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在几种有机酸和硅溶胶的表面硅羟基作用时,测定了碳原子的自旋晶格弛豫时间,发现这些有机酸的pk_a越大,则和表面硅羟基的反应也越强
The spin lattice relaxation time of carbon atoms was measured at the surface silanol groups of several organic acids and silica sols. The larger the pk_a of these organic acids, the stronger the reaction with the surface silanols