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

Suryadevara, Nithin 1; Pausch, Ansgar ORCID iD icon 2; Moreno-Pineda, Eufemio; Mizuno, Asato 1; Bürck, Jochen 3; Baksi, Ananya 1; Hochdörffer, Tim; Šalitroš, Ivan; Ulrich, Anne S. 3; Kappes, Manfred M. 2; Schünemann, Volker; Klopper, Wim ORCID iD icon 2; Ruben, Mario 4
1 Karlsruher Institut für Technologie (KIT)
2 Institut für Physikalische Chemie (IPC), Karlsruher Institut für Technologie (KIT)
3 Institut für Biologische Grenzflächen (IBG), Karlsruher Institut für Technologie (KIT)
4 Institut für Quantenmaterialien und -technologien (IQMT), Karlsruher Institut für Technologie (KIT)


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. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136151
Veröffentlicht am 12.08.2021
DOI: 10.1002/chem.202101432
Zitationen: 4
Web of Science
Zitationen: 4
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Nanotechnologie (INT)
Institut für Physikalische Chemie (IPC)
Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0947-6539, 1521-3765
KITopen-ID: 1000136151
HGF-Programm 47.12.02 (POF IV, LK 01) Exploratory Qubits
Weitere HGF-Programme 47.14.01 (POF IV, LK 01) Molekular Information Processing in Cellular Systems
Erschienen in Chemistry - A European Journal
Verlag John Wiley and Sons
Band 27
Heft 61
Seiten 15172-15180
Vorab online veröffentlicht am 24.06.2021
Nachgewiesen in Scopus
Web of Science
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