Iron(III) carboxylate/aminoalcohol coordination clusters with propeller-shaped Fe8 cores: Approaching reasonable exchange energies
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BOTEZAT, Olga, VAN LEUSEN, Jan, KRAVTSOV, Victor, ELLERN, Arkady M., KOGERLER, Paul, BACA, Svetlana. Iron(III) carboxylate/aminoalcohol coordination clusters with propeller-shaped Fe8 cores: Approaching reasonable exchange energies. In: Dalton Transactions, 2015, vol. 44, nr. 47, pp. 20753-20762. ISSN 1477-9226. DOI: https://doi.org/10.1039/c5dt03024b
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Dalton Transactions
Volumul 44, Numărul 47 / 2015 / ISSN 1477-9226 /ISSNe 1477-9234

Iron(III) carboxylate/aminoalcohol coordination clusters with propeller-shaped Fe8 cores: Approaching reasonable exchange energies

DOI:https://doi.org/10.1039/c5dt03024b

Pag. 20753-20762

Botezat Olga1, Van Leusen Jan2, Kravtsov Victor1, Ellern Arkady M.3, Kogerler Paul2, Baca Svetlana1
 
1 Institute of Applied Physics, Academy of Sciences of Moldova,
2 Institute of Inorganic Chemistry RWTH Aachen University,
3 Iowa State University, Ames
 
 
Disponibil în IBN: 24 mai 2023


Rezumat

A series of new octanuclear propeller-like aminoalcohol-supported Fe(iii) oxocarboxylate coordination clusters, [Fe8O3(O2CCHMe2)9(tea)(teaH)3]·MeCN·2(H2O) (1), [Fe8O3(O2CCHMe2)6(N3)3(tea)(teaH)3] (2), [Fe8O3(O2CCMe3)6(N3)3(tea)(teaH)3]·0.5(EtOH) (3), and [Fe8O3(O2CCHMe2)6(N3)3(mdea)3(MeO)3] (4) (where teaH3 = triethanolamine; mdeaH2 = N-methyldiethanolamine) has been isolated and magnetochemically analyzed combining the programs wxJFinder and CONDON in an approach to avoid overparameterization issues that are common to larger spin polytopes. Dominant antiferromagnetic exchange interactions exist in all clusters along the edges of the propellers, while moderate ferromagnetic interactions are found along the propeller axes in their {Fe8O3} metallic cores. 

Cuvinte-cheie
Antiferromagnetic exchange interactions, Coordination clusters, Exchange energy, Ferro-magnetic interactions, Metallic cores, N-methyldiethanolamine, Overparameterization, Polytopes