Lanthanide(III) (Eu,Gd, Tb,Dy) Complexes Derived from 4‐(Pyridin‐2‐yl)methyleneamino‐1,2,4‐triazole: Crystal Structure,Magnetic Properties,and Photoluminescence |
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| Authors: | Dr. Evgeniya S. Bazhina Anna A. Bovkunova Dr. Alexey V. Medved'ko Evgeniya A. Varaksina Dr. Ilya V. Taidakov Dr. Nikolay N. Efimov Prof. Dr. Mikhail A. Kiskin Prof. Dr. Igor L. Eremenko |
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| Affiliation: | 1. N. S. Kurnakov Institute of General and Inorganic Chemistry, of the Russian Academy of Sciences, Moscow, Russia;2. Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow, Russia;3. A. N. Nesmeyanov Institute of Organoelement Compounds, of the Russian Academy of Sciences, Moscow, Russia;4. P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia;5. Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, Russia |
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| Abstract: | The reaction of lanthanide(III) nitrates with 4‐(pyridin‐2‐yl)methyleneamino‐1,2,4‐triazole (L) was studied. The compounds [Ln(NO3)3(H2O)3] ? 2 L, in which Ln=Eu ( 1 ), Gd ( 2 ), Tb ( 3 ), or Dy ( 4 ), obtained in a mixture of MeCN/EtOH have the same structure, as shown by XRD. In the crystals of these compounds, the mononuclear complex units [Ln(NO3)3(H2O)3] are linked to L molecules through intermolecular hydrogen‐bonding interactions to form a 2D polymeric supramolecular architecture. An investigation into the optical characteristics of the Eu3+‐, Tb3+‐, and Dy3+‐containing compounds ( 1 , 3 , and 4 ) showed that these complexes displayed metal‐centered luminescence. According to magnetic measurements, compound 4 exhibits single‐ion magnet behavior, with ΔEeff/kB=86 K in a field of 1500 Oe. |
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| Keywords: | lanthanides luminescence magnetic properties triazoles X-ray diffraction |
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