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提出了通过对样品进行邻位取代和间位取代以从实验上测定 自旋-内旋转弛豫速率的处理方法.在28—90℃的温度范围内测量了邻二甲苯和间二甲苯的甲基碳的T_1和NOE因子.分离得间二甲苯上甲基碳的自旋-内旋转弛豫速率和自旋-整体旋转弛豫速率,并计算得甲基的内旋转速率.
A method of experimentally determining the spin-inner rotational relaxation rate by ortho-substitution and meta-substitution of the samples is proposed.One of o-xylene and m-xylene is measured in the temperature range of 28-90 ° C The T_1 and NOE factors of carbon were used to separate the spin-internal relaxation relaxation rate and the spin-global relaxation rate of methyl carbon on m-xylene, and the internal rotation rate of methyl group was calculated.