フォトトリガーによる水素結合ロゼットの自己組み立て
Shiki Yagai1, Toshiharu Nakajima, Takashi Karatsu
1Contribution from the Department of Materials Technology, Faculty of Engineering, and Department of Physics, Faculty of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
Journal of the American Chemical Society
|September 16, 2004
まとめ
研究者らは,アゾベンゼン付メラミン (M2) とバービチューラート (B2) を使って光反応性超分子組成を開発した. 光は,安定したサイクルヘクサマーロゼットの形成を誘発し,先進的な材料の制御可能な自己組み立てを実証します.
科学分野:
- 超分子化学 超分子化学
- 有機化学 オーガニック・ケミストリー
- マテリアルサイエンス 材料科学
背景:
- アゾベンゼン誘導体は,光反応性分子である.
- 水素結合の超分子組成は,調節可能な性質を提供します.
- メラミンとバービチュラート単位は,安定した複合体を形成することができます.
研究 の 目的:
- 光反応性超分子アセンブリを設計・合成する.
- アゾベンゼン付属のメラミン・バービチュラート複合体の形成と性質を調査する.
- 超分子構造の形成を光の誘発で達成する.
主な方法:
- トリドデシロキシフェニル (TDP) を用いたアゾベンゼン付メラミン (M2) とバービチュラート (B2) の合成.
- サイクリック・ヘクサマー (ローゼット) の特徴化には,サイズ排除染色法,ダイナミック光散乱, (1) H NMR,UV-VISスペクトロスコーピーを用いた.
- アゾベンゼン分子の紫外線と可視光照射によるフォトアイソメリゼーション研究 (EからZまで).
主要な成果:
- 安定したサイクルヘクサマーEE-M2(3).B2(3) のロゼットは,様々な溶媒で形成された.
- TDPののステリック混雑は,ローゼット内の光異性化を抑制しました.
- ZZ-M2は,ステリック障害によるB2との合併症の減少を示した.
- 可視光照射は,ZZ-M2とB2の混合物からロゼット形成を誘発した.
結論:
- TDPケイズのステリックの大部分は,アゾベンゼン光異性化と複合化に影響を与えます.
- フォト調節可能な複合化の効率は,光によって誘発された超分子組成を可能にします.
- この研究は,水素結合ロゼットの形成を光化学的に制御する方法を実証しています.
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