Elastic deformability and luminescence of crystals of polyhalogenated platinum(ii)-bipyridine complexes

Single crystals showing elastic flexibility have attracted increasing attention as next-generation soft materials. Herein, we successfully developed a series of polyhalogenated platinum(ii)-bipyridine complexes showing solvent-of-crystallisation-dependent elastic flexibility. Notably, methanol-solvated crystals were the first examples of flexible crystals showing assembly-induced luminescence arising from the triplet metal-metal-to-ligand charge transfer ((MMLCT)-M-3) excited state. Furthermore, factors inducing elastic deformability based on the packing structures of the crystals were explored.

Automated summary

A series of polyhalogenated platinum(ii)-bipyridine complexes showing solvent-of-crystallisation-dependent elastic flexibility were successfully developed, with methanol-solvated crystals being the first examples of flexible crystals showing assembly-induced luminescence from (MMLCT)-M-3 excited state. Factors inducing elastic deformability based on the packing structures of the crystals were also explored.