Networked Spin Cages: Tunable Magnetism and Lithium Ion Storage via Modulation of Spin-Electron Interactions.
A networked spin cage comprising infinite CoII6L4cages arrays (where Co = Co(NCS)2and 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.
Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.
Guo-Hong
GH
Ning
Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.|SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China.
Bingbing
B
Tian
Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.
Li-Min
LM
Tan
Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.|SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China.
Zijing
Z
Ding
Department of Materials Science & Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore.
Tun Seng
TS
Herng
Department of Materials Science & Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore.
Jun
J
Ding
Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543, Singapore.
Kian Ping
KP
Loh