Volume 59, Issue 6 pp. 2309-2312
Communication

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

Xu-Shuang Han

Xu-Shuang Han

Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China

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Xinqi Luan

Xinqi Luan

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

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Dr. Hai-Feng Su

Dr. Hai-Feng Su

Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005 P. R. China

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Jiao-Jiao Li

Jiao-Jiao Li

Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China

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Dr. Shang-Fu Yuan

Dr. Shang-Fu Yuan

Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China

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Dr. Zhen Lei

Dr. Zhen Lei

Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China

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Prof. Dr. Yong Pei

Corresponding Author

Prof. Dr. Yong Pei

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

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Prof. Dr. Quan-Ming Wang

Corresponding Author

Prof. Dr. Quan-Ming Wang

Department of Chemistry, Tsinghua University, Beijing, 100084 P. R. China

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First published: 25 November 2019
Citations: 121

Graphical Abstract

Total determination: The total structure determination of an alkynyl-protected gold nanocluster, Au22(tBuC≡C)18, has been achieved. It consists of a Au13 cuboctahedron kernel and three [Au3(tBuC≡C)4] trimeric staples. The cluster displays strong thermochromic luminescence characterized as thermally activated delayed fluorescence.

Abstract

An alkynyl-protected gold nanocluster, Au22(tBuC≡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(tBuC≡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.

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