We report a high-efficiency photoinduced phase transition in a spin-crossover complex [FeL(CN)2]∙H2O (where L is a N3O2 Schiff-base macrocyclic ligand). A single-shot laser pulse (8ns duration) is applied to induce the phase transformation, exhibiting molecular-structural, chromatic, and magnetic changes inside a thermal hysteresis loop (216K). The condensation of long lifetime photoexcited high-spin sites accounts for the cooperative photoexcitation process.
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Liu et al. (2005) studied this question.
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