Strong coupling and slow relaxation of the magnetization for an air-stable [Co4] 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 [MII4(bpztz•–)4(N3)4] (MII = Zn2+, 1; Co2+, 2; bpztz = 3,6-bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine), where the metal ions are cobridged by μ1,1-azido bridges and tetrazine radicals. Magnetic studies revealed strong antiferromagnetic metal–radical interaction with a coupling constant of −64.7 cm–1 in the 2J 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
Early online date3 Mar 2021
DOIs
Publication statusPublished - 15 Mar 2021

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