A Magneto‐optical Molecular Device: Interplay of Spin Crossover, Luminescence, Photomagnetism, and Photochromism
Angewandte Chemie International Edition2017Vol. 56(49), pp. 15622–15627
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Marta Estrader, Jorge Salinas Uber, Leoní A. Barrios, Jordi García, Paul Lloyd‐Williams, Olivier Roubeau, Simon J. Teat, Guillem Aromí
Abstract
A bis(pyrazolylpyridyl) ligand, L, containing a central photochromic dithienylethene spacer predictably forms a ferrous [Fe2 L3 ]4+ helicate exhibiting spin crossover (SCO). In solution, the compound [Fe2 L3 ](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.
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