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Heteroleptic Iron(II) Spin-Crossover Complexes Based on a 2,6-Bis(pyrazol-1-yl)pyridine-type Ligand Functionalized with a Carboxylic Acid

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Heteroleptic Iron(II) Spin-Crossover Complexes Based on a 2,6-Bis(pyrazol-1-yl)pyridine-type Ligand Functionalized with a Carboxylic Acid

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dc.contributor.author	García López, Víctor
dc.contributor.author	Palacios-Corella, M.
dc.contributor.author	Gironés-Pérez, Verónica
dc.contributor.author	Bartual Murgui, Carlos
dc.contributor.author	Real Cabezos, José Antonio
dc.contributor.author	Pellegrin, Eric
dc.contributor.author	Herrero-Martín, Javier
dc.contributor.author	Aromí, Guillem
dc.contributor.author	Clemente León, Miguel
dc.contributor.author	Coronado Miralles, Eugenio
dc.date.accessioned	2020-05-11T08:45:30Z
dc.date.available	2020-05-11T08:45:30Z
dc.date.issued	2019
dc.identifier.citation	García López, Víctor Palacios-Corella, M. Gironés-Pérez, Verónica Bartual Murgui, Carlos Real Cabezos, José Antonio Pellegrin, Eric Herrero-Martín, Javier Aromí, Guillem Clemente León, Miguel Coronado Miralles, Eugenio 2019 Heteroleptic Iron(II) Spin-Crossover Complexes Based on a 2,6-Bis(pyrazol-1-yl)pyridine-type Ligand Functionalized with a Carboxylic Acid Inorganic Chemistry 58 12199 12208
dc.identifier.uri	https://hdl.handle.net/10550/74555
dc.description.abstract	Two new heteroleptic complexes [Fe- (1bppCOOH)(3bpp-bph)](ClO4)2·solv (1·solv, solv = various solvents; 1bppCOOH = 2,6-bis(1H-pyrazol-1-yl)- isonicotinic acid; 3bpp-bph = 2,6-bis(5-([1,1′-biphenyl]-4- yl)-1H-pyrazol-3-yl)pyridine) and [Fe(1bppCOOH)- (1bppCOOEt)](ClO4)2 ·0.5Me2CO (2·0.5Me2CO, 1bppCOOEt = ethyl 2,6-bis(1H-pyrazol-1-yl)isonicotinate) were designed and prepared. The heteroleptic compound 1· solv was obtained by the combination of stoichiometric amounts of Fe(ClO4)2, 1bppCOOH, and 3bpp-bph, and it was designed to fine-tune the spin crossover (SCO) properties with respect to the previously reported homoleptic compound [Fe(1bppCOOH)2](ClO4)2. Indeed, the introduction of a new substituted 3bpp ligand induces a weaker ligand field in addition to promoting the formation of π···π and C−H···π intermolecular interactions through the biphenyl groups. For the desolvated counterpart 1, this results in a shift of the SCO curve toward room temperature and the observation of a 13 K hysteresis width. Besides, compound 2·0.5Me2CO, which represents the first example of a heteroleptic complex containing two 1bpp tridentate ligands, stabilizes the LS state at room temperature confirming the same trend observed for the corresponding homoleptic compounds. Interestingly, both 1 and 2·0.5Me2CO heteroleptic complexes exhibit photoswitchable properties when irradiating with a 523 nm laser at 10 K. Preliminary characterization of the deposited complexes on native SiO2 by X-ray absorption measurements suggests oxidation and decomposition of the complexes.
dc.language.iso	eng
dc.relation.ispartof	Inorganic Chemistry, 2019, vol. 58, p. 12199-12208
dc.subject	Química organometàl·lica
dc.subject	Compostos de coordinació
dc.subject	Enllaços químics
dc.title	Heteroleptic Iron(II) Spin-Crossover Complexes Based on a 2,6-Bis(pyrazol-1-yl)pyridine-type Ligand Functionalized with a Carboxylic Acid
dc.type	journal article	es_ES
dc.date.updated	2020-05-11T08:45:31Z
dc.identifier.doi	10.1021/acs.inorgchem.9b01526
dc.identifier.idgrec	134324
dc.rights.accessRights	open access	es_ES