Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/177733
New highly charged iron(III) metal-organic cube stabilized by a bulky amine.
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
In this work, we report a new octanuclear cluster based on FeIII and the ligand 1H-imidazole-4,5-dicarboxylic acid, [Et3NH]12[Fe8(IDC)12]·10DMF·13H2O (1), with a metal core containing eight FeIII connected by only one type of organic ligand. A peak at 573 m/z in the mass spectra of the compound suggests the adduct species {[Fe8(IDC)12]+8H}4-. By X-ray photoelectron spectroscopy, the oxidation state of the iron cation was confirmed to be 3+, also identifying the presence of a quaternary nitrogen species, which act as a countercation of the anionic metal core [Fe8(IDC)12]12-. Mössbauer spectra recorded at different temperatures show an isomer shift and quadrupole splitting parameters that confirm the existence of only FeIII-HS in the structure of 1. X-ray analysis reveals that compound 1 crystallizes in the orthorhombic system space group Ibam, confirming a molecular cluster structure with an almost regular cube as geometry, with the FeIII atoms located at the corners of the cube and connected by μ-1κ2 N,O:2κ2 N',O‴-IDC3- bridges. Additionally, the magnetic measurements reveal a weak antiferromagnetic coupling in the Fe8 III coordination cluster (J = -3.8 cm-1). To the best of our knowledge, 1 is the first member of the family of cubes assembled with 1H-imidazole-4,5-dicarboxylic acid and FeIII cation, exhibiting high pH stability over a broad pH range, making it an ideal candidate for the design of supramolecular structures and metal-organic frameworks.
Matèries (anglès)
Citació
Citació
CRUZ, Carlos, VEGA CARVALLO, Andrés igor, SPODINE, Evgenia, ESCUER FITÉ, Albert, MARCO, José f., MENÉNDEZ, Nieves, VENEGAS-YAZIGI, Diego, PAREDES GARCÍA, Verónica. New highly charged iron(III) metal-organic cube stabilized by a bulky amine.. _ACS Omega _. 2020. Vol. 5, núm. 35, pàgs. 22238-22247. [consulta: 25 de gener de 2026]. ISSN: 2470-1343. [Disponible a: https://hdl.handle.net/2445/177733]