Hydrogen-bond-mediated structural variation of metal guanidinium formate hybrid perovskites under pressure.

ABSTRACT: The hybrid perovskites are coordination frameworks with the same topology as the inorganic perovskites, but with properties driven by different chemistry, including host-framework hydrogen bonding. Like the inorganic perovskites, these materials exhibit many different phases, including structures with potentially exploitable functionality. However, their phase transformations under pressure are more complex and less well understood. We have studied the structures of manganese and cobalt guanidinium formate under pressure using single-crystal X-ray and powder neutron diffraction. Under pressure, these materials transform to a rhombohedral phase isostructural to cadmium guanidinium formate. This transformation accommodates the reduced cell volume while preserving the perovskite topology of t

SUBMITTER: Yang Z 

PROVIDER: S-EPMC6562345 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature