Abstract-Raman and Terahertz Spectroscopic Investigation of Cocrystal Formation Involving Antibiotic Nitrofurantoin Drug and Coformer 4-aminobenzoic Acid

Yong Du ^1,* ,Qiang Cai ¹

,Jiadan Xue ²

 andQi Zhang ¹

¹

Centre for THz Research, China Jiliang University, Hangzhou 310018, China

²

Department of Chemisty, Zhejiang Sci-Tech University, Hangzhou 310018, China

^*

Author to whom correspondence should be addressed.

Academic Editor: Srinivasulu Aitipamula

http://www.mdpi.com/2073-4352/6/12/164

Cocrystallization could improve most physicochemical properties of specific active pharmaceutical ingredients, which has great potential in pharmaceutical development. In this study, the cocrystal of nitrofurantoin and 4-aminobenzoic acid was prepared with solid-state (solvent-free or green-chemistry) grinding approach, and the above cocrystal has been characterized by Raman and terahertz vibrational spectroscopic techniques. Spectral results show that the vibrational modes of the cocrystal within the whole spectral region are different from those of the corresponding parent materials. The dynamic process of such pharmaceutical cocrystal formation has also been monitored directly with Raman spectra. These results offer us unique means for characterizing the cocrystal conformation from the molecule-level, and provides us with rich information about the reaction dynamic of cocrystal formation within pharmaceutical fields. View Full-Text