Chiral Superatomic Nanoclusters Ag47 Induced by the Ligation of Amino Acids

Wen Di Liu, Jia Qi Wang, Shang Fu Yuan, Xi Chen, Quan Ming Wang*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Silver nanoclusters containing Ag0 atoms protected by amino acids were synthesized and characterized. Chiral superatomic silver nanoclusters [Ag47L12(C≡CtBu)16]BF4 (L=l-/d-valine or l-/d-isoleucine) have been prepared by reducing AgC≡CtBu and amino acids (AAs) with NaBH4. Single crystal X-ray diffraction revealed that these clusters have T symmetry, and the Ag47 metal kernel can be viewed as a tetracapped truncated tetrahedron (Ag17) surrounded with six W-shaped Ag5 units. The clusters are homochiral as evidenced by CD measurements. As for the strong CD signals, large contributions are found from the occupied Ag s,p states (superatomic D states) near the Fermi level. Electron counting revealed that these clusters are 18-electron systems, suggesting they are superatomic clusters. The superatomic nature with a 1S21P61D10 configuration was supported by DFT calculations. This work paves the way of taking AAs as facile chiral induction agents for the synthesis of metal nanoclusters.

Original languageEnglish
JournalAngewandte Chemie - International Edition
DOIs
Publication statusE-pub ahead of print - 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • amino acids
  • chirality
  • cluster compounds
  • silver
  • superatoms

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