@Article{JPhysChemC_114_21715, author = {A. Tissot and M.-L. Boillot and S. Pillet and E. Codjovi and K. Boukheddaden and L.M. {Lawson Daku}}, title = {{Unidirectional Photoisomerization of Styrylpyridine for Switching the Magnetic Behavior of an Iron(II) Complex: A MLCT Pathway in Crystalline Solids}}, journal= {J. Phys. Chem. C}, ISSN = {1932-7447}, volume= {114}, number= {49}, pages = {21715-21722}, url = {http://pubs.acs.org/doi/abs/10.1021/jp106583f}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref01213.pdf}, doi= {10.1021/jp106583f}, abstract = {{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.}}, year = {2010} }