Coexistence of Long-Range Ferromagnetic Ordering and Glassy Behavior in One-Dimensional Bimetallic Cyano-Bridged Polymers
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- 作者：Dongfeng Li ; Limin Zheng ; Yuanzhu Zhang ; Jin Huang ; Song Gao ; and Wenxia Tang
- 刊名：Inorganic Chemistry
- 出版年：2003
- 出版时间：September 22, 2003
- 年：2003
- 卷：42
- 期：19
- 页码：6123 - 6129
- 全文大小：210K
- 年卷期：v.42,no.19(September 22, 2003)
- ISSN：1520-510X
文摘
Two new one-dimensional (1-D) 3d-5d cyano-bridged bimetallic assemblies, {[Co3II(DMF)12][WV(CN)8]2]}
(1) and{[Mn3II(bipy)2(DMF)8][WV(CN)8]2} (2), have been synthesized and characterized, where bipy stands for 2,2'-bipyridineand DMF represents N,N-dimethylformamide. The X-ray analyses show that the two complexes belong to the P
space group with Z = 1 and C52H84N28O12Co3W2, a = 11.690(3) Å, b = 12.703(3) Å, c = 13.712(3) Å, 
=86.889(4)
, 
= 73.256(4), and 
= 77.033(4) for 1 and C60H72N28O8Mn3W2, a = 10.672(2) Å, b = 13.024(3)Å, c = 16.000(3) Å, = 78.32(3), = 75.69(3), and = 66.63(3) for 2. The structures of the two complexesare similar and consist of 12-atom rhombic M2W2(CN)4 (M = Co (1), Mn (2)) units, which act as a basic componentto be repeatedly connected through W-C-N-M-N-C-W linkages to form a one-dimensional infinite 3,2-chain;these chains are well separated by the DMF molecules or 2,2'-bipyridines coordinated to the metal ions Co2+ for1 and Mn2+ for 2. Magnetic studies, including linear and nonlinear ac susceptibility measurements, demonstratethat the long-range magnetic ordering and spin glass behavior coexist in the two 1-D compounds.
(1) and{[Mn3II(bipy)2(DMF)8][WV(CN)8]2} (2), have been synthesized and characterized, where bipy stands for 2,2'-bipyridineand DMF represents N,N-dimethylformamide. The X-ray analyses show that the two complexes belong to the Pspace group with Z = 1 and C52H84N28O12Co3W2, a = 11.690(3) Å, b = 12.703(3) Å, c = 13.712(3) Å, =86.889(4), = 73.256(4), and = 77.033(4) for 1 and C60H72N28O8Mn3W2, a = 10.672(2) Å, b = 13.024(3)Å, c = 16.000(3) Å, = 78.32(3), = 75.69(3), and = 66.63(3) for 2. The structures of the two complexesare similar and consist of 12-atom rhombic M2W2(CN)4 (M = Co (1), Mn (2)) units, which act as a basic componentto be repeatedly connected through W-C-N-M-N-C-W linkages to form a one-dimensional infinite 3,2-chain;these chains are well separated by the DMF molecules or 2,2'-bipyridines coordinated to the metal ions Co2+ for1 and Mn2+ for 2. Magnetic studies, including linear and nonlinear ac susceptibility measurements, demonstratethat the long-range magnetic ordering and spin glass behavior coexist in the two 1-D compounds.