A Magneto‐optical Molecular Device: Interplay of Spin Crossover, Luminescence, Photomagnetism, and Photochromism

A bis(pyrazolylpyridyl) ligand, L, containing a central photochromic dithienylethene spacer predictably forms a ferrous [Fe2L3]4+ helicate exhibiting spin crossover (SCO). In solution, the compound [Fe2L3](ClO4)4 (1) preserves the magnetic properties and is fluorescent. The structure of 1 is photo‐s...

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Bibliographic Details
Published in:Angewandte Chemie 2017-12, Vol.129 (49), p.15828-15833
Main Authors: Estrader, Marta, Salinas Uber, Jorge, Barrios, Leoní A., Garcia, Jordi, Lloyd‐Williams, Paul, Roubeau, Olivier, Teat, Simon J., Aromí, Guillem
Format: Article
Language:English
Subjects:
Chemistry
Dithienylethen
Fluorescence
Fluoreszenz
Irradiation
Magnetic properties
Magnetism
Molekulare Baueinheiten
Photochromism
Photoschaltung
Spacer
Spin-Crossover
Switches
Ultraviolet radiation
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Summary:A bis(pyrazolylpyridyl) ligand, L, containing a central photochromic dithienylethene spacer predictably forms a ferrous [Fe2L3]4+ helicate exhibiting spin crossover (SCO). In solution, the compound [Fe2L3](ClO4)4 (1) preserves the magnetic properties and is fluorescent. The structure of 1 is photo‐switchable following the reversible ring closure/opening of the central dithienylethene via irradiation with UV/visible light. This photoisomerization switches on and off some emission bands of 1 and provides a means of externally manipulating the magnetic properties of the assembly. Ein eisenhaltiges Spin‐Crossover‐Molekül mit einer photoschaltbaren Einheit wurde hergestellt. Durch diese Einheit lassen sich seine magnetischen Eigenschaften und seine Fluoreszenzantwort mithilfe von Licht reversibel schalten.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201709136