Low-dimensional non-toxic A 3 Bi 2 X 9 compounds synthesized by a dry mechanochemical route with tunable visible photoluminescence at room temperature

We have synthesized fifteen inorganic and hybrid organic–inorganic non-toxic A 3 Bi 2 X 9 compounds (A = K + , Rb + , Cs + , CH 3 NH 3 + and HC(NH 2 ) 2 + ; X = I − , Br − , Cl − ) through dry mechanochemistry.