Cerium-Based Metal-Organic Frameworks: Unveiling the Role of Terahertz Vibrations in the Spin Relaxation Dynamics
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F25%3A73633965" target="_blank" >RIV/61989592:15310/25:73633965 - isvavai.cz</a>
Výsledek na webu
<a href="https://pubs.acs.org/doi/10.1021/acs.inorgchem.4c04542" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.inorgchem.4c04542</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.inorgchem.4c04542" target="_blank" >10.1021/acs.inorgchem.4c04542</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Cerium-Based Metal-Organic Frameworks: Unveiling the Role of Terahertz Vibrations in the Spin Relaxation Dynamics
Popis výsledku v původním jazyce
The reaction between two equivalents of the Schiff base ligands N,N '-bis(3-methoxysalicylidene)ethylenediamine (H2L1) or enantiopure N,N '-bis(3-methoxysalicylidene)cyclohexane-1,2-diamine (H2L2) with one equivalent of Ce(NO3)3<middle dot>6H2O in the presence of a bulky counteranion leads to the formation of chiral metal-organic frameworks (MOFs) whose channels encapsulate the counteranion, leading to the formation of compounds with the structural formulas {[Ce(NO3)2(L1)2]X<middle dot>H2O} n , where X = ClO4 - (1), PF6 - (2), or BF4 - (3), and {[Ce(NO3)2(L2)2]X<middle dot>CH3CN} n , where X = ClO4 - (4), PF6 - (5), or BF4 - (6), as well as the isostructural reference compound {Nd(NO3)2(L1)2]BF4<middle dot>CH3CN} n (3Nd). A combination of static and dynamic magnetic measurements demonstrates the good isolation of the CeIII centers and a field-induced slow relaxation of the magnetization. Correlations between the temperature and field-dependent magnetic relaxation data and ultralow-frequency Raman spectroscopy reveal the presence of a vibronic barrier driving magnetic relaxation. Theoretical calculations have been performed to elucidate the nonparticipation of the electronic excited states in the main relaxation processes.
Název v anglickém jazyce
Cerium-Based Metal-Organic Frameworks: Unveiling the Role of Terahertz Vibrations in the Spin Relaxation Dynamics
Popis výsledku anglicky
The reaction between two equivalents of the Schiff base ligands N,N '-bis(3-methoxysalicylidene)ethylenediamine (H2L1) or enantiopure N,N '-bis(3-methoxysalicylidene)cyclohexane-1,2-diamine (H2L2) with one equivalent of Ce(NO3)3<middle dot>6H2O in the presence of a bulky counteranion leads to the formation of chiral metal-organic frameworks (MOFs) whose channels encapsulate the counteranion, leading to the formation of compounds with the structural formulas {[Ce(NO3)2(L1)2]X<middle dot>H2O} n , where X = ClO4 - (1), PF6 - (2), or BF4 - (3), and {[Ce(NO3)2(L2)2]X<middle dot>CH3CN} n , where X = ClO4 - (4), PF6 - (5), or BF4 - (6), as well as the isostructural reference compound {Nd(NO3)2(L1)2]BF4<middle dot>CH3CN} n (3Nd). A combination of static and dynamic magnetic measurements demonstrates the good isolation of the CeIII centers and a field-induced slow relaxation of the magnetization. Correlations between the temperature and field-dependent magnetic relaxation data and ultralow-frequency Raman spectroscopy reveal the presence of a vibronic barrier driving magnetic relaxation. Theoretical calculations have been performed to elucidate the nonparticipation of the electronic excited states in the main relaxation processes.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10402 - Inorganic and nuclear chemistry
Návaznosti výsledku
Projekt
<a href="/cs/project/GA23-07175S" target="_blank" >GA23-07175S: Semikoordinace: cesta k chemicky stabilním molekulárním nanomagnetům</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2025
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
INORGANIC CHEMISTRY
ISSN
0020-1669
e-ISSN
1520-510X
Svazek periodika
64
Číslo periodika v rámci svazku
8
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
12
Strana od-do
3735-3746
Kód UT WoS článku
001424798400001
EID výsledku v databázi Scopus
2-s2.0-85217964576