Ligand sphere-enhanced magnetic anisotropy in cobalt(II) and manganese(II) 2,6-bis-(benzimidazol-2′-yl)-pyridine dichloride

被引：20

作者：

Boca, R ^{[1
]}

Dlhán, L

Linert, W

Ehrenberg, H

Fuess, H

Haase, W

机构：

[1] Slovak Univ Technol Bratislava, Dept Inorgan Chem, SK-81237 Bratislava, Slovakia

[2] Vienna Univ Technol, Inst Inorgan Chem, Vienna, Austria

[3] Tech Univ Darmstadt, Dept Mat Sci, D-64289 Darmstadt, Germany

[4] Tech Univ Darmstadt, Inst Phys Chem, D-64289 Darmstadt, Germany

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 307卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(99)00519-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Temperature variation of the effective magnetic moment for a pentacoordinate [Co(bzimpy)Cl-2] complex shows a pronounced deviation from linearity below 120 K. Quantitative analysis based on the diagonalisation of the spin Hamiltonian matrices gave the set of magnetic parameters: g(x) = 2.501, g(y) = 2.622, g(z) = 1.476, D/hc = 71.7 cm(-1), E/hc = 1.4 cm(-1), alpha(TIP) = 0.98 x 10(-9) m(3) mol(-1) and zJ/hc = -0.184 cm(-1) (SQUID data). The extreme Value of the axial zero-field splitting parameter D shows that the magnetic anisotropy determined by the non-spherical distribution of the spin density is enhanced by the low symmetry of the pentacoordinate chromophore. For the [Mn(bzimpy)Cl-2] . 1/2 MeOH analogue, only a moderate ZFS is found (D/hc = -2.7 cm(-1)). (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：359 / 366

页数：8

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