Composition space analysis of templated molybdates

摘要

A systematic investigation of the factors governing reaction product composition and three-dimensional structure was conducted in the MoO_3/H_2N(CH_2)_nNH_2/H_2O (n = 3-7) systems. Composition space analysis was performed through approximately 30 reactions using each amine under mild hydrothermal conditions. Ten new compounds were synthesized, of which single crystals of nine were grown. Five different molybdate structures were observed in these ten compounds, including beta-[Mo_8O_(26)]~(4-) molecular anions, two distinct [Mo_3O_(10)]_n~(2m-) chain poly-morphs, [Mo_8O_(26)]_n~(4n-) chains and [Mo_5O_(16)]_n~(2n-) layers. The relative phase stabilities of the reaction products and associated molybdate architectures are dependent upon the concentrations of each reactant in solution.