Journal
DALTON TRANSACTIONS
Volume 47, Issue 46, Pages 16596-16602Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt03783c
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Funding
- National Natural Science Foundation [21601070, 51672114, 21701046, 21501073]
- China Postdoctoral Science Foundation [2016M601751]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1601037B]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province [16KJB150012]
- National Science Foundation [DMR-1157490]
- State of Florida
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Although a great number of single-ion magnets (SIMs) and spin-crossover (SCO) compounds have been discovered, multifunctional materials with the combination of SCO and SIM properties are extremely scarce. Here magnetic studies have been carried out for a mononuclear, five-coordinate cobalt(ii) complex [Co(3,4-lut)(4)Br]Br (1) with square pyramidal geometry. Direct-current magnetic measurement confirms the spin transition between the S = 1/2 and 3/2 states in the range of 150-290 K with a small hysteresis loop. Frequency- and temperature-dependent alternating-current magnetic susceptibility reveals slow magnetization relaxation under an applied dc field of 3000 Oe. The work here presents the first instance of the five-coordinate mononuclear cobalt(ii)-based SIM exhibiting the thermally induced complete SCO.
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