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Updated: Feb 20, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
A Magneto-optical Molecular Device: Interplay of Spin Crossover, Luminescence, Photomagnetism, and Photochromism
Marta Estrader1,2, Jorge Salinas Uber1, Leoní A Barrios1
1Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Diagonal 645, 08038, Barcelona, Spain.
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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