Lanthanide complexes containing pentadentate s-triazine-based Schiff base ligand: Synthesis, structure and magnetic features

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F25%3A73630720" target="_blank" >RIV/61989592:15640/25:73630720 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0020169325001562?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0020169325001562?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ica.2025.122690" target="_blank" >10.1016/j.ica.2025.122690</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Lanthanide complexes containing pentadentate s-triazine-based Schiff base ligand: Synthesis, structure and magnetic features

Popis výsledku v původním jazyce

Five mononuclear Ln(III) complexes {Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)} of the general composition [Ln(L)(NO3)(H2O)]&amp; sdot;solv (solv = H2O and/or DMF) were synthesized and thoroughly characterized. The pentadentate H2L Schiff base ligand, formed by condensation of 2,4-bishydrazino-6-amino-s-triazine with 3-ethoxysalicylaldehyde, is coordinated to the Ln(III) atoms in the N3O2 donor set in an equatorial plane. The coordination geometry of the central metal atoms is then completed by a bidentate-bonded nitrato ligand and one water molecule, thus forming a biaugmented trigonal prism environment, as follows from the X-ray structure of complex 1. A detailed magnetic evaluation (static (dc) and dynamic (ac) data) of complexes 1-5 uncovered that they behave as magnetically diluted paramagnetics with weak antiferromagnetic features originating probably in the presence of non-covalent bonding in the solid samples. Only the complexes of Dy (3) and Er (5) showed signs of slow relaxation of magnetization with the estimated energy barrier values of Ueff = 9.4 (5) K (for 3) and Ueff = 9.9 (6) K (for 5), and relaxation times of tau 0 = 0.25 (8) mu s (for 3) and tau 0 = 0.45(9) mu s (for 5).

Název v anglickém jazyce

Lanthanide complexes containing pentadentate s-triazine-based Schiff base ligand: Synthesis, structure and magnetic features

Popis výsledku anglicky

Five mononuclear Ln(III) complexes {Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)} of the general composition [Ln(L)(NO3)(H2O)]&amp; sdot;solv (solv = H2O and/or DMF) were synthesized and thoroughly characterized. The pentadentate H2L Schiff base ligand, formed by condensation of 2,4-bishydrazino-6-amino-s-triazine with 3-ethoxysalicylaldehyde, is coordinated to the Ln(III) atoms in the N3O2 donor set in an equatorial plane. The coordination geometry of the central metal atoms is then completed by a bidentate-bonded nitrato ligand and one water molecule, thus forming a biaugmented trigonal prism environment, as follows from the X-ray structure of complex 1. A detailed magnetic evaluation (static (dc) and dynamic (ac) data) of complexes 1-5 uncovered that they behave as magnetically diluted paramagnetics with weak antiferromagnetic features originating probably in the presence of non-covalent bonding in the solid samples. Only the complexes of Dy (3) and Er (5) showed signs of slow relaxation of magnetization with the estimated energy barrier values of Ueff = 9.4 (5) K (for 3) and Ueff = 9.9 (6) K (for 5), and relaxation times of tau 0 = 0.25 (8) mu s (for 3) and tau 0 = 0.45(9) mu s (for 5).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INORGANICA CHIMICA ACTA

ISSN

0020-1693

e-ISSN

1873-3255

Svazek periodika

583

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

nestránkováno

Kód UT WoS článku

001466973700001

EID výsledku v databázi Scopus

2-s2.0-105002112832