Publication detail

Low-spin and spin-crossover iron(ii) complexes with pyridyl-benzimidazole ligands: synthesis, and structural, magnetic and solution study

Brachnakova, B. Koziskova, JA. Kozisek, J. Melnikova, E. Gal, M. Herchel, R. Dubaj, T. Salitros, I.

Original Title

Low-spin and spin-crossover iron(ii) complexes with pyridyl-benzimidazole ligands: synthesis, and structural, magnetic and solution study

Type

journal article in Web of Science

Language

English

Original Abstract

Two tridentate ligands (L1 = 2,6-bis(1-(3,5-di-tert-butylbenzyl)-1H-benzimidazol-2-yl)pyridine and L2 = 2,6-bis(1-(4-tert-butylbenzyl)-1H-benzimidazol-2-yl)pyridine) and one didentate ligand (L3 = 1-(4-tert-butylbenzyl)-2-pyridine-2-yl-1H-benzimidazol) were used for the synthesis of eight mononuclear Fe(II) compounds 1-8 containing miscellaneous counterions. Single-crystal X-ray diffraction analysis confirmed the expected molecular structures of all the reported coordination compounds and revealed the octahedral geometry of metal centres in the complex dications of 1-8. Compounds 1-6 prepared from tridentate ligands were low-spin and, therefore, diamagnetic up to 400 K. On the other hand, compounds 7 and 8, in which the Fe(II) centre was coordinated with didentate ligand L3, exhibited temperature and light triggered spin-crossover behaviour. The theoretical calculations supported the experimental magnetic investigation and helped to explain the electronic structures of the reported complexes with respect to the occurrence of thermal and light induced spin state switching. In addition, the solution redox properties of compounds 1-8 were investigated by cyclic voltammetry.

Keywords

BASIS-SETSROOM-TEMPERATURE TRANSITION STATE VALENCE

Authors

Brachnakova, B.; Koziskova, JA.; Kozisek, J.; Melnikova, E.; Gal, M.; Herchel, R.; Dubaj, T.; Salitros, I.

Released

28. 12. 2020

Publisher

ROYAL SOC CHEMISTRY

Location

CAMBRIDGE

ISBN

1477-9234

Periodical

Dalton Transactions

Year of study

49

Number

48

State

United Kingdom of Great Britain and Northern Ireland

Pages from

17786

Pages to

17795

Pages count

10

URL

https://pubs.rsc.org/en/content/articlelanding/2020/DT/D0DT03497E

BibTex

@article{BUT176893,
  author="Brachnakova, B. and Koziskova, JA. and Kozisek, J. and Melnikova, E. and Gal, M. and Herchel, R. and Dubaj, T. and Salitros, I.",
  title="Low-spin and spin-crossover iron(ii) complexes with pyridyl-benzimidazole ligands: synthesis, and structural, magnetic and solution study",
  journal="Dalton Transactions",
  year="2020",
  volume="49",
  number="48",
  pages="17786--17795",
  doi="10.1039/d0dt03497e",
  issn="1477-9234",
  url="https://pubs.rsc.org/en/content/articlelanding/2020/DT/D0DT03497E"
}