A solution mediated transformation between two co-crystal phases has been observed for the p-toluensulfonamide–triphenylphosphine oxide co-crystal system. This system has two known co-crystals with 1 : 1 and 3 : 2 stoichiometry respectively, and the ternary phase diagram (TPD) for the system has been determined in acetonitrile previously. By manipulating the solution composition in this solvent to a region of the TPD where the 1 : 1 co-crystal is stable, the 3 : 2 co-crystal could be observed to convert to the 1 : 1 co-crystal. The corresponding transformation was true for the 1 : 1 co-crystal in a region of the TPD where the 3 : 2 co-crystal is stable; the 1 : 1 co-crystal converted to the 3 : 2 co-crystal.
在对
甲苯磺酰胺-
三苯基膦氧化物共晶体系中,观察到了溶液介导的两种共晶相之间的转变。该体系有两种已知的共晶体,其配比分别为 1 :之前已经在
乙腈中测定了该体系的三元相图(
TPD)。通过调节该溶剂中的溶液成分,使 1 :1 共晶体稳定的区域,可以观察到 3 : 2 共晶体转化为 1 :1 共晶体。在 1 : 1 共晶体稳定的
TPD 区域,可以观察到 3 : 2 共晶体转化为 1 : 1 共晶体:在 3 : 2 共晶体稳定的
TPD 区域,1 : 1 共晶体也发生了相应的转变;1 :1 : 1 共晶体转化为 3 : 2 共晶体。