期刊
DALTON TRANSACTIONS
卷 49, 期 27, 页码 9208-9212出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt01888k
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资金
- Indian Institute of Science (IISc), Bangalore, India
- Science and Engineering Research Board (SERB) [SRG/2019/000317]
- Department of Science and Technology (DST-RFBR, Indo-Russia Joint Research Funding) [INT/RUS/RFBR/373]
- IISc [SG/MHRD-17-0014, SR/MHRD-17-0011]
- Ministry of Human Resource Development (MHRD), Govt. of India [SG/MHRD-17-0014, SR/MHRD-17-0011]
We present a unique investigation of a mononuclearcis-dicyanamido-cobalt(II) complex, [Co(L)(N(CN)(2))(2)] (1) (L=N,N'-di-tert-butyl-2,11-diaza[3,3](2,6)pyridinophane), which displays a reversible thermo-induced HS (S= 3/2) to LS (S = 1/2) Spin Crossover (SCO) with a T-1/2 value of around 238 K. The appropriate ligand field strength around the CoN6 coordination environment is obtained using a tetradentate ligand and two dicyanamide [N(CN)(2)](-) coligands at the cis position. Variable temperature XRD and several spectroscopic studies have been performed, which confirm the SCO behavior of 1. Interestingly, complex 1 pronounces redox stimulus responsive reversible spin-state switching from HS Co(II) to LS Co(III). These findings represent a rare example of the successful use of pseudohalide to design and synthesize a SCO cobalt(II) complex.
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