The results. Sample Availability: Samples in the compounds are usually not obtainable in the authors.
moleculesArticleA Series of Novel Pentagonal-Bipyramidal Erbium(III) Complexes with Acyclic Chelating N3O2 Schiff-Base Ligands: Synthesis, Structure, and MagnetismTamara A. Bazhenova 1 , Vyacheslav A. Kopotkov 1, , Denis V. Korchagin 1 , Yuriy V. Manakin 1 , Leokadiya V. Zorina 1,two , Sergey V. Simonov 1,two , Ilya A. Yakushev 1,three , Vladimir S. Mironov 1,4 , Alexander N. Vasiliev five,six , Olga V. Maximova 6 and Eduard B. Yagubskii2 3Citation: Bazhenova, T.A.; Kopotkov, V.A.; Korchagin, D.V.; Manakin, Y.V.; Zorina, L.V.; Simonov, S.V.; Yakushev, I.A.; Mironov, V.S.; Vasiliev, A.N.; Maximova, O.V.; et al. A Series of Novel Pentagonal-Bipyramidal Erbium(III) Complexes with Acyclic Chelating N3 O2 Schiff-Base Ligands: Synthesis, Structure, and Magnetism. Molecules 2021, 26, 6908. https:// doi.org/10.3390/molecules26226908 Academic Editor: Jozef Stre ka c Received: 17 October 2021 MNITMT web Accepted: 13 November 2021 Published: 16 NovemberInstitute of Nitrocefin supplier Complications of Chemical Physics, IPCP RAS, Chernogolovka 142432, Russia; [email protected] (T.A.B.); [email protected] (D.V.K.); [email protected] (Y.V.M.); [email protected] (L.V.Z.); [email protected] (S.V.S.); [email protected] (I.A.Y.); [email protected] (V.S.M.); [email protected] (E.B.Y.) Institute of Solid State Physics, ISSP RAS, Chernogolovka 142432, Russia Kurnakov Institute of Common and Inorganic Chemistry, IGIC RAS, Moscow 119333, Russia Shubnikov Institute of Crystallography of Federal Scientific Investigation Centre “Crystallography and Photonics” RAS, Moscow 119333, Russia Laboratory of Quantum Functional Components, National University of Science and Technologies “MISiS”, Moscow 119049, Russia; [email protected] Lomonosov Moscow State University, Moscow 119991, Russia; [email protected] Correspondence: [email protected]: A series of six seven-coordinate pentagonal-bipyramidal (PBP) erbium complexes, with acyclic pentadentate [N3 O2 ] Schiff-base ligands, 2,6-diacetylpyridine bis-(4-methoxy benzoylhydrazone) [H2 DAPMBH], or two,6-diacethylpyridine bis(salicylhydrazone) [H4 DAPS], and different apical ligands in different charge states were synthesized: [Er(DAPMBH)(C2 H5 OH)Cl] (1); [Er(DAPMBH) (H2 O)Cl]C2 H5 OH (two); [Er(DAPMBH)(CH3 OH)Cl] (three); [Er(DAPMBH)(CH3 OH)(N3 )] (4); [(Et3 H)N] [Er (H2 DAPS)Cl2 ]- (5); and [(Et3 H)N] [Y0 .95 Er0 .05 (H2 DAPS)Cl2 ]- (6). The physicochemical properties, crystal structures, along with the DC and AC magnetic properties of 1 have been studied. The AC magnetic measurements revealed that the majority of Compounds 1 are field-induced single-molecule magnets, with estimated magnetization power barriers, Ueff 168 K. The experimental study with the magnetic properties was complemented by theoretical analysis depending on ab initio and crystal field calculations. An experimental and theoretical study with the magnetism of 1 shows the subtle impact on the sort and charge state of your axial ligands around the SMM properties of those complexes. Keywords and phrases: field-induced single-molecular magnets; seven-coordinate complexes; Er(III) complexes; ligands H2 DAPMBH and H4 DAPS; crystal structure; DC and AC magnetic propertiesPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.1. Introduction Currently, it has turn into obvious that magnetic anisotropy is the most important element for the improvement of high-performance single-molecule magnets (SMMs) [1]. An e.