Topological ferrimagnetic behavior of two new [Mn(L)2(N3)2]n chains with the new AF/AF/F alternating sequence (L=3-methylpyridine or 3,4-dimethylpyridine)

被引:146
作者
Abu-Youssef, MAM
Drillon, M
Escuer, A
Goher, MAS
Mautner, FA
Vicente, R
机构
[1] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain
[2] Univ Alexandria, Fac Sci, Dept Chem, Alexandria 21321, Egypt
[3] CNRS, Inst Physicochim Mat, UMR 75040, F-67037 Strasbourg, France
[4] Graz Tech Univ, Inst Phys & Theoret Chem, A-8010 Graz, Austria
关键词
D O I
10.1021/ic000516j
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reaction of manganese(II) and pyridine derivatives such as 3-methylpyridine (S-Mepy) and 3,4-dimethylpyridine (3,3-Dmepy) led to the new one-dimensional systems trans-[Mn(3-Mepy)(2)(N-3)(2)](n) (1) and trans-[Mn(3,4-Dmepy)(2)(N-3)(2)](n) (2). Compound 1 crystallizes in the monoclinic system, space group P2(1)/n, a = 11.201(3) Angstrom, b = 14.499(4) Angstrom, c = 14.308(4) Angstrom, Z = 6, and compound 2 crystallizes in the triclinic system, space group P (1) over bar, a = 11.502(4) Angstrom, b = 14.246(5) Angstrom, c = 16.200(8) Angstrom, Z = 6. The two compounds show the same general one-dimensional arrangement of double azido bridges between neighboring manganese atoms with the unprecedented -Mn-(mu (1,3)-N-3)(2)-Mn-(mu (1,3)-N-3)(2)-Mn-(mu (1,1)-N-3)(2)-Mn- sequence. Susceptibility and magnetization measurements reveal a ferrimagnetic-like behavior derived from the topology of the chain. A model of the Heisenberg chain, comprising classical spins coupled through alternating exchange interactions J(1)J(1)J(2)... is proposed to describe the magnetic behavior.
引用
收藏
页码:5022 / 5027
页数:6
相关论文
共 28 条
[1]  
Abu Youssef M, 2000, J CHEM SOC DALTON, P413
[2]  
Abu-Youssef M. A. M., 2000, ANGEW CHEM, V112, P1681
[3]  
Abu-Youssef MAM, 2000, ANGEW CHEM INT EDIT, V39, P1624, DOI 10.1002/(SICI)1521-3773(20000502)39:9<1624::AID-ANIE1624>3.0.CO
[4]  
2-7
[5]   Synthesis, structural characterization, magnetic behavior, and single crystal EPR spectra of three new one-dimensional manganese azido systems with FM, alternating FM-AF, and AF coupling [J].
Abu-Youssef, MAM ;
Escuer, A ;
Gatteschi, D ;
Goher, MAS ;
Mautner, FA ;
Vicente, R .
INORGANIC CHEMISTRY, 1999, 38 (25) :5716-5723
[6]  
Abu-Youssef MAM, 1999, EUR J INORG CHEM, P687
[7]  
BENCINI A, 1990, EPR EXCHANGE COUPLED, pCH10
[8]  
BONNER JC, 1964, PHYS REV A, V135, P640
[9]   Alternating ferromagnetic-antiferromagnetic interactions in a manganese(II)-azido one-dimensional compound: [Mn(bipy)(N-3)(2)] [J].
Cortes, R ;
Drillon, M ;
Solans, X ;
Lezama, L ;
Rojo, T .
INORGANIC CHEMISTRY, 1997, 36 (04) :677-683
[10]   Co-ordination complexes as organic-inorganic layer magnets [J].
Day, P .
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1997, (05) :701-705