在脱水过程中探索卡巴马西平的固态景观:低频拉曼光谱视角
Peter Iii J G Remoto1, Kārlis Bērziņš1, Sara J Fraser-Miller1
1The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Chemistry, University of Otago, Dunedin 9016, New Zealand.
Pharmaceutics
|May 27, 2023
概括
低频拉曼光谱有效监测了卡巴马西脱水,识别了固态形式的IV转化. 这种技术提供了增强的制药过程控制和监控能力.
科学领域:
- 固态化学 固态化学
- 制药科学 制药科学
- 频谱学是一种光谱学.
背景情况:
- 卡巴马泽平是一种广泛使用的抗药物,具有各种固态形式.
- 了解药物加工过程中的固态转换对于制药质量控制至关重要.
- 拉曼光谱是一种有价值的工具,用于表征药物多态.
研究的目的:
- 在脱水过程中调查卡巴马西平的固态景观.
- 探索低频拉曼光谱对于监测相变的有用性.
- 为了比较低频和中频拉曼光谱在跟踪碳胺脱水中的有效性.
主要方法:
- 拉曼光谱技术在低 (-300~300厘米) 和中 (300~1800厘米) 频率区域均被采用.
- 用周期边界条件的密度函数理论 (DFT) 用于光谱表征.
- 主要成分分析 (PCA) 和多变量曲线分辨率 (MCR) 分析了脱水路径.
主要成果:
- 实验拉曼光谱与DFT计算显示出很好的一致性 (平均平均偏差<10cm-1).
- 在40至60°C的温度下研究了卡巴马西平二水合物的脱水.
- 低频拉曼光谱成功检测出卡巴马西平IV形式的短暂形成和消失,优于中频分析.
结论:
- 低频拉曼光谱为卡巴马泽脱水过程中的快速固态转换提供了独特的见解.
- 该技术显示了实时监控和控制制药过程的巨大潜力.
- 这项研究强调了低频和中频拉曼光谱对于全面的固态分析的互补性.
相关概念视频
01:20Raman Spectroscopy: Overview
480
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
480
01:26Raman Spectroscopy Instrumentation: Overview
470
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
470
01:26Spectroscopy of Carboxylic Acid Derivatives
2.5K
Infrared spectroscopy is primarily used to determine the types of bonds and functional groups. In carboxylic acid derivatives, a typical carbonyl bond absorption is observed around 1650–1850 cm−1. For esters, the absorption is recorded at around 1740 cm−1, while acid halides show the absorption at about 1800 cm−1. Another acid derivative, the acid anhydrides, exhibit two carbonyl absorption around 1760 cm−1 and 1820 cm−1, arising from the symmetrical and...
2.5K