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

doi:10.1021/ic501506s

Synthesis, crystal structures, and magnetic properties of cyanide-bridged W^VMn^III 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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 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 language	English
Pages (from-to)	10437-10442
Number of pages	6
Journal	Inorganic Chemistry
Volume	53
Issue number	19
DOIs	https://doi.org/10.1021/ic501506s
Publication status	Published - 2014 Oct 6

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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Yoon, J. H., Lim, K. S., Ryu, D. W., Lee, W. R., Yoon, S. W., Suh, B. J., & Hong, C. S. (2014). Synthesis, crystal structures, and magnetic properties of cyanide-bridged W^VMn^III anionic coordination polymers containing divalent cationic moieties: Slow magnetic relaxations and spin crossover phenomenon. Inorganic Chemistry, 53(19), 10437-10442. https://doi.org/10.1021/ic501506s

Synthesis, crystal structures, and magnetic properties of cyanide-bridged W^VMn^III anionic coordination polymers containing divalent cationic moieties: Slow magnetic relaxations and spin crossover phenomenon. / Yoon, Jung Hee; Lim, Kwang Soo; Ryu, Dae Won et al.
In: Inorganic Chemistry, Vol. 53, No. 19, 06.10.2014, p. 10437-10442.

Research output: Contribution to journal › Article › peer-review

Yoon, JH, Lim, KS, Ryu, DW, Lee, WR, Yoon, SW, Suh, BJ & Hong, CS 2014, 'Synthesis, crystal structures, and magnetic properties of cyanide-bridged W^VMn^III anionic coordination polymers containing divalent cationic moieties: Slow magnetic relaxations and spin crossover phenomenon', Inorganic Chemistry, vol. 53, no. 19, pp. 10437-10442. https://doi.org/10.1021/ic501506s

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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.",

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