1,3-ディアザアズレンの骨格を持つ棒のような分子によって形成された新しい双軸スメクティック液晶相である
Akira Mori1, Masahiro Yokoo, Masashi Hashimoto
1Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan. mori-a@cm.kyushu-u.ac.jp
Journal of the American Chemical Society
|May 29, 2003
まとめ
1,3-ディアザアズーレンを含む新型液晶 (LC) 材料は,新しい二軸スメクティック相を示しています. これらの材料は,制限された分子回転と柱状集積により,有機電子の潜在能力を示しています.
科学分野:
- 材料科学 材料科学とは
- 有機化学 オーガニック・ケミストリー
- 凝縮物質物理学 凝縮物質物理学
背景:
- 液晶 (LC) 材料は,ディスプレイ技術と高度な材料にとって極めて重要です.
- 非ベンゼノイドアロマティックシステムは,ユニークな電子的および構造的特性を提供します.
- パーソナライズされた特性を持つ新しいLCフェーズの開発は,現在進行中の研究分野です.
研究 の 目的:
- 1,3-ディアザアズーレン単位を組み込んだ新しい棒状液晶 (LC) 材料を合成し,特徴づけること.
- これらの新しいLC材料のメソフェーズ行動と構造的特性を調査する.
- オーガニック・エレクトロニクスと光伝導における潜在的な応用を探求する.
主な方法:
- 新しい棒状の液晶材料の合成.
- ポーラライジング顕微鏡を用いて,相識別と特徴づけを行う.
- 熱分析のための微分スキャニング熱計 (DSC).
- 構造的決定のための指向したサンプルのX線 difraktion (XRD).
主要な成果:
- 1,3-diazaazuleneコアを特徴とする棒のようなLC材料の成功合成.
- 従来のSmCフェーズと新しい双軸スメクティックLCフェーズの観察.
- 小説段階では,長い軸の周りの分子回転が制限されている.
- アロマティックユニットの対面的な相互作用は,層に組織された柱状の集積物を導きます.
- メソフェスは,円盤状の分子によって形成されるものと類似した,ラメラー柱状のフェーズとして識別されます.
結論:
- 合成された1,3-ディアザアズレンベースのLC材料は,新しい双軸スメクティック相を含むユニークなメソフェーズ行動を示しています.
- 制限された分子回転と柱状集積は,観測された相の重要な特徴です.
- これらの材料は,有機半導体や光伝導における応用に有望である.
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