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电子顺磁共振(EPR)又叫做电子自旋共振(ESR),是近二、三十年才迅速发展起来的一门新兴学科。它是利用具有未成对电子的物质在静磁场作用下对电磁波的共振吸收特性来进行分析的技术。这一研究手段具有深入物质内部,进行细致分析而不破坏样品;对化学反应过程无影响;灵敏度高和信息丰富等优点。目前已广泛地应用于物理、化学、生物学、医学以及各种材料科学领域。EPR 技术仅适用于含有未成对电子的物质,EPR 手段却能更多地研究那些以微量杂质、吸附中心、活性中心、缺陷、色心及自由基等微量顺磁中心的形式,广泛地散布在反磁性材料中的体系,即使在样品中不含有不成对电子,也可采用人工的方法在材料中形成不成对电子,然后用EPR 技术加以研究。例如吸
Electron paramagnetic resonance (EPR), also called electron spin resonance (ESR), is a new discipline that has developed rapidly in the last two or three decades. It is the use of unpaired electrons in the material under the action of static magnetic field of the resonant absorption characteristics of electromagnetic analysis. This means of research has in-depth material, careful analysis without destroying the sample; no impact on the chemical reaction process; high sensitivity and information-rich advantages. Has been widely used in physics, chemistry, biology, medicine and a variety of materials science. The EPR technique is only suitable for materials containing unpaired electrons. The EPR method can study more about the trace paramagnetic centers such as trace impurities, adsorption centers, active centers, defects, color centers and free radicals, Systems in diamagnetic materials can be artificially formed into unpaired electrons in the material, even if they do not contain unpaired electrons in the sample, and then studied by EPR techniques. For example, suck