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本文首先阐述了一些过渡金属配合物的摩擦学特性。根据配位化学的概念和有关配合物与金属表面间发生摩擦化学反应的假说,将所测试的有机金属配合物分成了3类。从摩擦学的要求来看,一些铌的硫代共价配合物显示了良好的摩擦学特性,可以与二硫化钼及石墨之类的固体润滑剂相比。然后,利用红外吸收光谱和核磁共振波谱分别直接地和间接地分析了这些铌的硫代化合物的摩擦化学反应。 红外光谱提供了所谓第三体(即润滑剂降解残留物)和转移膜分子结构的数据,核磁共振波谱给出了摩擦前原始分子的电离特性。转移膜的非腐蚀接枝与双核表面配合物的形成有关。依照Lewis酸碱规则,润滑剂的碱度是一个决定性的因素。
This article first describes the tribological properties of some transition metal complexes. According to the conception of coordination chemistry and the hypothesis of tribochemical reaction between metal complex and metal surface, the tested organometallic complexes are divided into three groups. From tribological requirements, some niobium-sulfur covalent complexes show good tribological properties comparable to solid lubricants such as molybdenum disulfide and graphite. Then, the tribochemical reactions of these niobium thio compounds were directly and indirectly analyzed by infrared absorption spectroscopy and nuclear magnetic resonance spectroscopy, respectively. Infrared spectroscopy provides data on the so-called third body (ie, lubricant degradation residue) and the molecular structure of the transfer membrane, which gives the ionization characteristics of the original molecules before rubbing. The non-corrosive grafting of the transfer film is related to the formation of the binuclear surface complex. According to Lewis acid-base rules, the alkalinity of lubricants is a decisive factor.