Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 2021, Issue 36, Pages 3742-3751Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202100537
Keywords
AuCN; Defects; Gold cyanide; Mechanical milling; XPS; Raman spectra
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Funding
- Laboratorio Nacional de Conversion y Almacenamiento de Energia (LNCAE)
- CONACyT Project [315800]
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This study investigates the structural defects in 1D AuCN induced by mechanical grinding, revealing that the CN-Au-CN and CN-Au-NC sequences become disordered while the NC-Au-CN sequence becomes ordered. Atomic chains are preferentially disrupted at the Au-N bond during the grinding process, leading to significant changes in the UV-vis absorption spectrum of AuCN.
Gold cyanide, AuCN, despite its simple formula unit, has surprising structural features not completely understood to date. The present contribution discusses the results of a structural study on the nature of defects found in 1D AuCN when submitted to mechanical grinding. This is an appropriate treatment to induce structural defects in that solid, which were identified for the first time by combining XRD, XPS, Raman, and UV-vis techniques. Furthermore, it is striking that the CN-Au-CN and CN-Au-NC sequences get disordered upon grinding while the NC-Au-CN gets ordered. Additionally, it is shown that the atomic chains apart from getting unraveled during the grinding process, are preferentially disrupted at the Au-N bond. The induced defects have a large impact on the UV-vis absorption spectrum of AuCN.
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