Coordination Chemistry
In our research group, we are studying on the synthesis of novel transition metal and lanthanoid complexes with unique molecular and crystal structures, which are expected to exhibit useful magnetic and optical properties and highly selective reactivity. In particular, we are challenging to synthesize manganese model clusters for the oxygen-evolving center in photosystem-II, metal complexes that exhibit stimuli-responsible spin-crossover or chromotropic behavior, and to elucidate the mechanism of absolute spontaneous resolution, which selectively generates optically active compounds from non-chiral sources.
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The origin of chirality in nature is one of the important unexplored issues. We have found that certain trinuclear complexes consisting of transition metal and lanthanoid ions surrounded by tripodal organic molecules deposit only enantiomorphic crystals consist of a specific enantiomer of the possible pair in every crystallization. That is, the chirality is spontaneously created from the non-chiral chemical species.