Separation and nucleation control of α and β polymorphs of L: -glutamic acid by swift cooling crystallization process.
Separation of crystal nucleation of the two known polymorphs of L: -glutamic acid, the metastable α and the stable β, from pure aqueous solution is attained by following a swift cooling crystallization process. Results elucidate a clear distinction of the preferred nucleation regions of α, β and combinations of α and β in the temperature range between 1 and 40°C. Also, the type of nucleation is supersaturation dependent: higher supersaturation favours α and lower supersaturation favours β. Morphology and structure of the polymorphs confirm their form of crystallization.
Srinivasan
K
K
Crystal Growth Laboratory, Department of Physics, School of Physical Sciences, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India. nivas_5@yahoo.com
Dhanasekaran
P
P
D003080:Cold Temperature; D003460:Crystallization; D018698:Glutamic Acid / Q000737:chemistry*; D012996:Solutions; D014867:Water; D014961:X-Ray Diffraction
D012996:Solutions; D014867:Water; D018698:Glutamic Acid