Synergistic Effects of Pt and Cd Codoping to Icosahedral Au13 Superatoms
Synergistic Effects of Pt and Cd Codoping to Icosahedral Au13 Superatoms
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DOI：
10.1021/acs.jpcc.0c06765
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发表时间：
2020-10-29
影响因子：
3.7
通讯作者：
Tsukuda, Tatsuya
中科院分区：
文献类型：
--
作者：
Suyama, Megumi;Takano, Shinjiro;Tsukuda, Tatsuya
我们合成了一个新的三金属簇合物[PtCdAu 23（SC2 H4 Ph）（18）]（-），它具有一个二十面体的Pt @ CdAu 11超原子核，核中有8个电子，并研究了X族和XII族原子的共掺杂对[Au-25（SC2 H4 Ph）（18）]（-）的Au@Au-12超原子核的电子结构和光学性质的影响.光谱和电化学测量表明，Pt @ CdAu 11的HOMO-LUMO（HL）能隙比Au@Au-12的大，光致发光量子产率（PLQY）比Au@Au-12的大46倍.为了阐明共掺杂效应的起源，对分别具有Au @ CdAu 11和Pt@Au-12超原子核的单掺杂团簇[CdAu 24（SC2 H4 Ph）（18）]（0）和[PtAu 24（SC2 H4 Ph）（18）]（2-）进行了比较。结果表明，Pt的掺杂是Pt@CdAu11的HL带隙增大的主要原因，而Pt和Cd的掺杂则协同提高了Pt@CdAu11的PLQY.
We synthesized a new trimetallic cluster [PtCdAu23(SC2H4Ph)(18)](-), which has an icosahedral Pt@CdAu11 superatomic core with eight electrons, and investigated how the electronic structure and optical properties of the Au@Au-12 superatomic core of [Au-25(SC2H4Ph)(18)](-) are affected by codoping of group X and XII atoms. Spectroscopic and electrochemical measurements showed that the HOMO-LUMO (HL) gap of Pt@CdAu11 is larger than that of Au@Au-12 and that the photoluminescence quantum yield (PLQY) of Pt@CdAu11 is 46 times larger than that of Au@Au-12. To shed light on the origin of the codoping effects, a comparison was made with monodoped clusters [CdAu24(SC2H4Ph)(18)](0) and [PtAu24(SC2H4Ph)(18)](2-) having the Au@CdAu11 and Pt@Au-12 superatomic cores, respectively. The results revealed that the increment of the HL gap of Pt@CdAu11 is mainly because of Pt doping, while the doping of Pt and Cd synergistically enhances the PLQY of Pt@CdAu11.