Publication detail

Chiral Resolution of Spin-Crossover Active Iron(II) [2x2] Grid Complexes

SURYADEVARA, N. PAUSCH, A. MORENO-PINEDA, E. MIZUNO, A. BUERCK, J. BAKSI, A. HOCHDORFER, T. ŠALITROŠ, I. ULRICH, A.S. KAPPES, M.M. SCHUNEMANN, V. KLOPPER, W. RUBEN, M.

Original Title

Chiral Resolution of Spin-Crossover Active Iron(II) [2x2] Grid Complexes

Type

journal article in Web of Science

Language

English

Original Abstract

Chiral magnetic materials are proposed for applications in second-order non-linear optics, magneto-chiral dichroism, among others. Recently, we have reported a set of tetra-nuclear Fe(II) grid complex conformers with general formula C/S-[Fe4L4](8+) (L: 2,6-bis(6-(pyrazol-1-yl)pyridin-2-yl)-1,5-dihydrobenzo[1,2-d : 4,5-d ']diimidazole). In the grid complexes, isomerism emerges from tautomerism and conformational isomerism of the ligand L, and the S-type grid complex is chiral, which originates from different non-centrosymmetric spatial organization of the trans type ligand around the Fe(II) center. However, the selective preparation of an enantiomerically pure grid complex in a controlled manner is difficult due to spontaneous self-assembly. To achieve the pre-synthesis programmable resolution of Fe(II) grid complexes, we designed and synthesized two novel intrinsically chiral ligands by appending chiral moieties to the parent ligand. The complexation of these chiral ligands with Fe(II) salt resulted in the formation of enantiomerically pure Fe(II) grid complexes, as unambiguously elucidated by CD and XRD studies. The enantiomeric complexes exhibited similar gradual and half-complete thermal and photo-induced SCO characteristics. The good agreement between the experimentally obtained and calculated CD spectra further supports the enantiomeric purity of the complexes and even the magnetic studies. The chiral resolution of Fe(II)- [2x2] grid complexes reported in this study, for the first time, might enable the fabrication of magneto-chiral molecular devices.

Keywords

chirality; grid complexes; ion mobility; Mossbauer spectroscopy; spin-crossover

Authors

SURYADEVARA, N.; PAUSCH, A.; MORENO-PINEDA, E.; MIZUNO, A.; BUERCK, J.; BAKSI, A.; HOCHDORFER, T.; ŠALITROŠ, I.; ULRICH, A.S.; KAPPES, M.M.; SCHUNEMANN, V.; KLOPPER, W.; RUBEN, M.

Released

2. 11. 2021

Publisher

WILEY-V C H VERLAG GMBH

Location

WEINHEIM

ISBN

1521-3765

Periodical

Chemistry - A European Journal

Year of study

27

Number

61

State

Federal Republic of Germany

Pages from

15171

Pages to

15179

Pages count

9

URL

https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101432

BibTex

@article{BUT173093,
  author="SURYADEVARA, N. and PAUSCH, A. and MORENO-PINEDA, E. and MIZUNO, A. and BUERCK, J. and BAKSI, A. and HOCHDORFER, T. and ŠALITROŠ, I. and ULRICH, A.S. and KAPPES, M.M. and SCHUNEMANN, V. and KLOPPER, W. and RUBEN, M.",
  title="Chiral Resolution of Spin-Crossover Active Iron(II) [2x2] Grid Complexes",
  journal="Chemistry - A European Journal",
  year="2021",
  volume="27",
  number="61",
  pages="15171--15179",
  doi="10.1002/chem.202101432",
  issn="1521-3765",
  url="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/chem.202101432"
}