Investigation of Glycine Polymorphic Transformation by In Situ ATR-FTIR and FT-Raman Spectroscopy

被引：6

作者：

Li, Zunhua ^{[1
]}

Zhang, Bowen ^{[2
]}

机构：

[1] Hunan Univ Sci & Engn, Coll Chem & Bioengn, Yongzhou 425199, Peoples R China

[2] Kyung Hee Univ, Dept Chem Engn, Yongin 17104, South Korea

来源：

CRYSTALS | 2022年 / 12卷 / 08期

关键词：

phase transformation; glycine; in situ ATR-FTIR; FT-Raman spectroscopy; THERMODYNAMIC ASPECTS; PHASE-TRANSFORMATION; CRYSTAL-STRUCTURE; GAMMA-GLYCINE; CRYSTALLIZATION; NUCLEATION; STABILITY; SYSTEMS; IMPACT;

D O I：

10.3390/cryst12081141

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The solution-mediated phase transformation of alpha-form to gamma-form glycine, including dissolution of metastable alpha-form, nucleation, and growth of stable gamma-form during polymorphic transformation, was investigated using in situ attenuated total-reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and Fourier transform Raman spectroscopy (FT-Raman). The mechanistic influence of operating parameters such as agitation speed, crystallization temperature, alpha-form seed concentration, and NaCl concentration on polymorphic phase transformation was examined. When the agitation speed, crystallization temperature, and NaCl concentration were increased, the polymorphic transformation process was improved due to the promotion of nucleation and growth of stable gamma-form, in addition to the promotion of dissolution of metastable alpha-form. Moreover, the time to induce gamma-form nucleation and complete conversion of alpha-form to gamma-form was also reduced with increasing alpha-form seed concentration.

引用

页数：10

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