论文部分内容阅读
测定了小檗碱及其盐类的~1HNMR 谱,观察了在 DMSO—d_6溶剂中D_2O 对溶剂极化屏蔽效应的影响.结果发现。成盐效应和 D_2O 交换均使距分子偶级矩较近的质子化学位移向高场移动.
1HNMR spectra of berberine and its salts were measured and the effect of D_2O on the polarization shielding effect of solvent in DMSO-d_6 solvent was observed. Both the salt-forming effect and the D 2 O exchange move the proton chemical shifts closer to the even moment of the molecule toward the high field.