%0 Journal Article %A Chakraborty, Pradip %A Enachescu, Cristian %A Humair, Arnaud %A Egger, Leo %A Delgado, Teresa %A Tissot, Antoine %A Guénée, Laure %A Besnard, Céline %A Bronisz, Robert %A Hauser, Andreas %T Light-induced spin-state switching in the mixed crystal series of the 2D coordination network {[Zn1-xFex(bbtr)3](BF4)2}: optical spectroscopy and cooperative effects %J Dalton Transactions %@ 1477-9226 %V 43 %N 47 %P 17786-17796 %D 2014 %U http://pubs.rsc.org/en/Content/ArticleLanding/2014/DT/C4DT01728E %R 10.1039/C4DT01728E %U http://archive-ouverte.unige.ch/unige:42340 %X Depending on the iron(II) concentration, the mixed crystals of {[Zn1-xFex(bbtr)3](BF4)2}∞, bbtr = 1,4-di(1,2,3-triazol-1-yl)butane, 0.01 ≤ x ≤ 1, show macroscopic light-induced bistability between the high-spin and the low-spin state. In the highly diluted system with x = 0.01 and up to x = 0.31, the photoinduced low-spin state always relaxes back to the high-spin state independent of the initial light-induced low-spin fraction. In the highly concentrated mixed crystals with x = 0.67, 0.87 and 1, the strong cooperative effects coupled to a crystallographic phase transition result in light-induced bistability with decreasing critical light-induced low-spin fraction and increasing hysteresis width for increasing iron(II) concentrations. The lower limit for the light-induced bistability is estimated at x ≈ 0.5.