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	[Fe(bpb)(CN)(2)](-) as a versatile building block for the design of novel low-dimensional heterobimetallic systems: Synthesis, crystal structures, and magnetic properties of cyano-bridged F-III-Ni-II complexes [(bpb)2(-)=1,2-bis(pyridine-2 carboxamido)benzenate]
	Ni, ZH ; Kou, HZ ; Zhao, YH ; Zheng, L ; Wang, RJ ; Cui, AL ; Sato, O
	2010-05-06 ; 2010-05-06
关键词	SINGLE-MOLECULE-MAGNET SPIN-CROSSOVER SYSTEMS HETEROMETALLIC SYSTEMS COPPER(II) COMPLEXES ORDERING TEMPERATURE PENTANUCLEAR COMPLEX CHAIN MAGNET DEGREES-C CLUSTER FERRIMAGNET Chemistry, Inorganic & Nuclear
中文摘要	A dicyano-containing [Fe(bpb)(CN)(2)](-) building block has been employed for the synthesis of cyano-bridged heterometallic Ni-II-Fe-III complexes. The presence of steric bpb(2-) ligand around the iron ion results in the formation of low-dimensional species: five are neutral NiFe2 trimers and three are one-dimensional (1D). The structure of the 1D complexes consists of alternating [NiL](2+) and [Fe(bpb)(CN)(2)]- generating a cyano-bridged cationic polymeric chain and the perchlorate as the counteranion. In all complexes, the coordination geometry of the nickel ions is approximately octahedral with the cyano nitrogen atoms at the trans positions. Magnetic studies of seven complexes show the presence of ferromagnetic interaction between the metal ions through the cyano bridges. Variable temperature magnetic susceptibility investigations of the trimeric complexes yield the following J(NiFe) values (based on the spin exchange Hamiltonian H = -2J(NiFe) S-Ni(S-Fe(1) + S-Fe(2)): J(NiFe) = 6.40(5), 7.8(1), 8.9(2), and 6.03(4) cm(-1), respectively. The study of the magneto-structural correlation reveals that the cyanide-bridging bond angle is related to the strength of magnetic exchange coupling: the larger the Ni-N=C bond angle, the stronger the Ni---Fe magnetic interaction. One 1D complex exhibits long-range antiferromagnetic ordering with T-N = 3.5 K. Below TN (1.82 K), a metamagnetic behavior was observed with the critical field of similar to 6 kOe. The present research shows that the [Fe(bpb)(CN)2](-) building block is a good candidate for the construction of low-dimensional magnetic materials.
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/123456789/13514]
专题	清华大学
推荐引用方式 GB/T 7714	Ni, ZH,Kou, HZ,Zhao, YH,et al. [Fe(bpb)(CN)(2)](-) as a versatile building block for the design of novel low-dimensional heterobimetallic systems: Synthesis, crystal structures, and magnetic properties of cyano-bridged F-III-Ni-II complexes [(bpb)2(-)=1,2-bis(pyridine-2 carboxamido)benzenate][J],2010, 2010.
APA	Ni, ZH.,Kou, HZ.,Zhao, YH.,Zheng, L.,Wang, RJ.,...&Sato, O.(2010).[Fe(bpb)(CN)(2)](-) as a versatile building block for the design of novel low-dimensional heterobimetallic systems: Synthesis, crystal structures, and magnetic properties of cyano-bridged F-III-Ni-II complexes [(bpb)2(-)=1,2-bis(pyridine-2 carboxamido)benzenate]..
MLA	Ni, ZH,et al."[Fe(bpb)(CN)(2)](-) as a versatile building block for the design of novel low-dimensional heterobimetallic systems: Synthesis, crystal structures, and magnetic properties of cyano-bridged F-III-Ni-II complexes [(bpb)2(-)=1,2-bis(pyridine-2 carboxamido)benzenate]".(2010).

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