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A New Chiral Ni 4 O 4 Distorted Cube: Synthesis, Structure, and Magneto‐Structural Correlation
Author(s) -
Sen Rupam,
Lopes Armandina M. L.,
Lin Zhi,
Brandão Paula,
Araújo Joao P.
Publication year - 2019
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.201900662
Subject(s) - chemistry , cubane , crystal structure , crystallography , magnetization , ferromagnetism , ligand (biochemistry) , magnetic susceptibility , schiff base , cube (algebra) , stereochemistry , condensed matter physics , magnetic field , physics , geometry , biochemistry , receptor , mathematics , quantum mechanics
A new chiral tetranuclear Ni 4 O 4 complex has been developed with distorted cubane‐type structure. The structure was determined by single‐crystal X‐ray diffraction. The new tetradentate Schiff‐base ligand in this compound was synthesized via the condensation of 2′‐hydroxyacetophenone and ( R )‐3‐amino‐1,2‐propanediol. Temperature dependent magnetization measurements showed a predominant ferromagnetic interaction among the four Ni centers. The best fit of the χT vs. T curve results in a solution with two exchange interaction values, J 1 =12.7 cm –1 , and J 2 =1.6 cm –1 which are appreciably correlated with the structure. Ac susceptibility data were collected between 2 and 28 K and it is found that the data display a small frequency dependence with the peaks shifting to higher temperatures with increasing frequencies.