An efficient way for the synthesis of covalent Strandberg‑typephosphomolybdate compound H_6P_2Mo_5O_(23)

摘要

A covalent Strandberg-type phosphomolybdate H_6P_2Mo_5O_(23)(EPM) was synthesized by applied ethanediamine (en) asa template agent. Besides, the pH value and Mn2+were also the important factors in composing EPM. The structure ofEPM was characterized by elemental analyses, X-ray powder diffraction, X-ray photoelectron spectra, IR spectrum, andsingle-crystal X-ray diffraction. Structural analysis shows that EPM consists a H_6P_2Mo_5O_(23)cluster and two en moleculesas lattice fillers. As a case of molybdenum oxide, EPM exhibits thermal instability even under low temperature conditions,which is more similar to covalent compound than ionic compound.Graphic abstract A thermo-unstable covalent Strandberg-type precursor was successfully synthesized, and the synthesismethod was innovative, involving pH value, catalyst and template synthesis, which provided good synthesis experiencefor future experiments.