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Alkynyl-Protected Au22(C≡CR)18 Clusters Featuring New Interfacial Motifs and R-Dependent Photoluminescence
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2019-10-25 , DOI: 10.1021/acs.jpclett.9b02920
Shun Ito 1 , Shinjiro Takano 1 , Tatsuya Tsukuda 1, 2
Affiliation  

A series of homoleptic alkynyl-protected gold clusters Au22(C≡CR)18 were newly synthesized using 3-ethynylthiophene (ETP-H), phenylacetylene (PA-H), 3-ethynyltoluene (ET-H), and 3-ethynylanisole (EA-H). Single-crystal X-ray diffraction analysis on Au22(ETP)18 revealed that a bitetrahedral Au7 core is protected by novel Au3(ETP)4 oligomers and a Au6(ETP)6 ring, composed of R–C≡C–Au(I)–C≡C–R units bridged by π–Au−π bonds. UV–visible and 1H NMR spectroscopy revealed that the R groups did not affect the geometric and electronic structures of Au22(C≡CR)18, whereas the photoluminescence quantum yield was dependent on the R group and showed the highest value of 4.6% when R = Ph.

中文翻译:

炔基保护的Au 22(C≡CR)18团簇具有新的界面基序和R依赖的光致发光

使用3-乙炔基噻吩(ETP-H),苯乙炔(PA-H),3-乙炔基甲苯(ET-H)和3-乙炔基苯甲醚新合成了一系列由乙炔基保护的均化均金簇Au 22(C≡CR)18(EA-H)。在Au 22(ETP)18上进行单晶X射线衍射分析表明,二面体Au 7核受到新型Au 3(ETP)4低聚物和由R–C≡C组成的Au 6(ETP)6环的保护。 –Au(I)–C≡C–R单元通过π–Au-π键桥接。紫外可见和1 H NMR光谱显示,R基团不影响Au 22(C≡CR)的几何和电子结构参见图18,而光致发光量子产率取决于R基团,并且当R = Ph时显示出4.6%的最高值。
更新日期:2019-10-25
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