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1D Chains Constructed from Oxido‐Centered [Mn 3 O] Units Exhibiting Single‐Chain Magnet Behavior
Author(s) -
Song Xueyan,
Yang PeiPei,
Mei Xuelan,
Li Licun,
Liao Daizheng
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200901244
Subject(s) - chemistry , crystallography , antiferromagnetism , formate , magnetic susceptibility , azide , ion , ferromagnetism , magnet , chain (unit) , magnetic relaxation , single molecule magnet , center (category theory) , crystal structure , magnetization , metal , stereochemistry , condensed matter physics , magnetic field , physics , organic chemistry , quantum mechanics , astronomy , catalysis , biochemistry
The synthesis, crystal structure, and magnetic properties of two new Mn III single‐chain magnets, [Mn 3 O(L) 3 (HCOO)(CH 3 OH) 4 ] · 2CH 3 OH ( 1 ) and [Mn 3 O(L) 3 N 3 (C 2 H 5 OH) 3 (H 2 O)] ( 2 ) (H 2 L = 3‐ tert ‐butyl‐5‐methylsalicylaldoxime) are reported. Complexes 1 and 2 consist of a triangle of Mn III ions with an oxido‐center bridge and three 3‐ tert ‐butyl‐5‐methylsalicylaldoxime ligands that form a plane with the metal ions. Both complexes contain the same cores with the general formula [Mn 3 ( μ 3 ‐O)(L) 3 ] + , which are further connected by formate (complex 1 ) or azide (complex 2 ) ligands into chain structures. Temperature‐dependent magnetic susceptibility studies indicate the presence of antiferromagnetic interactions between the Mn III ions in 1 , whereas predominantly ferromagnetic interactions are observed in 2 . Both complexes show slow relaxation of their magnetizations associated with single‐chain magnet behavior.