Abstract
The synthesis of biocompatible nanomaterials from synthetic organic molecules, as well as the spin state switching of spin crossover complexes, are presently of interest. However, in the case of labile Fe2+ complexes, it is challenging to induce dynamic transitions using supramolecular strategies. In the present work, highly organized structures made of glycyrrhetinic acid polyglycosides induced equilibrium between low and high spin states in an [Fe(TACN)2]2+ complex. Hybrids composed of these polyglycosides with this complex exhibited nanostructures such as nanosheets in addition to spin crossover phenomena and changes in oxidation state. Glycyrrhetinic acid polyglycoside derivatives also demonstrated an extremely low degree of change in spin crossover and resistance to oxidation state changes. The present technique of combining naturally occurring molecules with discrete coordination complexes is expected to allow the design of flexible, stimuli-responsive supramolecular coordination systems.
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