The lubricating performance of trihexyl(tetradecyl)phosphonium bisoxalatoorthoborate (P-BOB) ionic liquid is analysed at 80 °C and 140 °C, and compared to an ionic liquid containing a partially hydrated version of the anion. The reduction of the anions produces oxalate complexes that contribute synergistically to lower friction. The role of oxalate in enhancing lubricity was indicated by the fact that the partially hydrated anion is a precursor orthoborate anion complexed with oxalic acid. It consequently showed the lowest friction at 80 °C. Upon heating, the precursor was converted into [BOB]⁻ and displayed the same friction at 140 °C as the fully synthesised species. The mechanisms of the breakdown of the [BOB]⁻ anion and formation of the tribofilm are elucidated.

在80°C和140°C下分析了双草酸原硼酸三己基（十四烷基）phosph（P-BOB）离子液体的润滑性能，并将其与含有部分水合阴离子的离子液体进行了比较。阴离子的还原产生草酸盐配合物，其协同作用有助于降低摩擦。草酸在增强润滑性中的作用通过以下事实表明：部分水合的阴离子是与草酸络合的前体原硼酸根阴离子。因此，它在80°C时表现出最低的摩擦。加热后，前体转化为[BOB] ^-并在140°C时表现出与完全合成的物质相同的摩擦力。阐明了[BOB] ^-阴离子的分解机理和摩擦膜的形成机理。