Lanthanide-based F-MOFs: Structure, hydrolytic stability, spectral and magnetic properties
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10486298" target="_blank" >RIV/00216208:11310/24:10486298 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/24:00138429 RIV/61988987:17310/24:A25038BD
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=X6MC20JgD3" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=X6MC20JgD3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jssc.2024.124949" target="_blank" >10.1016/j.jssc.2024.124949</a>
Alternative languages
Result language
angličtina
Original language name
Lanthanide-based F-MOFs: Structure, hydrolytic stability, spectral and magnetic properties
Original language description
A series of five novel lanthanide-based fluorinated metal-organic frameworks (Ln-F-MOFs) have been synthesized under solvothermal conditions by the reaction of 3,3 '-bis(trifluoromethyl)-[1,1 '-biphenyl]-4,4 '-dicarboxylic acid (H2L) and lanthanide Ln(III) ions (Ln(III)-La, Ce, Pr, Nd and Eu). Powder X-ray diffraction (PXRD) analysis revealed that all prepared complexes are isostructural. A single-crystal X-ray crystallographic study of one representative of the isostructural group, namely {[La-2(L)(3)(DMF)(2)(H2O)(2)]}(n) showed, that compound crystallizes in a triclinic system with space group P-1. The lattice parameter values are a = 8.563(2) angstrom, b = 13.199(3) angstrom, c = 16.008(4) angstrom, alpha = 104.588(7) degrees, beta = 92.904(7) degrees and gamma = 92.717(7) degrees, with two formula units in the unit cell. The overall structure is formed by 2D polymeric layers, which are arranged into a semi-3D supramolecular structure through hydrogen bonds and other intramolecular interactions. The study of the hydrophobic properties of the complexes showed that the complexes exhibit surface hydrophobicity with a "rose petal effect" and a contact angle of approximately 107 degrees. However, the structures are not hydrolytically stable in the long term and the structure starts to delaminate after two days in water. This is a manifestation of the fact that the complexes do not form a 3D polymer network, it is made up of 2D layers connected only by weak non-bonding interactions. The photoluminescence properties of the Ln(III) complexes are determined by the characteristic 5d-4f or 4f-4f electron transitions for the individual lanthanide ions. The magnetic properties of Nd(III), Pr(III) and Eu(III) variants were studied. The magnetic properties of {[Pr-2(L)(3)(DMF)(2)(H2O)(2)]}(n) are characterized by the presence of a low-lying quasi-doublet with 15.6 cm(-1) energy splitting, whereas Eu(III) variant is nonmagnetic at low temperatures, but the magnetic F-7(1) state is accessible by thermal excitation. For Nd(III) complex, the X-band EPR measurements were performed. Since 1D channels with dimensions of 4.90 x 7.23 angstrom(2) are present within the structure, the adsorption of N-2, CO2 and H-2 gases was also studied.
Czech name
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Czech description
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Classification
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
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Solid State Chemistry
ISSN
0022-4596
e-ISSN
1095-726X
Volume of the periodical
339
Issue of the periodical within the volume
November
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
124949
UT code for WoS article
001295710700001
EID of the result in the Scopus database
2-s2.0-85201089186