Polymorphic Ammonium Salts of the Antibiotic 4-Aminosalicylic Acid
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https://figshare.com/articles/dataset/Polymorphic_Ammonium_Salts_of_the_Antibiotic_4_Aminosalicylic_Acid/2516023
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资源简介：
Reaction of the antibiotic 4-aminosalicylic acid with
ammonia yields
three polymorphic forms of the ammonium 4-aminosalicylate salt [NH4][C6H3NH2OH(COO)]. When the
reaction is conducted in solution, the three polymorphs are obtained
concomitantly, while liquid-assisted grinding and solid–gas
reaction result in the formation of pure Form II. The three polymorphs
are characterized by different patterns of hydrogen bonding interactions
between the structurally rigid anions and the ammonium cations. Solid
products were characterized by single-crystal and powder X-ray diffraction,
variable temperature powder diffraction, calorimetric techniques (DSC
and TGA), and hot-stage microscopy (HSM).
创建时间：
2012-06-06
