pH-dependent assembly of 1D–2D structures based on both {V10O28} and [NiMo6O24H6]4  units: Synthesis, structure and magnetic properties

https://doi.org/10.1016/j.inoche.2013.04.026Get rights and content

Highlights

  • Both {V10O28} units and {NiMo6O24H6} coexist in one compound.

  • The self-assembly process of each compound is pH-dependent.

  • The {V10O28} and {NiMo6O24H6} were linked to form the 1D and 2D structures.

  • Synthesis of these two complexes by the mild ‘one pot’ aqueous solution method.

Abstract

Two novel complexes [H2N(CH2CH2)2O]4[Na(H2O)2{O(CH2CH2)2NH2}]2[Na(H2O)4]2[V10O28][NiMo6O24H6]·8H2O (1) and [H2N(CH2CH2)2O]6[Na(H2O)3]2[V10O28H2][NiMo6O24H6]·4H2O (2) containing both isopolyvanadate {V10O28} and [NiMo6O24H6]4  units have been synthesized and structurally characterized for the first time, showing that the pH value of the reaction plays a key role in structure control of self-assembled processes. Compound 1 exhibits a novel one-dimensional (1-D) chain-like structure consisting of Anderson-type [NiMo6O24H6]4  and isopolyvanadate [V10O28]6  anions linked by Na+ ions. In compound 2 with the lower pH value, [NiMo6O24H6]4  and [V10O28H2]4  anions are bridged by [Na2O10] units to form the 2D extended layer. The magnetic properties of 1 and 2 are presented.

Graphical abstract

Two novel complexes consisting of both {V10O28} and [NiMo6O24H6]4  units arise from a pH-dependent self-assembly process, in which both {V10O28} and [NiMo6O24H6]4  anions could be bridged by Na+ ions to form the 1D chain-like and 2D layer structures under lower pH value.

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Acknowledgment

The authors are thankful for the financial support from the Natural Science Foundation of China (Grant Nos. 21001021 and 21273031) and from the Department of Science and Technology of Jilin Province (201201105).

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