Critical roles of metal–ligand complexes in the controlled synthesis of various metal nanoclusters

Ji Soo Kim, Hogeun Chang, Sungsu Kang, Seungwoo Cha, Hanguk Cho, Seung Jae Kwak, Namjun Park, Younhwa Kim, Dohun Kang, Chyan Kyung Song, Jimin Kwag, Ji-Sook Hahn, Won Bo Lee, Taeghwan Hyeon () and Jungwon Park ()
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Ji Soo Kim: Seoul National University
Hogeun Chang: Seoul National University
Sungsu Kang: Seoul National University
Seungwoo Cha: Seoul National University
Hanguk Cho: Seoul National University
Seung Jae Kwak: Seoul National University
Namjun Park: Seoul National University
Younhwa Kim: Seoul National University
Dohun Kang: Seoul National University
Chyan Kyung Song: Seoul National University
Jimin Kwag: Seoul National University
Ji-Sook Hahn: Seoul National University
Won Bo Lee: Seoul National University
Taeghwan Hyeon: Seoul National University
Jungwon Park: Seoul National University

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Metal nanoclusters (NCs), an important class of nanoparticles (NPs), are extremely small in size and possess quasi-molecular properties. Due to accurate stoichiometry of constituent atoms and ligands, NCs have strong structure-property relationship. The synthesis of NCs is seemingly similar to that of NPs as both are formed by colloidal phase transitions. However, they are considerably different because of metal-ligand complexes in NC synthesis. Reactive ligands can convert metal salts to complexes, actual precursors to metal NCs. During the complex formation, various metal species occur, having different reactivity and fraction depending on synthetic conditions. It can alter their degree of participation in NC synthesis and the homogeneity of final products. Herein, we investigate the effects of complex formation on the entire NC synthesis. By controlling the fraction of various Au species showing different reactivity, we find that the extent of complex formation alters reduction kinetics and the uniformity of Au NCs. We demonstrate that this concept can be universally applied to synthesize Ag, Pt, Pd, and Rh NCs.

Date: 2023
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DOI: 10.1038/s41467-023-38955-y

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