Two new bimetallic phosphates assembled from the 4-ring building units and influence of metal on the phase selectivity

Two new bimetallic phosphates [(CH3)2NH]0.5[Zn0.62Co0.38PO3OH] (ZnCoPO-CJ48) and [(CH3)2NH2][Zn2.3Mn0.7(PO4)2(PO3OH)]·H3O (ZnMnPO-CJ49) have been solvothermally synthesized in the similar reaction system. ZnCoPO-CJ48 is a layered zinco-cobalt phosphate with neutral framework, its structure is constructed by the connection of Zn(Co)O4 and PO3OH tetrahedra forming a novel 2-D sheet with 3- and 4-rings. The alternating connection of Zn(Mn)O4 and PO4/PO3OH tetrahedra results in the open framework of ZnMnPO-CJ49 with 16-ring extra-large channels. Notably, both compounds are featured by the 4-ring building units T2P2O6(OH)2 formed by the connection of two TO4 tetrahedra and two PO3OH tetrahedra. The 3-D structure of ZnMnPO-CJ49 can be viewed as the connection of zinc–manganese phosphate layers analogous to the layered structure of ZnCoPO-CJ48 by the 1-D edge-sharing 4-ring chains as the pillars. In this work, the synthetic conditions of these two compounds and the influence of metal on the phase selectivity have been discussed in detail.

Two new bimetal phosphates assembled from the 4-ring building units have been synthesized in the similar reaction system only through changing the metal sources. The influence of metal on the phase selectivity has been discussed.Figure optionsDownload as PowerPoint slideResearch highlights
► Two new bimetal phosphates are assembled from the 4-ring building units built up from the connection of two TO4 tetrahedra and two PO3OH tetrahedra.
► The metal sources influence the phase selectivity.
► 3-D structure of ZnMnPO-CJ49 can be viewed as the connection of layered structure of ZnCoPO-CJ48 by the edge-sharing 4-ring chains as the pillars.