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 journalArticle

7 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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Magnetic relaxation
magnetic relaxation
Cyanides
cyanides
coordination polymers
Magnetic properties
crossovers
Polymers
Crystal structure
magnetic properties
crystal structure
Temperature
synthesis
Schiff Bases
Coordination Complexes
Self assembly
Magnetization
imines
self assembly
alignment

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Synthesis, crystal structures, and magnetic properties of cyanide-bridged WVMnIII anionic coordination polymers containing divalent cationic moieties : Slow magnetic relaxations and spin crossover phenomenon. / Yoon, Jung Hee; Lim, Kwang Soo; Ryu, Dae Won; Lee, Woo Ram; Yoon, Sung Won; Suh, Byoung Jin; Hong, Chang Seop.

In: Inorganic Chemistry, Vol. 53, No. 19, 06.10.2014, p. 10437-10442.

Research output: Contribution to journalArticle

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AU - Yoon, Jung Hee

AU - Lim, Kwang Soo

AU - Ryu, Dae Won

AU - Lee, Woo Ram

AU - Yoon, Sung Won

AU - Suh, Byoung Jin

AU - Hong, Chang Seop

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AB - 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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