Synthesis, crystal structures, and magnetic properties of cyanide-bridged WVMnIII anionic coordination polymers containing divalent cationic moieties: Slow magnetic relaxations and spin crossover phenomenon

Jung Hee Yoon, Kwang Soo Lim, Dae Won Ryu, Woo Ram Lee, Sung Won Yoon, Byoung Jin Suh, Chang Seop Hong

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Two trimetallic coordination complexes were prepared by self-assembly of [W(CN)8]3- and the Mn(III) Schiff base followed by the addition of a Zn(II) or Fe(II) cationic unit. The octacyanotungstate connects neighboring Mn(III) centers to form a one-dimensional chain. The anionic chain requires cationic units of Zn(II) or Fe(II) to maintain charge balance in the structure. The Zn-containing complex shows ferrimagnetic behavior originating from the antiparallel alignment of W(V) and Mn(III) spins within the chain, which leads to slow magnetic relaxation at low temperatures. For the Fe(II)-containing compound, Fe(II) moieties are integrated into the ferrimagnetic chains, altering their spin states depending on the temperature. It appears that the coexistence of high- and low-spin states in the low temperature regime is responsible for the slower and faster relaxations of the magnetization.

Original languageEnglish
Pages (from-to)10437-10442
Number of pages6
JournalInorganic Chemistry
Volume53
Issue number19
DOIs
Publication statusPublished - 2014 Oct 6

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