Veljković Filip, Kong Xianglei, Dimitrijević Stevan, Janković Marija, Janković Bojan, Dodevski Vladimir, Veličković Suzana
''VINČA" Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Belgrade, Serbia.
State Key Laboratory of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China.
Molecules. 2025 May 20;30(10):2227. doi: 10.3390/molecules30102227.
The stability of gold chloride clusters is an important topic in catalysis and nanomaterials, but experimental data are missing. Here, fourteen different clusters were obtained simultaneously using laser desorption/ionization mass spectrometry and were identified as AuCl (n = 1-5; m = 1, 3, 5, 7) or AuCl, AuCl, AuCl, AuCl and AuCl. Consequently, the effects of laser intensity on their stability were evaluated, considering differences in the AuCl unit or the number of Cl atoms. For the AuCl and AuCl groups, the relative intensity of the clusters decreased with each additional AuCl unit as the laser intensity increased. AuCl clusters showed a different trend in relative intensities: AuCl > AuCl > AuCl > AuCl. The mononuclear AuCl showed the highest stability, which is consistent with their "superhalogen" character. In the AuCl clusters, AuCl with Au (III)-Au(I) interaction was more stable at lower laser intensities, while AuCl with Au(I)-Au(I) bonds became more dominant at higher intensities. Among the AuCl, AuCl clusters, those with purely "aurophilic" interactions became increasingly stable with increasing laser intensity. These results emphasize the importance of bond type and cluster size for the stability of gold chloride clusters at different laser intensities.
氯化金团簇的稳定性是催化和纳米材料领域的一个重要课题，但目前缺乏实验数据。在此，利用激光解吸/电离质谱同时获得了14种不同的团簇，并将其鉴定为AuCl（n = 1 - 5；m = 1、3、5、7）或AuCl、AuCl、AuCl、AuCl和AuCl。因此，考虑到AuCl单元或Cl原子数量的差异，评估了激光强度对其稳定性的影响。对于AuCl和AuCl基团，随着激光强度的增加，每个额外的AuCl单元会使团簇的相对强度降低。AuCl团簇在相对强度上呈现出不同的趋势：AuCl > AuCl > AuCl > AuCl。单核AuCl表现出最高的稳定性，这与其“超卤素”特性一致。在AuCl团簇中，具有Au(III)-Au(I)相互作用的AuCl在较低激光强度下更稳定，而具有Au(I)-Au(I)键的AuCl在较高强度下变得更为占主导地位。在AuCl、AuCl团簇中，那些具有纯粹“亲金”相互作用的团簇随着激光强度的增加而变得越来越稳定。这些结果强调了键型和团簇尺寸对于不同激光强度下氯化金团簇稳定性的重要性。
