The Role of Solvent Composition and Polymorph Surface Chemistry in the Solution-Mediated Phase Transformation Process of Cefaclor

被引：12

作者：

Wang, Chang ^{[1
]}

Zhou, Ling ^{[1
]}

Zhang, Xia ^{[1
]}

Yang, Yongfan ^{[1
]}

Yin, Qiuxiang ^{[1
,2
]}

Roberts, Kevin J. ^{[3
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Chem Engn, Tianjin 300072, Peoples R China

[3] Univ Leeds, Ctr Digital Design Drug Prod, Sch Chem & Proc Engn, Leeds LS2 9JT, W Yorkshire, England

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2018年 / 57卷 / 49期

关键词：

L-GLUTAMIC ACID; FORM II; NUCLEATION; BETA; CRYSTALLIZATION; MECHANISM; CARBAMAZEPINE; MONOHYDRATE; DISSOLUTION; MORPHOLOGY;

D O I：

10.1021/acs.iecr.8b04462

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The solution-mediated phase transformation process from cefaclor dihydrate to an ethanol-water solvate is analyzed by optical microscopy, powder X-ray diffraction, scanning electron microscopy and molecular modeling. The solution concentration and polymorphic composition during slurry transformation, as monitored using UV and Raman spectroscopy, respectively, reveal that the dihydrate transforms to the ethanol-water solvate at a low ethanol concentration in the mixture solvent. The transformation process is controlled by the growth of ethanol water solvate, which nucleates on the surfaces of the dihydrate crystals. Molecular simulation confirms the critical point of transformation between the dihydrate and the ethanol-water solvate, consistent with the experimental results. The results demonstrate the importance of the solvent composition and surface chemistry of dihydrate in promoting the heterogeneous nucleation of ethanol-water solvate and provide guidance for the process control for the target form of cefaclor required.

引用

页码：16925 / 16933

页数：9

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