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Synthesis, structures and magnetic properties of chiral 3d–3d′–4f heterotrimetallic complexes based on [(Tp*)Fe(CN)3]

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Abstract

A series of 3d–3d′–4f heterotrimetallic compounds originating from (n-Bu4N)[(Tp*)Fe(CN)3] (Bu4N+ = tetrabutylammonium cation, Tp* = hydridotris(3,5-dimethylpyrazol-1-yl) borate) and [Cu((R,R)- or (S,S)-3-MeO-salcy)Ln(NO3)3(H2O)] (salcy = N,N′-(1,2-cyclohexanediylethylene)bis(salicylideneiminato) dianion), namely [(Tp*)Fe(CN)3Cu((R,R)- or (S,S)-3-MeO-salcy)Ln(NO3)3(H2O)3][(Tp*)Fe(CN)3]·2MeOH·5H2O (Ln = Gd for 1-RR and 1-SS, Tb for 2-RR and 2-SS, and Dy for 3-RR and 3-SS), were synthesized. Structural analyses demonstrate that all complexes are made up of a cyanide- and phenolate-bridged heterotrimetallic entity with [(Tp*)Fe(CN)3Cu((R,R)- or (S,S)-3-MeO-salcy)Ln(NO3)3(H2O)3] as cation and another [(Tp*)Fe(CN)3] unit as anion. Circular dichroism spectra confirm the enantiomeric nature of the optically active complexes. Magnetic studies show that overall ferromagnetic couplings are operative in all complexes. Ac susceptibility measurements under a 1000 Oe dc field demonstrate the Dy and Tb derivatives exhibit frequency-dependent χ′′ signals below 4 K.

Graphical abstract: Synthesis, structures and magnetic properties of chiral 3d–3d′–4f heterotrimetallic complexes based on [(Tp*)Fe(CN)3]−

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Publication details

The article was received on 27 Apr 2017, accepted on 26 May 2017 and first published on 26 May 2017


Article type: Paper
DOI: 10.1039/C7NJ01413A
Citation: New J. Chem., 2017, Advance Article
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    Synthesis, structures and magnetic properties of chiral 3d–3d′–4f heterotrimetallic complexes based on [(Tp*)Fe(CN)3]

    X. Deng, L. Cai, Z. Zhu, F. Gao, Y. Zhou and M. Yao, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ01413A

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