A three-dimensional ferromagnet, [Ni(dipn)]3[Cr(CN) 6]2·3H2O (dipn = dipropylene triamine), based on a cubic Cr8Ni12 unit

Wakako Kaneko; Masaaki Ohba; Hisashi Okawa; Susumu Kitagawa

doi:10.1021/ic0606882

A three-dimensional ferromagnet, [Ni(dipn)]₃[Cr(CN) ₆]₂·3H₂O (dipn = dipropylene triamine), based on a cubic Cr₈Ni₁₂ unit

Wakako Kaneko, Masaaki Ohba, Hisashi Okawa, Susumu Kitagawa

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

18 Citations (Scopus)

Abstract

The combination of Ni²⁺, dipropylenetriamine (dipn), and [Cr(CN)₆]^3- affords the cyanide-bridged bimetallic assembly, [Ni(dipn)]₃[Cr(CN)₆]₂·3H ₂O (1). This compound crystallizes in cubic space group Pa3, with a = b = c = 20.9742-(7) Å and Z = 8. A three-dimensional network is constructed on the basis of a Cr₈Ni₁₂ cubane unit formed by an alternate array of [Cr(CN)₆]^3- and [Ni(dipn)] ²⁺ units through Cr-CN-Ni-NC-Cr edges. Cryomagnetic studies reveal a ferromagnetic interaction between Cr^III and Ni^II ions and a long-range ferromagnetic ordering below 42 K with very small coercive field. To the best of our knowledge, this compound is the first "complete ferromagnet" providing three-dimensional ferromagnetic interaction through a three-dimensional bridging structure that is based on a cubic unit among general metal-oxide and molecule-based magnets. Magnetooptical studies demonstrate a strong correlation between magnetic and optical properties.

Original language	English
Pages (from-to)	7191-7196
Number of pages	6
Journal	Inorganic chemistry
Volume	45
Issue number	18
DOIs	https://doi.org/10.1021/ic0606882
Publication status	Published - Sept 4 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry

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title = "A three-dimensional ferromagnet, [Ni(dipn)]3[Cr(CN) 6]2·3H2O (dipn = dipropylene triamine), based on a cubic Cr8Ni12 unit",

abstract = "The combination of Ni2+, dipropylenetriamine (dipn), and [Cr(CN)6]3- affords the cyanide-bridged bimetallic assembly, [Ni(dipn)]3[Cr(CN)6]2·3H 2O (1). This compound crystallizes in cubic space group Pa3, with a = b = c = 20.9742-(7) {\AA} and Z = 8. A three-dimensional network is constructed on the basis of a Cr8Ni12 cubane unit formed by an alternate array of [Cr(CN)6]3- and [Ni(dipn)] 2+ units through Cr-CN-Ni-NC-Cr edges. Cryomagnetic studies reveal a ferromagnetic interaction between CrIII and NiII ions and a long-range ferromagnetic ordering below 42 K with very small coercive field. To the best of our knowledge, this compound is the first {"}complete ferromagnet{"} providing three-dimensional ferromagnetic interaction through a three-dimensional bridging structure that is based on a cubic unit among general metal-oxide and molecule-based magnets. Magnetooptical studies demonstrate a strong correlation between magnetic and optical properties.",

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AU - Kaneko, Wakako

AU - Ohba, Masaaki

AU - Okawa, Hisashi

AU - Kitagawa, Susumu

PY - 2006/9/4

Y1 - 2006/9/4

N2 - The combination of Ni2+, dipropylenetriamine (dipn), and [Cr(CN)6]3- affords the cyanide-bridged bimetallic assembly, [Ni(dipn)]3[Cr(CN)6]2·3H 2O (1). This compound crystallizes in cubic space group Pa3, with a = b = c = 20.9742-(7) Å and Z = 8. A three-dimensional network is constructed on the basis of a Cr8Ni12 cubane unit formed by an alternate array of [Cr(CN)6]3- and [Ni(dipn)] 2+ units through Cr-CN-Ni-NC-Cr edges. Cryomagnetic studies reveal a ferromagnetic interaction between CrIII and NiII ions and a long-range ferromagnetic ordering below 42 K with very small coercive field. To the best of our knowledge, this compound is the first "complete ferromagnet" providing three-dimensional ferromagnetic interaction through a three-dimensional bridging structure that is based on a cubic unit among general metal-oxide and molecule-based magnets. Magnetooptical studies demonstrate a strong correlation between magnetic and optical properties.

AB - The combination of Ni2+, dipropylenetriamine (dipn), and [Cr(CN)6]3- affords the cyanide-bridged bimetallic assembly, [Ni(dipn)]3[Cr(CN)6]2·3H 2O (1). This compound crystallizes in cubic space group Pa3, with a = b = c = 20.9742-(7) Å and Z = 8. A three-dimensional network is constructed on the basis of a Cr8Ni12 cubane unit formed by an alternate array of [Cr(CN)6]3- and [Ni(dipn)] 2+ units through Cr-CN-Ni-NC-Cr edges. Cryomagnetic studies reveal a ferromagnetic interaction between CrIII and NiII ions and a long-range ferromagnetic ordering below 42 K with very small coercive field. To the best of our knowledge, this compound is the first "complete ferromagnet" providing three-dimensional ferromagnetic interaction through a three-dimensional bridging structure that is based on a cubic unit among general metal-oxide and molecule-based magnets. Magnetooptical studies demonstrate a strong correlation between magnetic and optical properties.

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A three-dimensional ferromagnet, [Ni(dipn)]₃[Cr(CN) ₆]₂·3H₂O (dipn = dipropylene triamine), based on a cubic Cr₈Ni₁₂ unit

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