Previous Research Topics

Our research approach towards novel supramolecular and organic materials is based on three key elements: the concept of “inducing order through disorder”, the use of amide hydrogen bonding for the formation of well-defined one-dimensional aggregates, and utilization of chemical reactions in ordered phases to produce novel materials. We had previously used these concepts to produce multiple-helical π-conjugated polymers that undergo dynamic folding. Moreover, we had explored crystal engineering and chemical reactions in single-crystals. And in all of our research efforts, we establish new synthetic approaches for the efficient preparation of molecular precursors for organic materials.

Chemical reactions in single crystals often occur with perfect product selectivity. We employed this to prepare the first alternating polydiacetylene copolymers, and we observed an unusual dimerization of bromodiacetylenes that was the first complex, multistep reaction in a single crystal.

We prepared the first π-conjugated polymer that exhibited a multiple-helical “quaternary structure” of polymer chains that underwent partially reversible unfolding and refolding.

Carbon-rich organic compounds containing a series of conjugated triple bonds (oligoynes) are relevant synthetic targets.