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采用水溶法生长了NaClO3晶体(完成10个不同组别的100次结晶实验,每个组别循环次数均为1–10次),研究了NaClO3晶体手性对称破损,探讨了晶体成核和生长过程中手性对称破损的温度循环效应。实验结果表明:随着循环次数从1～10次的递增,该晶体的对映异构体过剩(crystal enantiomeric excess,CEE)从0.81增加到0.97。同时,每一组别中CEE的数值分布则从较宽范围的(0.47～1)改变为较窄范围的(0.92～1)。结晶温度的升–降反复循环,对于NaClO3晶体成核和生长过程中的手性对称破损起着非常重要的作用。此方法可应用于对映异构体的结晶提纯。
NaClO3 crystals were grown by water-soluble method (100 crystallization experiments in 10 different groups were completed, and the number of cycles was 1-10 in each group). The chiral symmetric damage of NaClO3 crystal was studied, and the crystal nucleation and growth The Temperature Cycling Effect of Chiral Symmetry Breakage in Process. The experimental results show that the crystal enantiomeric excess (CEE) increases from 0.81 to 0.97 with the number of cycles increasing from 1 to 10. At the same time, the numerical distribution of CEE in each group changed from a wider range (0.47-1) to a narrower range (0.92-1). The cycle of ascending-descending of the crystallization temperature plays a very important role in the chiral symmetrical breakage in the nucleation and growth of NaClO3 crystal. This method is applicable to the crystallization of enantiomers.