A low-nuclear Ag4 nanocluster as a customized catalyst for the cyclization of propargylamine with CO2

Lin Li, Ying Lv, Hongting Sheng (), Yonglei Du, Haifeng Li, Yapei Yun, Ziyi Zhang, Haizhu Yu () and Manzhou Zhu ()
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Lin Li: Anhui University
Ying Lv: Anhui University
Hongting Sheng: Anhui University
Yonglei Du: Anhui University
Haifeng Li: Anhui University
Yapei Yun: Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education
Ziyi Zhang: Anhui University
Haizhu Yu: Anhui University
Manzhou Zhu: Anhui University

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract The preparation of 2-Oxazolidinones using CO2 offers opportunities for green chemistry, but multi-site activation is difficult for most catalysts. Here, A low-nuclear Ag4 catalytic system is successfully customized, which solves the simultaneous activation of acetylene (-C≡C) and amino (-NH-) and realizes the cyclization of propargylamine with CO2 under mild conditions. As expected, the Turnover Number (TON) and Turnover Frequency (TOF) values of the Ag4 nanocluster (NC) are higher than most of reported catalysts. The Ag4* NC intermediates are isolated and confirmed their structures by Electrospray ionization (ESI) and 1H Nuclear Magnetic Resonance (1H NMR). Additionally, the key role of multiple Ag atoms revealed the feasibility and importance of low-nuclear catalysts at the atomic level, confirming the reaction pathways that are inaccessible to the Ag single-atom catalyst and Ag2 NC. Importantly, the nanocomposite achieves multiple recoveries and gram scale product acquisition. These results provide guidance for the design of more efficient and targeted catalytic materials.

Date: 2023
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DOI: 10.1038/s41467-023-42723-3

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