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New Understanding on an Old Compound: Insights on the Origin of Chain Sequence Defects and Their Impact on the Electronic Structure of AuCN
Author(s) -
VelascoArias Donaji,
Mojica Rodrigo,
ZumetaDubé Inti,
RuízRuíz Fabían,
PuenteLee Iván,
Reguera Edilso
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100537
Subject(s) - chemistry , raman spectroscopy , grinding , crystallography , x ray photoelectron spectroscopy , sequence (biology) , chain (unit) , absorption (acoustics) , nanotechnology , chemical engineering , metallurgy , optics , materials science , biochemistry , physics , astronomy , engineering
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.