分子結晶の固体溶液硬化:オメプラゾールのタウトメリックポリモルフ
Manish Kumar Mishra1, Upadrasta Ramamurty, Gautam R Desiraju
1Solid State and Structural Chemistry Unit, Indian Institute of Science , Bangalore 560 012, India.
Journal of the American Chemical Society
|January 31, 2015
まとめ
この研究は,医薬品のような有機固体の硬さを設計する方法を示しています. オメプラゾールポリモルフの固体溶液を作成することによって,研究者は製造のための材料の硬さを改善するために格子抵抗性を増加させました.
科学分野:
- マテリアルサイエンス 材料科学
- 医薬品科学 医薬品科学とは
- 固体化学 固体化学
背景:
- 固体の硬さは,製薬製造プロセスにおいて極めて重要です.
- 固体状態の性質を制御することは,薬物開発と生産に不可欠です.
- オメプラゾルのポリモルフは,異なるタウトメア比率を示し,固体状態の振る舞いに影響を与えます.
研究 の 目的:
- 固体溶液の形成と有機固体の機械的特性 (硬さ) の関係を調査する.
- 医薬品材料の硬さを工学的に強化するために固体溶液強化の適用を実証する.
- 異なるタウトメア比率がオメプラゾールポリモルフのプラスチックの変形と硬さにどのように影響するかを理解する.
主な方法:
- ナノインデンテーションの研究は,オメプラゾールポリモルフのシリーズで実施されました.
- 固体溶液中の5および6メトキシタウトマーの比率の体系的な変化.
- プラスチックの変形時にシアスライディングに対する格子抵抗の分析.
主要な成果:
- 固体溶液強化は,有機固体の硬さを設計するために効果的に使用されました.
- 切断スライディングに対する格子抵抗の増大は,より高い材料硬さと直接相関しています.
- オメプラゾールタウトメアの比率は,観察された固体強化効果に影響を与えた.
結論:
- 固体溶液形成は,製薬固体の硬さを調整するための実行可能な戦略です.
- 分子層の滑り方と格子抵抗を理解することは,プラスチック変形と硬さを制御する鍵です.
- このアプローチは,分子固体の製造プロセスを,その機械的性質に基づいて最適化するための経路を提供します.
関連する概念動画
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
888
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
888
Polymer Classification: Crystallinity
4.3K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
4.3K
Molecular and Ionic Solids
21.1K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
21.1K
Recrystallization: Solid–Solution Equilibria
4.8K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
4.8K
Crystal Field Theory - Octahedral Complexes
32.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
32.2K
Crystal Growth: Principles of Crystallization
6.1K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
6.1K


