Polymorphic Control of Glycine Crystals by LLIP Methodunder High Magnetic Field Ⅲ

摘要

Control of crystal system is important because the physical and chemical properties depend onthe polymorph. We reported the magnetic field effects on polymorphism for glycine crystal by usingliquid-liquid interfacial precipitation (LLIP) method under the influence of high magnetic fields[1-3]. InLLIP method, the degree of supersaturation increases from the bottom to the interface. The solventmediated polymorphic transformation (SMPT) is occurred among polymorphs depended on the degree ofsupersaturation. Therefore, the ratio of polymorphism is influenced by staying time and the position. Highmagnetic field gives the well-known mechanical forces, namely, the magnetic torque, magnetic force, andLorentz force. We expected these three forces are available to determine the polymorphism by control thestaying time at the interface and growth layer where are hard position to SMPT. In this study, the magneticfield effects were investigated for polymorphism of glycine crystal made by LLIP method under verticalmagnetic fields with various gradients to be reduced gravity environment.