Five new Keggin polyoxometalate (POM) salts were prepared with the tris(dihexylamino)cyclopropenium cation [C₃(NHex₂)₃]⁺ in an effort to investigate and understand the impact of combining triaminocyclopropenium (TAC) cations with POMs on their thermochemical and thermophysical properties. The tri-anions [PM₁₂O₄₀]^3– (M = Mo, W) have high melting salts (T_m = 140 and 129 °C, respectively), whereas the tetra-anions [PVMo₁₁O₄₀]^4– and [HPV₂M₁₀O₄₀]^4– (M = Mo, W), despite the increased electrostatic charge, have lower and very similar melting points (T_m ∼ 82 °C). The solid-state structures are all very similar, however, the tetra-anionic salts have a double layer of cations (compared to a single layer for the tri-anionic salts) and the electrostatic repulsion between these layers is likely responsible for the lower and similar melting points, as well as their increased solubility in non-polar solvents. The salts were also characterised by TGA, DSC, solubility studies, X-ray crystallography, NMR and infrared spectroscopy.

_{用三（二己基氨基）环丙烯铵阳离子 [C 3} (NHex ₂ ) ₃ ] ⁺制备了五种新的 Keggin 多金属氧酸盐 (POM) 盐，以研究和了解三氨基环丙烯铵 (TAC) 阳离子与 POM 结合对其热化学和热物理性质。三阴离子 [PM ₁₂ O ₄₀ ] ^3– (M = Mo, W) 具有高熔点盐（分别为T _m  = 140 和 129 °C），而四阴离子 [PVMo ₁₁ O ₄₀ ] ^4–和[HPV ₂ M ₁₀ O ₄₀ ] ^4–（M = Mo，W），尽管静电电荷增加，但具有较低且非常相似的熔点（T _m  ∼ 82 °C）。固态结构都非常相似，然而，四阴离子盐具有双层阳离子（与三阴离子盐的单层相比），这些层之间的静电排斥可能是造成较低和相似的熔点，以及它们在非极性溶剂中的溶解度增加。这些盐还通过 TGA、DSC、溶解度研究、X 射线晶体学、NMR 和红外光谱进行了表征。