Ruan Chenhao, Xiang Huixin, Yan Hao, Deng Yuanxin, Zhao Yue, Xu Cong-Qiao, Li Jun, Yao Chuanhao
Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics (IFE) and Ningbo Institute of NPU, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China.
Strait Institute of Flexible Electronics, Fujian Normal University, Fuzhou, 350117, China.
Small. 2023 Dec;19(49):e2305056. doi: 10.1002/smll.202305056. Epub 2023 Aug 26.
Doping Cd atom(s) into gold clusters is very promising in both theoretical study and practical applications. However, it has long been a challenge to synthesize heavily Cd-doped AuCd bimetallic clusters and thereby reveal their structure-property correlations. Herein a novel AuCd bimetallic cluster: Au Cd (SC H ) (SC H denotes deprotonated cyclohexanethiol) with a Cd to Au atomic ratio of 1:1 is reported. The precise structure of the cluster determined by single crystal X-ray diffraction demonstrates that it has a unique hexatetrahedron Au core and a distinctive shell. Intriguingly, due to the special protecting motifs, the cluster exhibits high stability in various conditions studied, indicating that the geometric structure is crucial in determining the stability of the cluster. Most importantly, the photothermal property of the cluster has been investigated in comparison with those of M -kernel (M denotes metal atoms) clusters, and the results imply that the compactness and the Cd atom doping of the core play important roles in dictating the photothermal effect of the cluster. The authors believe that this work will provide some ideas for the rational design of clusters with high stability and excellent photothermal property.
将镉原子掺杂到金簇中在理论研究和实际应用方面都非常有前景。然而，长期以来，合成高镉掺杂的金镉双金属簇并揭示其结构-性质相关性一直是一项挑战。在此报道了一种新型的金镉双金属簇：Au₁Cd₁(SC₆H₁₁)₄（SC₆H₁₁表示去质子化的环己硫醇），其镉与金的原子比为1:1。通过单晶X射线衍射确定的簇的精确结构表明它具有独特的六四面体金核和独特的壳层。有趣的是，由于特殊的保护基序，该簇在所研究的各种条件下都表现出高稳定性，这表明几何结构在决定簇的稳定性方面至关重要。最重要的是，与M-核（M表示金属原子）簇相比，已经研究了该簇的光热性质，结果表明核的紧凑性和镉原子掺杂在决定簇的光热效应方面起着重要作用。作者认为这项工作将为合理设计具有高稳定性和优异光热性质的簇提供一些思路。
