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Networked Spin Cages: Tunable Magnetism and Lithium Ion Storage via Modulation of Spin-Electron Interactions
journal contribution
posted on 2016-09-09, 11:34 authored by Guo-Hong Ning, Bingbing Tian, Li-Min Tan, Zijing Ding, Tun Seng Herng, Jun Ding, Kian Ping LohA networked spin
cage comprising infinite CoII6L4 cages
arrays (where Co = Co(NCS)2 and L = 1,3,5-tri-(4-pyridyl)-verdazal
radical) is synthesized and found to exhibit tunable magnetic and
electrochemical properties via inclusion of guests. SQUID investigation
reveals the coexistence of ferromagnetic and anti-ferromagnetic interactions
between the Co(II) ion center and radical ligands. Inclusion of electron-deficient
guests (e.g., tetracyanoethylene) dramatically enhances spin concentration
and increases anti-ferromagnetic interactions due to the formation
of charge-transfer complex between the host and the guest. In addition,
introduction of electron-rich guests (e.g., tetrathiafulvalene) into
the networked spin cages doubles the capacity for binding the lithium
ions.
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Keywords
Co II 6 L 4 cages arrayscages doubleselectron-deficient guestsNetworked Spin CagesSpin-Electron InteractionsnetworkedSQUID investigationanti-ferromagnetic interactionsTunable Magnetisme.gLithium Ion Storageexhibit tunableelectron-rich guestselectrochemical propertiesincreases anti-ferromagnetic interactionslithium ions
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