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A Magneto‐optical Molecular Device: Interplay of Spin Crossover, Luminescence, Photomagnetism, and Photochromism
Author(s) -
Estrader Marta,
Salinas Uber Jorge,
Barrios Leoní A.,
Garcia Jordi,
LloydWilliams Paul,
Roubeau Olivier,
Teat Simon J.,
Aromí Guillem
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201709136
Subject(s) - photochromism , spin crossover , photoisomerization , photochemistry , luminescence , fluorescence , ligand (biochemistry) , diarylethene , chemistry , materials science , irradiation , optoelectronics , crystallography , optics , isomerization , catalysis , organic chemistry , physics , biochemistry , receptor , nuclear physics
A bis(pyrazolylpyridyl) ligand, L, containing a central photochromic dithienylethene spacer predictably forms a ferrous [Fe 2 L 3 ] 4+ helicate exhibiting spin crossover (SCO). In solution, the compound [Fe 2 L 3 ](ClO 4 ) 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.