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ROYの新たなポリモルフと,解決した構造の共存するポリモルフの新たな記録
Shuang Chen1, Ilia A Guzei, Lian Yu
1University of Wisconsin-Madison, School of Pharmacy, Wisconsin 53705-2222, USA.
Journal of the American Chemical Society
|July 7, 2005
まとめ
5メチル-2-[(2-ニトロフェニル) アミノ]-3-チオフェン炭素ニトリル (ROY) の2つの新しいポリモルフが発見され,YT04は最も密度が高く,第二の安定したポリモルフである. これらの発見は,新しい固体形態を発見するための代替結晶化の経路を強調しています.
科学分野:
- 固体化学 固体化学
- クリスタログラフィーです.
- マテリアルサイエンス 材料科学
背景:
- 5-メチル-2-[(2-ニトロフェニル) アミノ]-3-チオフェン炭素ニトリル (ROY) は,室温で6つの有名なポリモルフを顕著に表しています.
- ROYはCambridge Structural Databaseのポリモルフィズムに関する主要なシステムである.
- 新しいポリモルフの発見は,材料の性質を理解し,アプリケーションを最適化するために不可欠です.
研究 の 目的:
- ROYの2つの新しいポリモルフ,Y04とYT04と指定されたものの発見と特徴を報告する.
- YT04ポリモルフの結晶構造を解明するために.
- ROYポリモルフの形状とそれらの物理的特性との関係を調査する.
主な方法:
- 室温で融解結晶化してY04を得ます.
- Y04の固体変換により,YT04を形成する.
- YT04の結晶構造を決定するための単結晶X線 difraktion.
主要な成果:
- 2つの新しいROYポリモルフ,Y04 (メタステーブル) とYT04が特定されました.
- YT04の結晶構造は解明され,25°Cで最も密度の高いポリモルフであることが明らかになった.
- YT04は,他の黄色いポリモルフと類似した形状を示し,オレンジと赤の形状とは異なる.
結論:
- Y04とYT04の発見は,ROY.の既知の多形景観を拡大する.
- YT04の高密度と安定性は,特定のアプリケーションの潜在的な利点を示唆しています.
- 溶剤ベースのスクリーニングを超えた代替結晶化方法は,Y04やYT04のような難解なポリモルフを発見するために不可欠です.
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