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	Cyanide-bridged Mn(III)-Fe(III) bimetallic complexes based on the pentacyano(1-methylimidazole)ferrate(III) building block: Structure and magnetic characterizations
	Ni, Wei-Wei ; Ni, Zhong-Hai ; Cui, Ai-Li ; Liang, Xin ; Kou, Hui-Zhong
	2010-05-06 ; 2010-05-06
关键词	SINGLE-MOLECULE-MAGNET ONE-DIMENSIONAL FERROMAGNET MANGANESE(III) SCHIFF-BASE LADDER CHAIN STRUCTURE HIGH-SPIN CRYSTAL-STRUCTURE GROUND-STATE 2-DIMENSIONAL FERRIMAGNET HETEROMETALLIC SYSTEMS ORDERING TEMPERATURE Chemistry, Inorganic & Nuclear
中文摘要	Seven cyanide-bridged bimetallic complexes have been synthesized by the reaction of [Fe(1-CH(3)im)(CN)(5)](2-) with Mn(III) Schiff base complexes. Their crystal structure and magnetic properties have been characterized. Five complexes, [Mn-2(5-Brsalen)(2)Fe(CN)(5)(1-CH(3)im)]center dot H2O (1), [Mn-2(5-Clsalen)(2)(H2O)(2)Fe(CN)(5)(1-CH(3)im)]center dot H2O (2), [Mn-2(5-Clsaltn)(2)(H2O)(2)Fe(CN)(5)(1-CH(3)im)] (3), [Mn-2(5-Clsaltmen)(2)(H2O)(2)Fe(CN)(5)(1-CH(3)im)]center dot H2O (4), and [Mn-2(5-Brsaltmen)(2)(H2O)(2)Fe(CN)(5)(1-CH(3)im)]center dot CH3OH (5), are neutral and trinuclear with two [Mn(SB)](+) (SB2- = Schiff base ligands) and one [Fe(1-CH(3)im)(CN)(5)](2-). Complex {[Et4N][Mn(acacen)Fe(CN)(5)(1-CH(3)im)]}(n)center dot 6nH(2)O (6) is one-dimensional with alternate [Mn(acacen)](+) and [Fe(CN)(5)(1-CH(3)im)](2-) units. The two-dimensional complex {[Mn-4(saltmen)(4)Fe(CN)(5)(1-CH(3)im)]}(n)[ClO4](2n)center dot 9nH(2)O (7) consists of Mn4Fe units which are further connected by the phenoxo oxygen atoms. Magnetic studies show the presence of ferromagnetic Mn(III)-Fe(III) coupling in the trinuclear compounds with the magnetic coupling constant (J) ranging from 4.5 to 6.0 cm(-1), based on the Hamiltonian (H) over cap = -2J (S) over cap (Fe)((S) over cap (Mn(1)) + (S) over cap (Mn(2))). Antiferromagnetic interaction has been observed in complex 6, whereas ferromagnetic coupling occurs in complex 7. Complexes 6 and 7 exhibit long-range magnetic ordering with a T-N value of 4.0 K for 6 and T-c of 4.8 K for 7. Complex 6 shows metamagnetic behavior at 2 K, and complex 7 possesses a hysteresis loop with a coercive field of 500 Oe, typical of a soft ferromagnet.
语种	英语 ; 英语
出版者	AMER CHEMICAL SOC ; WASHINGTON ; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/12900]
专题	清华大学
推荐引用方式 GB/T 7714	Ni, Wei-Wei,Ni, Zhong-Hai,Cui, Ai-Li,et al. Cyanide-bridged Mn(III)-Fe(III) bimetallic complexes based on the pentacyano(1-methylimidazole)ferrate(III) building block: Structure and magnetic characterizations[J],2010, 2010.
APA	Ni, Wei-Wei,Ni, Zhong-Hai,Cui, Ai-Li,Liang, Xin,&Kou, Hui-Zhong.(2010).Cyanide-bridged Mn(III)-Fe(III) bimetallic complexes based on the pentacyano(1-methylimidazole)ferrate(III) building block: Structure and magnetic characterizations..
MLA	Ni, Wei-Wei,et al."Cyanide-bridged Mn(III)-Fe(III) bimetallic complexes based on the pentacyano(1-methylimidazole)ferrate(III) building block: Structure and magnetic characterizations".(2010).

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