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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

Two new iron(III) complexes, (TrBA)[Fe(azp)(2)] (1) and (TrPA)[Fe(azp)(2)] (2) (H(2)azp = 2,2&apos; - 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

Two new iron(III) complexes, (TrBA)[Fe(azp)(2)] (1) and (TrPA)[Fe(azp)(2)] (2) (H(2)azp = 2,2&apos; - 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.

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

2022

Kód důvěrnosti údajů

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

Název periodika

POLYHEDRON

ISSN

0277-5387

e-ISSN

1873-3719

Svazek periodika

212

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

"115586-1"-"115586-7"

Kód UT WoS článku

000751049900004

EID výsledku v databázi Scopus

2-s2.0-85120379621