Author, as appears in the article.: Qiu, Jiawei; Abella, Laura; Du, Xiya; Cao, Zhengkai; He, Zhiwen; Meng, Qingyu; Yan, Yingjing; Poblet, Josep M; Sun, Lei; Rodriguez-Fortea, Antonio; Chen, Ning
Department: Química Física i Inorgànica
URV's Author/s: Abella Guzman, Laura / Poblet Rius, Josep Maria / Rodríguez Fortea, Antonio
Keywords: Stable compound Relaxation Pulsed esr Mg-mg Metallofullerene Electronic-structure Crystallographic evidence Complexes Cluste Approximation
Abstract: Metal-metal bonding is crucial in chemistry for advancing our understanding of the fundamental aspects of chemical bonds. Metal-metal bonds based on alkaline-earth (Ae) elements, especially the heavier Ae elements (Ca, Sr, and Ba), are rarely reported due to their high electropositivity. Herein, we report two heteronuclear di-EMFs CaY@C-s(6)-C-82 and CaY@C-2v(5)-C-80, which contain unprecedented single-electron Ca-Y metal-metal bonds. These compounds were characterized by single-crystal X-ray crystallography, electron paramagnetic resonance (EPR) spectroscopy, and DFT calculations. The crystallographic study of CaY@C-s(6)-C-82 shows that Ca and Y are successfully encapsulated into the carbon cage with a Ca-Y distance of 3.691 & Aring;. The CW-EPR study of both CaY@C-s(6)-C-82 and CaY@C-2v(5)-C-80 exhibits a doublet, suggesting the presence of an unpaired electron located between Ca and Y. The combined experimental and theoretical results confirm the presence of a Ca-Y single-electron metal-metal bond with substantial covalent interaction, attributed to significant overlap between the 4s4p orbitals of Ca and the 5s5p4d orbitals of Y. Furthermore, pulse EPR spectroscopy was used to investigate the quantum coherence of the electron spin within this bond. The unpaired electron, characterized by its s orbital nature, is effectively protected by the carbon cage, resulting in efficient suppression of both spin-lattice relaxation and decoherence. CaY@C-s(6)-C-82 behaves as an electron spin qubit, displaying a maximum decoherence time of 7.74 mu s at 40 K. This study reveals an unprecedented Ae-rare-earth metal-metal bond stabilized by the fullerene cages and elucidates the molecular qubit properties stemming from their unique bonding character, highlighting their potential in quantum information processing applications.
Thematic Areas: Química Materiais Interdisciplinar General chemistry Farmacia Engenharias iv Engenharias iii Engenharias ii Colloid and surface chemistry Ciências biológicas ii Ciências biológicas i Ciências agrárias i Ciência de alimentos Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemistry Catalysis Biochemistry Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: laura.abella@urv.cat josepmaria.poblet@urv.cat antonio.rodriguezf@urv.cat
Author identifier: 0000-0002-4533-0623 0000-0001-5884-5629
Record's date: 2025-01-08
Paper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Paper original source: Journal Of The American Chemical Society. 146 (35): 24310-24319
APA: Qiu, Jiawei; Abella, Laura; Du, Xiya; Cao, Zhengkai; He, Zhiwen; Meng, Qingyu; Yan, Yingjing; Poblet, Josep M; Sun, Lei; Rodriguez-Fortea, Antonio; Ch (2024). CaY@C2n : Exploring Molecular Qubits with Ca-Y Metal-Metal Bonds. Journal Of The American Chemical Society, 146(35), 24310-24319. DOI: 10.1021/jacs.4c04720
Entity: Universitat Rovira i Virgili
Journal publication year: 2024
Publication Type: Journal Publications
Repositori URV