Ma Along, Wang Jiawei, Kong Jie, Ren Yonggang, Wang Yuxuan, Ma Xiaoshuang, Zhou Meng, Wang Shuxin
College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, P. R. China.
Hefei National Research Center for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
Phys Chem Chem Phys. 2023 Apr 5;25(14):9772-9778. doi: 10.1039/d3cp00459g.
Nanocluster photoluminescence (PL) has important practical applications and its rationalization is therefore of significant interest. Here, we report the synthesis, structure determination and photoluminescence of AuAg(TPP)(SR)Cl (TPP = triphenylphosphine, SR = 3, 5-bis(trifluoromethyl)thiophenol, denoted as Au10Ag17). Au10Ag17 exhibited a low photoluminescence quantum yield (PLQY) of 2.8%, which could be increased 15-fold by removing the two terminal silver atoms to give AgAu(SR)(TPP)Cl ( = 11-13, SR = 2-phenylethylmercaptan, abbrev. Au12Ag13). The discovery of such a PL switch constitutes an interesting opportunity to further understand the origin of fluorescence in nanoclusters.
纳米团簇光致发光（PL）具有重要的实际应用，因此对其进行合理化研究具有重大意义。在此，我们报道了AuAg(TPP)(SR)Cl（TPP = 三苯基膦，SR = 3,5 - 双（三氟甲基）苯硫酚，记为Au10Ag17）的合成、结构测定及光致发光特性。Au10Ag17的光致发光量子产率（PLQY）较低，为2.8%，通过去除两个末端银原子得到AgAu(SR)(TPP)Cl（= 11 - 13，SR = 2 - 苯乙硫醇，缩写为Au12Ag13），其PLQY可提高15倍。这种PL开关的发现为进一步理解纳米团簇中荧光的起源提供了一个有趣的契机。
