Publication detail

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

GARCÍA LOPEZ, V. EL MANSOUR EL JASTIMI, H. JURÁKOVÁ, J. CLEMENTE-LEON, M. CORONADO, E.

Original Title

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

Type

journal article in Web of Science

Language

English

Original Abstract

Three solvatomorphs of the iron(II) complex of 2,6di[4-(ethylcarboxy)pyrazol-1-yl]pyridine (bpCOOEt2p) of formulas [Fe(bpCOOEt2p)2](ClO4)2 center dot 1.5MeNO2 (1), [Fe(bpCOOEt2p)2]-(ClO4)2 center dot MeNO2 (2), and [Fe(bpCOOEt2p)2](ClO4)2 center dot 2MeNO2 (3) have been prepared and characterized. They show interesting spin crossover (SCO) properties ranging from partial to complete thermal spin 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 center dot MeNO2 (2 center dot MeNO2), [Fe(bpCOOEt2p)2](ClO4)2 center dot MeCN (2 center dot MeCN), [Fe(bpCOOEt2p)2]-(ClO4)2 center dot 0.5Me2CO (2 center dot Me2CO), and [Fe(bpCOOEt2p)2](ClO4)2 center dot MeCOOH (2 center dot 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 center dot Me2CO and the high-spin state in 2 center dot MeCN. Therefore, the SCO properties of 2 can be tuned in a reversible way by exposure to different solvents.

Keywords

CRITICAL-TEMPERATURE; TRANSFORMATION

Authors

GARCÍA LOPEZ, V.; EL MANSOUR EL JASTIMI, H.; JURÁKOVÁ, J.; CLEMENTE-LEON, M.; CORONADO, E.

Released

5. 4. 2023

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1528-7505

Periodical

Crystal Growth and Design

Year of study

23

Number

4

State

United States of America

Pages from

2730

Pages to

2738

Pages count

9

URL

https://pubs.acs.org/doi/10.1021/acs.cgd.2c01524

BibTex

@article{BUT183959,
  author="GARCÍA LOPEZ, V. and EL MANSOUR EL JASTIMI, H. and JURÁKOVÁ, J. and CLEMENTE-LEON, M. and CORONADO, E.",
  title="Iron(II) Complexes of 2,6-Di[4-(ethylcarboxy)pyrazol-1-yl]pyridine with Reversible Guest-Modulated Spin-Crossover Behavior",
  journal="Crystal Growth and Design",
  year="2023",
  volume="23",
  number="4",
  pages="2730--2738",
  doi="10.1021/acs.cgd.2c01524",
  issn="1528-7505",
  url="https://pubs.acs.org/doi/10.1021/acs.cgd.2c01524"
}