gil, Matthew Y. Sfeir, Rongchao Jin. Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 555-562. doi: 10.1063/1674-0068/31/cjcp1806141

Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters

doi: 10.1063/1674-0068/31/cjcp1806141
  • Received Date: 2018-06-14
  • 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.
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Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters

doi: 10.1063/1674-0068/31/cjcp1806141

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.

Chen-jie Zeng, Meng Zhou, Chakicherla Gayathri, Roberto R. Gil, Matthew Y. Sfeir, Rongchao Jin. Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 555-562. doi: 10.1063/1674-0068/31/cjcp1806141
Citation: Chen-jie Zeng, Meng Zhou, Chakicherla Gayathri, Roberto R. Gil, Matthew Y. Sfeir, Rongchao Jin. Au10(TBBT)10: the Begining and the End of Aun(TBBT)m Nanoclusters[J]. Chinese Journal of Chemical Physics , 2018, 31(4): 555-562. doi: 10.1063/1674-0068/31/cjcp1806141
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