2D and 3D bimetallic oxalate-based ferromagnets prepared by insertion of different FeIII spin crossover complexes

被引：46
作者：
Clemente-Leon, Miguel [1 ]
Coronado, Eugenio [1 ]
Lopez-Jorda, Maurici [1 ]
机构：
[1] Univ Valencia, Inst Ciencia Mol, Valencia 46980, Spain
来源：
DALTON TRANSACTIONS | 2010年 / 39卷 / 20期
关键词：
MOLECULE-BASED MAGNETS; VERSATILE BUILDING-BLOCK; CRYSTAL-STRUCTURES; MN-II; HETEROPOLYMETALLIC SYSTEMS; POLYMERIC NETWORK; CHIRAL DICHROISM; BRIDGED NETWORKS; MIXED-VALENCY; X-RAY;
D O I：
10.1039/c001067g
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The syntheses, structures and magnetic properties of the compounds of formula [Fe-III(5-NO(2)sal(2)-trien)][(MnCrIII)-Cr-II(ox)(3)]center dot CH3NO2 center dot 0.5H(2)O (1) and [Fe-III(5-CH(3)Osal(2)-trien)][(MnCrIII)-Cr-II(ox)(3)] (2) are reported. The structure of 1, that crystallizes in the P2(1) chiral space group, presents a 2D honeycomb anionic layer formed by Mn-II and Cr-III ions linked through oxalate ligands and a cationic layer of [Fe-III(5-NO(2)sal(2)-trien)](+) complexes intercalated between the 2D oxalate network. The structure of 2, that crystallizes in the Pna2(1) acentric space group, presents a 3D achiral anionic network formed by Mn-II and Cr-III ions linked through oxalate ligands with [Fe(5-CH(3)Osal(2)-trien)](+) complexes intercalated within the 3D oxalate network. The magnetic properties of 1 and 2 indicate that both compounds undergo a long-range ferromagnetic ordering at ca. 5 K. On the other hand, the inserted Fe-III cations remain mainly in the low-spin (LS) state in the case of 1 and in the high-spin (HS) state in the case of 2.
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页码：4903 / 4910
页数：8
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