He Lizhong, He Xinhai, Wang Junbo, Fu Chong, Liang Junhao
School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, P. R. China.
Inorg Chem. 2021 Jun 21;60(12):8404-8408. doi: 10.1021/acs.inorgchem.1c00303. Epub 2021 Jun 2.
The field of cocrystalline nanoclusters stabilized by thiolates is in a period of rapid development. However, the types of cocrystallization have been limited to a few reported until now, so it is of great importance to investigate and understand the novel cocrystallographic structures. Herein, we design and synthesize a new type of cocrystallization, [AgAu(2-EBT)AgAu(2-EBT)][2(PPh)], characterized by thermogravimetric analysis, X-ray photoelectron spectroscopy, and single-crystal X-ray crystallography. Interestingly, both of the cocrystallized nanoclusters show the same outer-shell geometric structure but diffenent cores (AgAu vs AgAu). The cocrystal lattice exhibits a multilayer structure in which both of the cocrystallized nanoclusters and the counterion assemble in a layer-by-layer model. Meanwhile, the counterion is found to be critical for formation and stabilization of the target cocrystal. In addition, the target cocrystal shows high thermal stability, and this result possibly originates from the electrostatic and weak interactions in the cocrystals.
由硫醇盐稳定的共晶纳米团簇领域正处于快速发展阶段。然而，到目前为止，共结晶类型仅限于少数已报道的情况，因此研究和理解新型共结晶结构非常重要。在此，我们设计并合成了一种新型共结晶物[AgAu(2-EBT)AgAu(2-EBT)][2(PPh)]，通过热重分析、X射线光电子能谱和单晶X射线晶体学对其进行了表征。有趣的是，两种共结晶纳米团簇都具有相同的外壳几何结构，但核心不同（AgAu与AgAu）。共晶晶格呈现出多层结构
