Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-6904
Authors: | Calancea, Sergiu Carrella, Luca Mocanu, Teodora Sadohin, Vladimir Raduca, Mihai Gutu, Iacob Rocha, Julio da Vaz, Maria G. F. Rentschler, Eva Andruh, Marius |
Title: | Magnetic molecular rectangles constructed from functionalized nitronyl-nitroxide ligands and lanthanide(III) ions |
Online publication date: | 26-Apr-2022 |
Year of first publication: | 2021 |
Language: | english |
Abstract: | Five binuclear complexes with rectangular topology have been synthesized using a nitronyl-nitroxide ligand (L) functionalized with a pyrazole coordinating group: [Ln2(hfac)2L2], with Ln=Eu (1), Gd (2 a, 2 b), Tb (3), Dy (4), Tm (5). The EuIII and TmIII complexes crystallize in the P21/n space group, while the GdIII, TbIII, and DyIII derivatives crystalize in P-1 space group. The crystal structures for compounds 2 a, 3, 4, and 5 have been fully solved, while for compounds 1 and 2 b, the unit cell parameters have been measured and compared with crystals 3 and 5. Crystals 2 a (P21/n) and 2 b (P-1) are polymorphic forms. In these complexes the nitronyl-nitroxide ligand bridges two metal ions through one aminoxyl group and the pyrazole fragment. In the five complexes the LnIII ions show a coordination number of eight with a triangular dodecahedron geometry. The magnetic properties of all five complexes have been investigated. For compounds 2, 3, and 4 the LnIII-Rad interaction was found to be ferromagnetic: JGdRad=2.09(1) cm−1 [H=-2JGdRad(SGd1SRad1+SGd2SRad2], JTbRad=1.93(14) cm−1, JDyRad=1.72(14) cm−1. The TmIII-Rad coupling is antiferromagnetic (JTmRad=−0.53(1) cm−1). For the TbIII, DyIII, and TmIII complexes the effects of the crystal field have been taken into account in the fitting procedure. |
DDC: | 540 Chemie 540 Chemistry and allied sciences |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 09 Chemie, Pharmazie u. Geowissensch. |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-6904 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
License: | CC BY-NC-ND |
Information on rights of use: | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
Journal: | European journal of inorganic chemistry 2021 6 |
Pages or article number: | 567 577 |
Publisher: | Wiley-VCH |
Publisher place: | Weinheim |
Issue date: | 2021 |
ISSN: | 1099-0682 |
Publisher DOI: | 10.1002/ejic.202000954 |
Appears in collections: | JGU-Publikationen |
Files in This Item:
File | Description | Size | Format | ||
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magnetic_molecular_rectangles-20220426112715955.pdf | 2.58 MB | Adobe PDF | View/Open |