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Biphenyl bridged hexadentate N6-ligands : a rigid ligand backbone for Fe(II) spin crossover complexes

Title data

Heider, Silvio ; Petzold, Holm ; Chastanet, Guillaume ; Schlamp, Stephan ; Rüffer, Tobias ; Weber, Birgit ; Létard, Jean-François:
Biphenyl bridged hexadentate N6-ligands : a rigid ligand backbone for Fe(II) spin crossover complexes.
In: Dalton Transactions. Vol. 42 (2013) Issue 24 . - pp. 8575-8584.
ISSN 1477-9234
DOI: https://doi.org/10.1039/C2DT32451B

Abstract in another language

The novel hexadentate nitrogen based ligand N,N′-bis-(2-(1H-pyrazol-1-yl)pyridine-6-ylmethyl)-2,2′-biphenylenediamine (3) was synthesized and used for the preparation of iron Spin Crossover (SCO) complexes [Fe(3)][BF4]2 (4) and [Fe(3)][ClO4]2 (5), which differ only by the respective counter ion. These complex salts show different spin transition temperatures T1/2 (135 and 157 K, respectively). This effect was studied by the investigation of the solid state structure of different low- and high-spin isomers. All complexes of this series show closely related crystal packing regardless of the counter ion, metal (Zn/Fe) and spin state. The isomer exhibiting the lower transition temperature (4) was also investigated in respect to its photomagnetic behaviour. The LIESST process could be monitored for this complex, but no reverse-LIESST was observed. The relaxation of the photo-induced state occurs at ca. 80 K, showing a complex, three-state relaxation mechanism.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry IV > Chair Anorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry IV
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 26 Jul 2017 10:41
Last Modified: 26 Jul 2017 10:41
URI: https://eref.uni-bayreuth.de/id/eprint/38816