Structure Determination of Alkynyl-Protected Gold Nanocluster Au22 (t BuC≡C)18 and Its Thermochromic Luminescence.
Xu-Shuang HanXinqi LuanHai-Feng SuJiao-Jiao LiShang-Fu YuanZhen LeiYong PeiQuan-Ming WangPublished in: Angewandte Chemie (International ed. in English) (2019)
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.