Structure Determination of Alkynyl-Protected Gold Nanocluster Au22 (t BuC≡C)18 and Its Thermochromic Luminescence

Xu-Shuang Han; Xinqi Luan; Hai-Feng Su; Jiao-Jiao Li; Shang-Fu Yuan; Zhen Lei; Yong Pei; Quan-Ming Wang

doi:10.1002/anie.201912984

Structure Determination of Alkynyl-Protected Gold Nanocluster Au₂₂ (^t BuC≡C)₁₈ and Its Thermochromic Luminescence

Angew Chem Int Ed Engl. 2020 Feb 3;59(6):2309-2312. doi: 10.1002/anie.201912984. Epub 2019 Dec 23.

Authors

Xu-Shuang Han¹, Xinqi Luan², Hai-Feng Su³, Jiao-Jiao Li¹, Shang-Fu Yuan¹, Zhen Lei¹, Yong Pei², Quan-Ming Wang¹

Affiliations

¹ Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
² Department Department of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Hunan Province, Xiangtan, 411105, P. R. China.
³ Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China.

PMID: 31769148
DOI: 10.1002/anie.201912984

Abstract

An alkynyl-protected gold nanocluster, Au₂₂ (^t BuC≡C)₁₈ (1), has been synthesized and its structure has been determined by single-crystal X-ray diffraction. The molecular structure consists of a Au₁₃ cuboctahedron kernel and three [Au₃ (^t BuC≡C)₄ ] trimeric staples. The cluster 1 has strong luminescence in the solid state with a 15 % quantum yield, and it displays interesting thermochromic luminescence as revealed by temperature-dependent emission spectra. The enhanced room-temperature emission is characterized as thermally activated delayed fluorescence.

Keywords: alkyne ligands; cluster compounds; gold; luminescence; structure elucidation.

Abstract

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