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Influence of bridging and chelating co-ligands on the distinct single-molecule magnetic behaviours in ZnDy complexes
ID
Panja, Anangamohan
(
Author
),
ID
Jagličić, Zvonko
(
Author
),
ID
Herchel, Radovan
(
Author
),
ID
Brandão, Paula
(
Author
),
ID
Jana, Narayan Ch.
(
Author
)
URL - Source URL, Visit
https://pubs.rsc.org/en/content/articlelanding/2022/NJ/D2NJ03793A
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Abstract
Four new heterometallic ZnDy complexes, [ZnDy(L)(NO3)3(py)]CH2Cl2 (1) (py stands for pyridine), [ZnDy(L)(m-OAc)(OAc)2]3H2O (2), [ZnDy(L)(m-OAc)(OAc)(NO3)] (3), and [ZnDy(L)(m-piv)(piv)2][ZnDy(L) (m-piv)(piv)(OAc)]1.5H2O (4), have been synthesized from a methyl substituted o-vanillin based compartmental Schiff base ligand, N,N0 -bis(3-methoxy-5-methylsalicylidene)-1,2-phenylenediamine (H2L), in association with various secondary co-ligands like acetate (OAc), nitrate and pivalate (piv), and magneto-structurally characterised. They possess a nearly identical [Zn(II)–Dy(III)] core, bridged by the phenoxo-O atoms of the compartmental Schiff base ligand. Magnetic studies revealed the distinct singlemolecule magnetic (SMM) behaviours through single to multiple relaxation channels, in which 1, 2 and 4 can display slow relaxation of magnetisation at a zero dc field, the performance of which can be further improved by applying a magnetic field at the expense of the reduction of under barrier relaxation processes, while 3 shows only field-induced weaker slow magnetic relaxation behaviours. Ab initio calculations were performed for the in-depth understanding of the magnetic dynamics in these complexes. The difference in the magnetic behaviours of the four complexes can be ascribed to the effect of bridging/chelating co-ligands in these complexes. Therefore, the present report highlights that the magnetic anisotropy is sensitive to the bridging/chelating co-ligands used, leading to the distinct magnetic dynamics in these systems.
Language:
English
Keywords:
molecular magnetism
,
magnetic relaxation
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
FGG - Faculty of Civil and Geodetic Engineering
FMF - Faculty of Mathematics and Physics
Year:
2022
Number of pages:
Str. 18751-18763
Numbering:
Vol. 46, iss. 39, art. 18751
PID:
20.500.12556/RUL-146430
UDC:
544.2
ISSN on article:
1369-9261
DOI:
10.1039/d2nj03793a
COBISS.SI-ID:
137343491
Publication date in RUL:
31.05.2023
Views:
369
Downloads:
20
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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
,
relaksacija magnetizacije
Projects
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0348
Name:
Nove slikovno-analitske metode
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