Silver nanoclusters containing Ag 0 atoms protected by amino acids were synthesized and characterized.C hiral superatomic silver nanoclusters [Ag 47 L 12 (CC t Bu) 16 ]BF 4 (L = l-/d -valine or l-/d -isoleucine) have been prepared by reducing AgCC t Bu and amino acids (AAs) with NaBH 4 .S ingle crystal X-ray diffraction revealed that these clusters have T symmetry,a nd the Ag 47 metal kernel can be viewed as at etracapped truncated tetrahedron (Ag 17 )s urrounded with six W-shaped Ag 5 units.T he clusters are homochirala s evidenced by CD measurements.Asfor the strong CD signals, large contributions are found from the occupied Ag s,ps tates (superatomic Dstates) near the Fermi level. Electron counting revealed that these clusters are 18-electron systems,s uggesting they are superatomic clusters.T he superatomic nature with a1 S 2 1P 6 1D 10 configuration was supported by DFT calculations.T his work paves the wayo ft aking AAs as facile chiral induction agents for the synthesis of metal nanoclusters.
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