“…Generally, PINFs can be classified according to the types of the inorganic component and the organic component [ 2 , 6 , 7 ]. A series of inorganic phosphate, such as zinc [ 7 , 8 ], copper [ 9 , 10 ], calcium [ 11 , 12 ], manganese [ 13 , 14 ] and cobalt [ 15 , 16 ] phosphate, have been employed to construct PINFs. Additionally, several organic biological macromolecules, including enzymes [ 17 , 18 ], proteins [ 19 , 20 ] and nucleic acids [ 21 , 22 ], have been reported for the synthesis of PINFs.…”