MnIII(tetra-biphenyl-porphyrin)-TCNE Single-Chain Magnet via Suppression of the Interchain Interactions

被引：52

作者：

Ishikawa, Ryuta ^{[1
]}

Katoh, Keiichi ^{[1
]}

Breedlove, Brian K. ^{[1
]}

Yamashita, Masahiro ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Chem, Aoba Ku, Sendai, Miyagi 9808578, Japan

来源：

INORGANIC CHEMISTRY | 2012年 / 51卷 / 16期

关键词：

HIGH-FIELD EPR; MOLECULE-BASED FERRIMAGNET; ELECTRON-TRANSFER SALT; MANGANESE(III) PORPHYRINS; DIMENSIONALITY CROSSOVERS; SITE ANISOTROPY; ION-ANISOTROPY; HIGH-FREQUENCY; GROUND-STATE; 1ST EXAMPLE;

D O I：

10.1021/ic3015223

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A single-chain magnet (SCM) of [Mn(TBPP)(TCNE)]center dot 4m-PhCl2 (1), where TBPP2- = meso-tetra(4-biphenyl)porphyrinate; TCNE center dot- = tetracyanoethenide radical anion; m-PhCl2 = meta-dichlorobenzene, was prepared via suppression of interchain interactions. I has a one-dimensional alternating Mn-III(porphrin)-TCNE center dot- chain structure similar to those of a family of complexes reported by Miller and co-workers. From a comparison of the static magnetic properties of 1 with other Mn-III(porphyrin)-TCNE center dot- chains, a magneto-structural correlation between the intrachain magnetic exchange and both the dihedral angle between the mean plane on [Mn(TBPP)(TCNE)] and Mn-N equivalent to C was observed. The ac magnetic susceptibility data of 1 could be fit with the Arrhenius law, indicating that slow magnetic relaxation and ruling out three-dimensional long-range ordering and spin-glass-like behavior. The Cole-Cole plot for 1 was semicircular, verifying that it is an SCM. Therefore, 1 is an ideal single-chain magnet with significantly strong intrachain magnetic exchange interactions beyond the Ising limit.

引用

页码：9123 / 9131

页数：9

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