Slow Magnetic Relaxation and Spin‐Crossover Behavior in a Bicomponent Ion‐Pair Cobalt(II) Complex

A bicomponent ion‐pair molecule compound [Co(Brphterpy)2][Co(NCS)4]·2MeCN was designed and prepared for the construction of multistable functional materials. Due to the different coordination geometries of the cationic and anionic CoII ions, this compound exhibits both thermally induced spin crossov...

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Bibliographic Details
Published inEuropean journal of inorganic chemistry Vol. 2017; no. 33; pp. 3862 - 3867
Main Authors Shao, Dong, Deng, Lin‐Dan, Shi, Le, Wu, Dong‐Qing, Wei, Xiao‐Qin, Yang, Si‐Run, Wang, Xin‐Yi
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 08.09.2017
Subjects
Cobalt
Cobalt compounds
Inorganic chemistry
Ion pairs
Magnetic induction
Magnetic relaxation
Magnetism
Multifunctional materials
Single‐ion magnets
Spin crossover
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Summary:A bicomponent ion‐pair molecule compound [Co(Brphterpy)2][Co(NCS)4]·2MeCN was designed and prepared for the construction of multistable functional materials. Due to the different coordination geometries of the cationic and anionic CoII ions, this compound exhibits both thermally induced spin crossover (SCO) and field‐induced single‐ion magnetism (SIM). This represents a rare example of a two‐component system with the coexistence of SIM and SCO behaviors and suggests a simple, yet very efficient strategy for the construction of multistable molecular materials. A bicomponent ion‐pair compound with both octahedral and tetrahedral CoII centers were successfully synthesized and characterized. The octahedral CoII center undergoes a gradual and incomplete SCO, while the tetrahedral CoII center shows field‐induced single‐ion magnetic property. This simple ion‐pair strategy should be of great value for the construction of multistable molecular materials.
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.201700719