High-pressure dysprosium carbides containing carbon dimers, trimers, chains, and ribbons

Title data

Akbar, Fariia Iasmin ; Aslandukova, Alena ; Yin, Yuqing ; Aslandukov, Andrii ; Laniel, Dominique ; Bykova, Elena ; Bykov, Maxim ; Bright, Eleanor Lawrence ; Wright, Jonathan ; Comboni, Davide ; Hanfland, Michael ; Dubrovinskaia, Natalia ; Dubrovinsky, Leonid:
High-pressure dysprosium carbides containing carbon dimers, trimers, chains, and ribbons.
In: Carbon. Vol. 228 (2024) . - 119374.
ISSN 0008-6223
DOI: https://doi.org/10.1016/j.carbon.2024.119374

Official URL:

Abstract in another language

Exploring the chemistry of materials at high pressure leads to discoveries of previously unknown compounds and phenomena. Here chemical reactions between elemental dysprosium and carbon were studied in laser-heated diamond anvil cells at pressures up to 95 GPa and temperatures of ∼2800 K. In situ single-crystal synchrotron X-ray diffraction (SCXRD) analysis of the reaction products revealed the formation of novel dysprosium carbides, γ-DyC2, Dy5C9, and γ-Dy4C5, along with previously reported Dy3C2 and Dy4C3. The crystal structures of γ-DyC2 and Dy5C9 feature infinite flat carbon polyacene-like ribbons and cis-polyacetylene-type chains, respectively. In the structure of γ-Dy4C5, carbon atoms form dimers and non-linear trimers. Dy3C2 contains ethanide-type carbon dumbbells, and Dy4C3 is methanide featuring single carbon atoms. Density functional theory calculations reproduce well the crystal structures of high-pressure dysprosium carbides and reveal conjugated π-electron systems in novel infinite carbon polyanions. This work demonstrates that complex carbon homoatomic species previously unknown in organic chemistry can be synthesized at high pressures by direct reactions of carbon with metals.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	High-pressure; Diamond anvil cell; Rare-earth carbides; Carbides; Rare-earth elements; Dysprosium carbide
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Professor Materials Physics and Technology at Extreme Conditions Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Professor Materials Physics and Technology at Extreme Conditions > Professor Materials Physics and Technology at Extreme Conditions - Univ.-Prof. Dr. Natalia Doubrovinckaia
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	20 Sep 2024 07:31
Last Modified:	20 Sep 2024 07:31
URI:	https://eref.uni-bayreuth.de/id/eprint/90449