Homoleptic Alkynyl-Protected Gold Nanoclusters: Au44 (PhC≡C)28 and Au36 (PhC≡C)24

Xian-Kai Wan; Zong-Jie Guan; Quan-Ming Wang

doi:10.1002/anie.201706021

Homoleptic Alkynyl-Protected Gold Nanoclusters: Au₄₄ (PhC≡C)₂₈ and Au₃₆ (PhC≡C)₂₄

Angew Chem Int Ed Engl. 2017 Sep 11;56(38):11494-11497. doi: 10.1002/anie.201706021. Epub 2017 Aug 9.

Authors

Xian-Kai Wan^{1

2}, Zong-Jie Guan^{1

2}, Quan-Ming Wang^{1

2}

Affiliations

¹ Department of Chemistry, Tsinghua University, Beijing, 10084, P.R. China.
² Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P.R. China.

PMID: 28741296
DOI: 10.1002/anie.201706021

Abstract

For the first time total structure determination of homoleptic alkynyl-protected gold nanoclusters is reported. The nanoclusters are synthesized by direct reduction of PhC≡CAu, to give Au₄₄ (PhC≡C)₂₈ and Au₃₆ (PhC≡C)₂₄ . The Au₄₄ and Au₃₆ nanoclusters have fcc-type Au₃₆ and Au₂₈ kernels, respectively, as well as surrounding PhC≡C-Au-C₂ (Ph)Au-C≡CPh dimeric "staples" and simple PhC≡C bridges. The structures of Au₄₄ (PhC≡C)₂₈ and Au₃₆ (PhC≡C)₂₄ are similar to Au₄₄ (SR)₂₈ and Au₃₆ (SR)₂₄ , but the UV/Vis spectra are different. The protecting ligands influence the electronic structures of nanoclusters significantly. The synthesis of these two alkynyl-protected gold nanoclusters indicates that a series of gold nanoclusters in the general formula Au_x (RC≡C)_y as counterparts to Au_x (SR)_y can be expected.

Keywords: alkynyl ligands; cluster compounds; gold; nanostructures; optical properties.

Publication types

Research Support, Non-U.S. Gov't