Details

Autor(en) / Beteiligte

• Yi, Hong
• Osten, Kimberly M
• Levchenko, Tetyana I
• Veinot, Alex J
• Aramaki, Yoshitaka
• Ooi, Takashi
• Nambo, Masakazu
• Crudden, Cathleen M

Titel

Synthesis and enantioseparation of chiral Au nanoclusters protected by bis--heterocyclic carbene ligands

Ist Teil von

• Chemical science (Cambridge), 2021-08, Vol.12 (31), p.1436-144

Erscheinungsjahr

2021

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• A series of chiral Au 13 nanoclusters were synthesized via the direct reduction of achiral dinuclear Au( i ) halide complexes ligated by ortho -xylyl-linked bis- N -heterocyclic carbene (NHC) ligands. A broad range of functional groups are tolerated as wingtip substituents, allowing for the synthesis of a variety of functionalized chiral Au 13 nanoclusters. Single crystal X-ray crystallography confirmed the molecular formula to be [Au 13 (bisNHC) 5 Cl 2 ]Cl 3 , with a chiral helical arrangement of the five bidentate NHC ligands around the icosahedral Au 13 core. This Au 13 nanocluster is highly luminescent, with a quantum yield of 23%. The two enantiomers of the Au 13 clusters can be separated by chiral HPLC, and the isolated enantiomers were characterized by circular dichroism spectroscopy. The clusters show remarkable stability, including configurational stability, opening the door to further investigation of the effect of chirality on these clusters. A series of chiral Au 13 nanoclusters were synthesized via the direct reduction of achiral dinuclear Au( i ) halide complexes ligated by ortho -xylyl-linked bis- N -heterocyclic carbene (NHC) ligands.