Three angular Zn2Dy complexes showing the effect of remote coordination at Zn and counter ions on slow magnetic relaxation at Dy centres

Panja, Anangamohan (author), Jagličić, Zvonko (author), Herchel, Radovan (author), Brandão, Paula (author), Pramanik, Kuheli (author), Jana, Narayan Ch. (author)

Three new angular trinuclear Zn2Dy complexes, [Dy{Zn(L)Cl}2(H2O)2]Cl3H2O (1), [Dy{Zn(L)Br}2(H2O)2](NO3) 6H2O (2) and [Dy{Zn(L)I}2(H2O)2](NO3)6H2O (3), derived from a methyl substituted o-vanillin based Schiff base ligand, N,N0 -bis(3-methoxy-5-methylsalicylidene)-1,2-phenylenediamine (H2L), have been synthesized and magneto-structurally characterised. In the complex cations in 1–3, the coordination environments of the Dy(III) ions are identical, but the apical coordination to the Zn(II) ion is different as it is bonded to different halide ions. Magnetic studies reveal that both 2 and 3 display field-supported slow magnetic relaxation, consistent with the isomorphic nature of the compounds, while 1 exhibits more pronounced singlemolecule magnetic behaviour. The direct fitting of the experimental data as well as the analysis with CASSCF calculations and SINGLE_ANISO module reveals a variation in magnetic anisotropy within the series and the presence of weak antiferromagnetic intermolecular interactions. Therefore, the present report highlights the influence of remote coordination at Zn and counter ions on magnetic anisotropy and on intermolecular antiferromagnetic dipolar interactions, leading to distinct magnetic dynamics in these systems.

• Language: English
• Keywords: molekularni magnetizem, Zn2Dy complexes
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering; FMF - Faculty of Mathematics and Physics
• Publication date: 01.01.2022
• Year: 2022
• Number of pages: Str. 13546-13557
• Numbering: Vol. 46, iss. 28, art. 13546
• PID: 20.500.12556/RUL-146426
• UDC: 544
• ISSN on article: 1369-9261
• DOI: 10.1039/d2nj01759h
• COBISS.SI-ID: 143373315
• Publication date in RUL: 31.05.2023

Record is a part of a journal

• Title: New journal of chemistry
• Shortened title: New j. chem.
• Publisher: Royal Society of Chemistry
• ISSN: 1369-9261
• COBISS.SI-ID: 22573573

Secondary language

• Language: Slovenian
• Keywords: molekularni magnetizem, kompleks Zn2Dy

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0348
• Name: Nove slikovno-analitske metode