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当两个或两个以上的具有不同电负性的原子化合时,它们将自动调整各自的电负性,直至各原子的电负性趋于相等,这就是Sanderson电负性均衡原理。事实证明,化合物尤其是分子筛的Sanderson电负性与它的诸多性质有关。介绍了Sanderson电负性及其均衡原理,综述了Sanderson电负性均衡原理在分子筛研究中的应用。分子筛的Sanderson电负性与有机分子在分子筛上的脱附活化能、与分子筛中羟基的伸缩振动频率、与由碱金属交换的分子筛-碘的可见吸收谱、与分子筛的酸度等均呈现良好的线性关系,Sanderson电负性作为一种简单、直观的手段,可以很好地解释一些化合物尤其是分子筛的物化性质,为研究分子筛的结构与性能的关系提供了有益的途径。在研究工作中,要根据研究对象选择合适的表征方法,切不可牵强附会。
When two or more atoms with different electronegativities are combined, they will automatically adjust their respective electronegativities until the electronegativities of the atoms tend to be equal, which is the Sanderson electronegativity equalization principle. It has been proved that the Sanderson electronegativity of compounds, especially molecular sieves, is related to many of its properties. The electronegativity of Sanderson and its principle of equilibrium are introduced, and the application of Sanderson electronegativity equalization principle in molecular sieve research is reviewed. The electrocatalytic activity of Sanderson electronegativity of zeolites, the desorption activation energy of organic molecules on zeolites, the stretching vibration frequency of hydroxyl groups in zeolites, the visible absorption spectra of molecular sieves-iodine exchanged with alkali metals, the acidity of zeolites, etc. As a simple and intuitive method, Sanderson electronegativity can explain the physicochemical properties of some compounds, especially molecular sieves, and provide a useful way to study the relationship between structure and properties of molecular sieves. In the research work, according to the research object to choose the appropriate method of representation, must not be forced annex.