TY - JOUR AU - Tissot, Antoine AU - Boillot, Marie-Laure AU - Pillet, Sébastien AU - Codjovi, Epiphane AU - Boukheddaden, Kamel AU - Lawson Daku, Latévi Max TI - Unidirectional Photoisomerization of Styrylpyridine for Switching the Magnetic Behavior of an Iron(II) Complex: A MLCT Pathway in Crystalline Solids PY - 2010 JF - Journal of Physical Chemistry C JA - J. Phys. Chem. C SN - 1932-7447 VL - 114 IS - 49 SP - 21715 EP - 21722 L1 - http://pubs.acs.org/doi/pdf/10.1021/jp106583f L2 - http://pubs.acs.org/doi/full/10.1021/jp106583f L3 - http://pubs.acs.org/doi/abs/10.1021/jp106583f L4 - http://www.unige.ch/sciences/chifi/publis/pics/double/ref01213.png M3 - 10.1021/jp106583f UR - http://dx.doi.org/10.1021/jp106583f N2 - The photoreactivity of two iron(II)−styrylpyridine frameworks Fe(stpy)4(NCSe)2 (stpy = 4-styrylpyridine) has been investigated for the very first time in a crystalline solid. A quantitative cis-to-trans isomerization of stilbenoids is shown to occur in the confined environment of the inorganic solid. The photochromic reaction was driven by a visible excitation into the metal-to-ligand charge transfer absorption of the high-spin all-cis complex. The solid-state transformation is accompanied by a unit-cell volume increase and an amorphization. Interestingly, the photoproduct formed by irradiating the high-spin all-cis reactant undergoes a spin conversion when the temperature is decreased. This observation is related to the “ligand-driven light-induced spin change” effect in a constrained environment. ID - 1213 ER -