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The magnetic coupling of an experimentally well characterized photoswitchable system, a diarylethene functionalized by two nitronyl nitroxides spin carriers, is investigated at Density Functional Theory (DFT) level allowing for a semi-quantitative description of their magnetic coupling. Based on the analysis of computed spin density patterns, the same computational approach is then applied to the design of new photoswitchable molecules in order to selectively modulate both the strength and the nature of the magnetic coupling.
Graphical abstract Graphical abstract Highlights

  • ► DFT modeling of photoswitchable systems. ► Broken Symmetry approach. ► Molecular design of new photomagnetic systems.

    Authors:   Diane Bousquet, Cyril Peltier, Charles Masselin, Denis Jacquemin, Carlo Adamo, Ilaria Ciofini
    Journal:   Chemical Physics Letters
    Year:   2012
    DOI:   10.1016/j.cplett.2012.05.040
    Publication date:   09-07-2012
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