The Carboxylate Twist: Hysteretic Bistability of a High-Spin Diiron(II) Complex Identified by Mössbauer Spectroscopy

The Carboxylate Twist: Hysteretic Bistability of a High-Spin Diiron(II) Complex Identified by Mössbauer Spectroscopy

In a twist: The carboxylate ligand in the clamp of a highly preorganized diferrous site shows temperature‐dependent dynamic behavior, coined the “carboxylate twist”. It leads to a fluctuation of the electric field gradient and thus averaged Mössbauer resonances at higher temperatures, resulting in m...

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Veröffentlicht in:Angewandte Chemie International Edition 2012-10, Vol.51 (40), p.10045-10049
Hauptverfasser: Burger, Boris, Demeshko, Serhiy, Bill, Eckhard, Dechert, Sebastian, Meyer, Franc
Format: Artikel
Sprache:eng
Schlagworte:
Biosensing Techniques
carboxylate ligands
Carboxylic Acids - chemistry
Coordination Complexes - chemistry
dinuclear complexes
Drug Stability
Iron - chemistry
iron complexes
magnetic properties
Molecular Structure
Mössbauer spectroscopy
Nanotechnology
Spectroscopy, Mossbauer
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Beschreibung
Zusammenfassung:In a twist: The carboxylate ligand in the clamp of a highly preorganized diferrous site shows temperature‐dependent dynamic behavior, coined the “carboxylate twist”. It leads to a fluctuation of the electric field gradient and thus averaged Mössbauer resonances at higher temperatures, resulting in magnetic and spectroscopic hysteresis even without any spin‐crossover or valence tautomerism.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201202759