Synthesis, crystal structure, Fe-57 Mossbauer spectroscopy and magnetic properties of high-spin iron(III) anionic complexes [Fe(azp)(2)](-) (H(2)azp=2,2 '- dihydroxyazobenzene) with organic cations
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73615106" target="_blank" >RIV/61989592:15310/22:73615106 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0277538721005684" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0277538721005684</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.poly.2021.115586" target="_blank" >10.1016/j.poly.2021.115586</a>
Alternative languages
Result language
angličtina
Original language name
Synthesis, crystal structure, Fe-57 Mossbauer spectroscopy and magnetic properties of high-spin iron(III) anionic complexes [Fe(azp)(2)](-) (H(2)azp=2,2 '- dihydroxyazobenzene) with organic cations
Original language description
Two new iron(III) complexes, (TrBA)[Fe(azp)(2)] (1) and (TrPA)[Fe(azp)(2)] (2) (H(2)azp = 2,2' - dihydrox-yazobenzene, TrBA = tributylammonium and TrPA = tripropylammonium) were prepared by reaction of the azo dye H(2)azp, tributylamine (or tripropylamine) and FeCl3 in methanolic solution. The crystal structure of 1 was determined by single-crystal X-ray analysis. The asymmetric unit contains one tributylamonnium cation and one [Fe(azp)(2)](-) anion with an octahedrally coordinated Fe(III) ion with an FeN2O4 chromophore - the tridentate ligand azp(2-) is coordinated by two deprotonated phenolic oxygen atoms and one nitrogen atom from the azo group. The single-crystal X-ray analysis of 1 suggests that an N-H center dot center dot center dot O hydrogen bonding interaction between the TrBA cation and the [Fe(azp)(2)](-) anion may induce distortion of the coordination polyhedron resulting in a highspin complex. Magnetic investigation (DC magnetic data) revealed a high-spin state in the studied temperature range (2-300 K) for both 1 and 2. AC susceptibility measurements for 1 showed a field-induced slow relaxation of magnetization with an atypical temperature dependence of the relaxation time. Moreover, the cryogenic and room temperature Fe-57 Mossbauer spectroscopy parameters confirmed the high-spin state of 1. The study was also supported by theoretical calculations at the DFT level of theory.
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
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
POLYHEDRON
ISSN
0277-5387
e-ISSN
1873-3719
Volume of the periodical
212
Issue of the periodical within the volume
JAN
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
"115586-1"-"115586-7"
UT code for WoS article
000751049900004
EID of the result in the Scopus database
2-s2.0-85120379621