The synthesis and structure of a chiral 1D aluminophosphate chain compound: d-Co(en)3[AlP2O8]·6.5H2O

A new chiral one-dimensional (1D) aluminophosphate chain compound [d-Co(en)3][AlP2O8]·6.5H2O (designated AlPO-CJ22) has been hydrothermally synthesized by using the optically pure d-Co(en)3I3 complex as the template. Single-crystal structural analysis reveals that its structure is built up from alternating connection of AlO4 and PO2(=O2) tetrahedra to form corner-shared Al2P2 four-membered ring (4-MR) chains. The d-Co(en)33+ complex cations extended along the 21 screw axis interact with the inorganic chains through hydrogen-bonds of N⋯O atoms in a helical fashion. Optical rotation measurement shows that AlPO-CJ22 is chiral as with d-Co(en)33+ complex cations. Crystal data: orthorhombic, I212121, a=8.5573(8)Å, b=22.613(2)Å, c=22.605(2)Å, Z=8Z=8, R1=0.067R1=0.067, wR2=0.1291wR2=0.1291, and Flack parameter: −0.02(3). CCDC number: 254179.

Graphical AbstractThe structure is built up from alternating connection of AlO4 and PO2(=O2) tetrahedra to form corner-shared Al2P2 four-membered ring (4-MR) chains. The d-Co(en)33+ complex cations extended along the 21 screw axis interact with the inorganic chains through hydrogen-bonds of N⋯O atoms in a helical fashion.Figure optionsDownload as PowerPoint slide