Author, as appears in the article.: Laurans M; Mattera M; Salles R; K'Bidi L; Gouzerh P; Renaudineau S; Volatron F; Guillemot G; Blanchard S; Izzet G; Solé-Daura A; Poblet JM; Proust A
Department: Química Física i Inorgànica
URV's Author/s: Poblet Rius, Josep Maria / Solé Daura, Albert
Keywords: Molecular-orbital methods vibrational investigations redox potentials post-functionalization metal-oxide clusters magnetic-properties heteropoly blues electron delocalization charge-separation ab-initio calculation
Abstract: The mixed molybdenum/tungsten Keggin-type polyoxometalate (POM) hybrid (TBA)4[PW9Mo2O39{Sn(C6H4I)}] (TBA = tert-butylammonium) has been prepared by the reaction between [α-PW9Mo2O39]7- and [Cl3Sn(C6H4I)] in dried acetonitrile, in the presence of tetra-n-butylammonium bromide. A further coupling reaction affords the ferrocenyl derivative (TBA)4[PW9Mo2O39{Sn(C6H4)C≡C(C6H4)Fc}]. The POM hybrids have been thoroughly characterized by NMR and IR spectroscopies. Electrochemical analysis confirms their ease of reduction compared to the all-W analogue, albeit with a second reduction process occurring at a lower potential than in the all-Mo species. It is noteworthy that the second reduction is accompanied by an unusual red shift of the electronic absorption spectrum. Whereas there is no doubt that the first reduction deals with Mo, the location of the second electron in the bireduced species, on the second Mo or on W, has thus been the subject of a cross-investigation by spectroelectrochemistry, electron spin resonance, and theoretical calculations. Finally, it came out that the second reduction is also Mo-centered with two unpaired and antiferromagnetically coupled extra electrons.
Thematic Areas: Química Physical and theoretical chemistry Medicina i Materiais Interdisciplinar Inorganic chemistry General medicine Farmacia Engenharias iii Engenharias ii Engenharias i Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Chemistry, inorganic & nuclear Chemistry (miscellaneous) Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: josepmaria.poblet@urv.cat
Author identifier: 0000-0002-4533-0623
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Inorganic Chemistry. 61 (20): 7700-7709
APA: Laurans M; Mattera M; Salles R; K'Bidi L; Gouzerh P; Renaudineau S; Volatron F; Guillemot G; Blanchard S; Izzet G; Solé-Daura A; Poblet JM; Proust A (2022). When Identification of the Reduction Sites in Mixed Molybdenum/Tungsten Keggin-Type Polyoxometalate Hybrids Turns Out Tricky. Inorganic Chemistry, 61(20), 7700-7709. DOI: 10.1021/acs.inorgchem.2c00866
Article's DOI: 10.1021/acs.inorgchem.2c00866
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications