H NMR spectroscopy. Diamagnetic Zn(II) analogues are also prepared as reference systems to elucidate the electronic behavior of the iron(II) grids. These results establish a family of metallosupramolecular iron(II) grid architectures exhibiting multistimuli-responsive spin-state switching and highlight how proton-coupled ligand-field modulation within a supramolecular framework can regulate bistable magnetic behavior. This work provides new insight into the design of chemically addressable spin-state switchable supramolecular systems for responsive molecular materials.
Sarkar et al. (Wed,) studied this question.