A three-dimensional zincic molybdenum (V) phosphate with helical channel: Synthesis, structure, and electrochemical properties

A new reduced zincic molybdophosphate, (H2bpp)3[Zn3Mo12VO24(OH)6(H2O)2(HPO4)6(PO4)2]·2H2O 1 (bpp = 1,3-bis(4-pyridyl)propane) has been hydrothermally synthesized and characterized by elemental analysis, IR, TG, and single-crystal X-ray diffraction. Compound 1 crystallizes in the tetragonal space group I 41/a c d with a = 31.8033(4) Å, b = 31.8033(4) Å, c = 34.5593(8) Å, V = 34955.0(10) Å3, and Z = 16 and exhibits a 4,6-connected 3-D framework with (32.84)(34.42.83.95.10) topology. The basic building blocks of [Zn(2)(Mo6P4)2] are linked through [Zn(3)O6] octahedra and [Zn(1)O4] tetrahedra to construct 1-D chains along four different directions. Such 1-D chains are further connected by [Zn(1)O4]2+ linkers to form a 3-D intricate framework with helical channels occupied by protonated bpp and water molecules. Additionally, the electrochemical property of the 1-CPE has been studied in detail.