Seven new ionic liquids have been prepared which contain tetraarylphosphonium cations in which one of the aromatic groups is a quinoline ring. These compounds, which differ from each other in the point of attachment of the quinoline to the phosphorous core, were evaluated by DSC and TGA, then screened for thermal stability for 96 h at temperatures up to 300 °C. The observed thermal stabilities of the salts were found to be sensitive to the position of quinoline ring substitution, and correlated well with computed homolytic bond dissociation energies of the quinoline-P bonds.

中文翻译：

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带有喹啉环体系的基于四芳基phosph的中温离子液体的合成，热稳定性和计算的键解离能

已经制备了七种新的离子液体，它们含有四芳基phosph阳离子，其中的芳族基团之一是喹啉环。这些化合物在喹啉与磷核的连接点上互不相同，通过DSC和TGA进行评估，然后在高达300°C的温度下筛选96 h的热稳定性。发现所观察到的盐的热稳定性对喹啉环取代的位置敏感，并且与喹啉-P键的计算的均质键解离能很好地相关。