First Molecular Superconductor with the Tris(Oxalato)Aluminate Anion, β″-(BEDT-TTF)4(H3O)Al(C2O4)3·C6H5Br, and Isostructural Tris(Oxalato)Cobaltate and Tris(Oxalato)Ruthenate Radical Cation Salts

Blundell, Toby; Brannan, Michael; Mburu-Newman, Joey; Akutsu, Hiroki; Nakazawa, Yasuhiro; Imajo, Shusaku; Martin, Lee

Abstract

Peter Day’s research group reported the first molecular superconductor containing paramagnetic metal ions in 1995, β″-(BEDT-TTF)4(H3O)Fe(C2O4)3·C6H5CN. Subsequent research has produced a multitude of BEDT-TTF-tris(oxalato)metallate salts with a variety of structures and properties, including 32 superconductors to date. We present here the synthesis, crystal structure, and conducting properties of the newest additions to the Day series including the first superconductor incorporating the diamagnetic tris(oxalato)aluminate anion, β″-(BEDT-TTF)4(H3O)Al(C2O4)3·C6H5Br, which has a superconducting Tc of ~2.5 K. β″-(BEDT-TTF)4(H3O)Co(C2O4)3·C6H5Br represents the first example of a β″ phase for the tris(oxalato)cobaltate anion, but this salt does not show superconductivity.

Citation

Blundell, T., Brannan, M., Mburu-Newman, J., Akutsu, H., Nakazawa, Y., Imajo, S., & Martin, L. (2021). First Molecular Superconductor with the Tris(Oxalato)Aluminate Anion, β″-(BEDT-TTF)4(H3O)Al(C2O4)3·C6H5Br, and Isostructural Tris(Oxalato)Cobaltate and Tris(Oxalato)Ruthenate Radical Cation Salts. Magnetochemistry, 7(7), Article 90. https://doi.org/10.3390/magnetochemistry7070090

• Journal Article Type: Article
• Acceptance Date: Jun 18, 2021
• Online Publication Date: Jun 22, 2021
• Publication Date: 2021-07
• Deposit Date: Nov 30, 2023
• Journal: Magnetochemistry
• Electronic ISSN: 2312-7481
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 7
• Article Number: 90
• DOI: https://doi.org/10.3390/magnetochemistry7070090
• Public URL: https://durham-repository.worktribe.com/output/1963797