Microwave‐Assisted Synthesis and Crystal Structure of Molybdophosphate Supramolecular Compound with 2‐Aminopyridinium Cations

Abstract

Two supramolecular compounds, (C₅H₇N₂)₆[P₂Mo₅O₂₃] (1) and (C₅H₇N₂)₆[Mo₇O₂₄] · 3H₂O (2) have been synthesized by a simple, fast and efficient technique of microwave irradiation, and their crystal structure, spectroscopic properties have been studied. In 1, the geometry of polyanion [P₂Mo₅O₂₃]⁶⁻ can be described as a ring of five MoO₆ octahedra with two PO₄ tetrahedra capped on each side. The polyanions of 1 are connected to novel 1‐D zigzag chain structure and further extended to 3D supramolecular network through hydrogen bond contacts involving anions and cations and π‐π interactions between 2‐amionpyridinium cations. In 2, the [Mo₇O₂₄]⁶⁻ consists of seven distorted MoO₆ octahedra sharing edges and corners, resulting in the peculiar butterfly‐shaped configuration. The 2‐amionpyridinium cations form multipoint hydrogen bonds with [Mo₇O₂₄]⁶⁻ anions and connect the anions into an extended 1D chain.

Keywords:

• supramolecular compound
• molybdophosphate
• microwave irradiation
• crystal structure

This work is supported by Natural Science Foundation of Xuzhou Normal University (No. 05XLA08).