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Iron(II) Complexes of 2,6-Di[4-(ethylcarboxy)pyrazol-1-yl]pyridine with Reversible Guest-Modulated Spin-Crossover Behavior

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Iron(II) Complexes of 2,6-Di[4-(ethylcarboxy)pyrazol-1-yl]pyridine with Reversible Guest-Modulated Spin-Crossover Behavior

dc.contributor.author	García López, Víctor
dc.contributor.author	El Mansour El Jastimi, Hanane
dc.contributor.author	Juráková, Jana
dc.contributor.author	Clemente León, Miguel
dc.contributor.author	Coronado Miralles, Eugenio
dc.date.accessioned	2023-11-02T10:34:52Z
dc.date.available	2023-11-02T10:34:52Z
dc.date.issued	2023
dc.identifier.uri	https://hdl.handle.net/10550/90787
dc.description.abstract	Three solvatomorphs of the iron(II) complex of 2,6-di[4-(ethylcarboxy)pyrazol-1-yl]pyridine (bpCOOEt2p) of formulas [Fe(bpCOOEt2p)2](ClO4)2·1.5MeNO2 (1), [Fe(bpCOOEt2p)2](ClO4)2·MeNO2 (2), and [Fe(bpCOOEt2p)2](ClO4)2·2MeNO2 (3) have been prepared and characterized. They show interesting spin-crossover (SCO) properties ranging from partial to complete thermalspin transitions and a light-induced excited spin-state trapping (LIESST) effect. In solvatomorph 2, a robust structure is formed with channels that enable the entrance or removal of solvent molecules by vapor diffusion without losing the crystallinity. Thus, solvent-exchanged samples [Fe(bpCOOEt2p)2](ClO4)2·MeNO2 (2·MeNO2), [Fe(bpCOOEt2p)2(ClO4)2·MeCN (2·MeCN), [Fe(bpCOOEt2p)2](ClO4)2·0.5Me2CO (2·Me2CO), and [Fe(bpCOOEt2p)2](ClO4)2· MeCOOH (2·MeCOOH) were prepared by vapor diffusion of the solvents in a crystal of the compound previously heated to 400 K in a single-crystal to single-crystal (SCSC) fashion. Interestingly, this causes a change of spin state with a stabilization of the low-spin state in 2·Me2CO and the high-spin state in 2·MeCN. Therefore, the SCO properties of 2 can be tuned in a reversible way by exposure to different solvents.
dc.language.iso	eng
dc.relation.ispartof	Crystal Growth & Design, 2023, vol. 23, num. 4, p. 2730-2738
dc.source	García López, Víctor El Mansour El Jastimi, Hanane Juráková, Jana Clemente León, Miguel Coronado Miralles, Eugenio 2023 Iron(II) Complexes of 2,6-Di[4-(ethylcarboxy)pyrazol-1-yl]pyridine with Reversible Guest-Modulated Spin-Crossover Behavior Crystal Growth & Design 23 4 2730 2738
dc.subject	Química
dc.subject	Materials
dc.title	Iron(II) Complexes of 2,6-Di[4-(ethylcarboxy)pyrazol-1-yl]pyridine with Reversible Guest-Modulated Spin-Crossover Behavior
dc.type	journal article
dc.date.updated	2023-11-02T10:34:53Z
dc.identifier.doi	10.1021/acs.cgd.2c01524
dc.identifier.idgrec	157381
dc.rights.accessRights	open access