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ポリモルフィズム 鏡 分子液体の液体対液体変換におけるポリモルフィズム
Finlay Walton1, John Bolling1, Andrew Farrell1
1School of Chemistry, University of Glasgow, Glasgow G12 8QQ, U.K.
Journal of the American Chemical Society
|April 7, 2020
まとめ
液体から液体への移行は,2つの液体状態の間の変化を含みます. この研究は これらの移行が 結晶の形を反映した 競合する構造と結びついていることを明らかにし 液体の振る舞いに新しい洞察を与えています
科学分野:
- 物理化学
- 材料科学
- 凝縮物質物理学
背景:
- シングルコンポーネントの液体における液体-液体トランジション (LLT) は論争の的であり,しばしば超冷却状態で観察される.
- LLTはガラス化と局所的に好ましい構造に関連していますが,順序のパラメータは不明です.
- 局所的な分子包装を理解することは,LLTの解明に不可欠です.
研究 の 目的:
- 分子液体における LLT の根本的な原因を調査する.
- 順序のパラメータを指定します.
- LLT,ポリモルフィズム,およびポリモルフィズムとの関係を調べる.
主な方法:
- トリフェニルフォスフィートの液体-液体移行の実験調査.
- 局所的な分子パッキングと構造的な競争の分析
- 液体とガラスの相を区別する.
主要な成果:
- トリフェニルフォスフィートのLLTは,2つの結晶ポリモルフを模倣する競合する液体構造から生じる.
- 移行は幾何学的に挫折した液体と動的に挫折したガラスの間に起こります.
- 証拠は,結晶的多形性と液体多形性の間の一般的なリンクを示唆しています.
結論:
- LLTは,結晶の多形性に関連した構造的な競争によって駆動されます.
- この発見は,LLTの物理的基礎を明らかにし,新しい例を発見するのに役立ちます.
- この研究は,液体における無形相の振る舞いの理解を進める.
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