Strong Coupling and Slow Relaxation of the Magnetization for an Air-Stable [Co 4] Square with Both Tetrazine Radicals and Azido Bridges.

Zhilin Guo, Yi-Fei Deng, Zoe Pikramenou, Kim R Dunbar, Yuan-Zhu Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Introducing both tetrazine radical and azido bridges afforded two air-stable square complexes [M II 4(bpztz •-) 4(N 3) 4] (M II = Zn 2+, 1; Co 2+, 2; bpztz = 3,6-bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine), where the metal ions are cobridged by μ 1,1-azido bridges and tetrazine radicals. Magnetic studies revealed strong antiferromagnetic metal-radical interaction with a coupling constant of -64.7 cm -1 in the 2 J formalism in 2. Remarkably, 2 exhibits slow relaxation of magnetization with an effective barrier for spin reverse of 96 K at zero applied field.

Original languageEnglish
Pages (from-to)3651-3656
Number of pages6
JournalInorganic Chemistry
Volume60
Issue number6
DOIs
Publication statusPublished - 15 Mar 2021

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