Hysteresis Photomodulation within photochromic assemblies of Dy(Tp2-py)F]$^+$ Single‐Molecule Magnets : Influence of the supramolecular magnetic couplings
Résumé
A 1D coordination compound made of a photochromic dithienylethene linker and [Dy(Tp2-py)F]$^+$ units (with Tp2-py = tris(3‐(2‐pyridyl)pyrazolyl)hydroborate) and having tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate counterions is reported. Full photoconversion from the closed isomer to the open isomer of the dithienyethene within single crystals allow for monitoring of the transformation by photocrystallography. Magnetic slow relaxation as well as magnetic hysteresis are observed and can be both modulated upon light irradiation. Comparison with previously published structures with similar components highlights the role of the supramolecular organization, and of dipolar couplings within these compounds, in driving the nature of the observed hysteresis photomodulation.
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