| Publication Type |
Journal Article |
| Title |
Butterfly-like Heteronuclear 3d-4f Metal Clusters: Synthesis, Structures, Magnetic Properties, and Magnetocaloric Effect |
| Authors |
Muhammad Nadeem Akhtar Murad A. AlDamen Magdalena Fitta M. Shahid A Kirillov |
| Groups |
BioMol |
| Journal |
CRYSTAL GROWTH \& DESIGN |
| Year |
2022 |
| Month |
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|
| Volume |
22 |
| Number |
1 |
| Pages |
608-614 |
| Abstract |
This study describes the self-assembled synthesis, characterization, and structural features of two new heterometallic Fe(6)Ln clusters, [Fe(6)Ln(mu(3)-OH)(2)(mdea)(6)(N-3)(6)(NO3)] (Ln = Y (1), Gd (2); mdeaH(2) = N-methyldiethanolamine). The obtained compounds possess a unique crystalline structure with a vertex-sharing butterfly-like Fe(3)LnFe(3) motif and a rare type of 2,3,4M7-1 topology. The compounds show a new prototype structure with a distinctive arrangement of a lanthanide center between the Fe-3 triangles. Magnetic properties of the obtained clusters were investigated in detail. In 1, the best fit through a spin Hamiltonian to the experimental data of both magnetic susceptibility and magnetization curves gave J values ranging from -5.5 to -11.1 cm(-1). In 2, these values vary from -18.0 to -31.5 cm(-1). The cluster 2 also showed a magnetocaloric effect (MCE) with a -Delta S-m value of 10.6 J kg(-1) K-1 (16.3 J mol(-1) K-1) at 2.0 K. This effect is superior to that of other metallacrown compounds (with one Gd inside of an antiferromagnetic matrix of iron centers). The obtained compounds bring a new example of heptametallic clusters into a family of heteronuclear iron(III)-lanthanide derivatives with notable structural characteristics and magnetic behavior. |
| DOI |
http://dx.doi.org/10.1021/acs.cgd.1c01149 |
| ISBN |
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| Publisher |
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| Book Title |
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| ISSN |
1528-7483 |
| EISSN |
1528-7505 |
| Conference Name |
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| Bibtex ID |
WOS:000741654800001 |
| Observations |
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