Cerium-Based Metal-Organic Frameworks: Unveiling the Role of Terahertz Vibrations in the Spin Relaxation Dynamics

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Cerium-Based Metal-Organic Frameworks: Unveiling the Role of Terahertz Vibrations in the Spin Relaxation Dynamics
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
<a href="/en/project/GA23-07175S" target="_blank" >GA23-07175S: Semicoordination: a route to chemically stable molecular nanomagnets</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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