A simple model is proposed that semi-quantitatively explains the dependence of the EPR signal intensity of adsorbed NO molecules on the adsorption value. It is assumed that there are only two types of NO adsorption sites on each facet of the microcrystal, such that only NO molecules adsorbed on one of them are active in EPR. Within the framework of this model of lattice adsorption, it is assumed that there are Z other adsorption centers from the set under consideration that are available for the adsorption of neighboring NO molecules in the local environment of each EPR-active adsorption center. In this case, the formation of diamagnetic (NO)₂ dimers containing an NO molecule adsorbed on a center active in the EPR decreases the integral intensity of the EPR signal. Analytical expressions are obtained for the dependence of the EPR signal intensity on the surface coverage. They were used to analyze experimental data on the adsorption of NO at the Lewis acid sites of sulfated zirconia. The proposed model consistently explains the results of EPR experiments.

提出了一个简单的模型，该模型半定量地解释了被吸附的NO分子的EPR信号强度对吸附值的依赖性。假设在微晶的每个面上仅存在两种类型的NO吸附位，因此只有吸附在其中一个上的NO分子才在EPR中具有活性。在此晶格吸附模型的框架内，假设正在考虑的集合中还有Z个其他吸附中心，可用于在每个EPR活性吸附中心的局部环境中吸附相邻的NO分子。在这种情况下，形成反磁性（NO）₂包含吸附在EPR活性中心上的NO分子的二聚体会降低EPR信号的积分强度。获得关于EPR信号强度与表面覆盖率的依赖性的解析表达式。他们被用来分析实验数据的NO吸附在硫酸化氧化锆的路易斯酸位。所提出的模型始终如一地解释了EPR实验的结果。