クロスリンクされたハイパーブランクポリグリセロールは,ゲスト分子の選択的結合のための宿主として使用されます
Ewelina Burakowska1, Jordan R Quinn, Steven C Zimmerman
1Department of Biology, Chemistry, and Pharmacy, Freie Universitat Berlin, Takustrasse 3, 14195 Berlin, Germany.
Journal of the American Chemical Society
|September 3, 2009
まとめ
Grubbsの触媒とハイパーブランチドポリグリセロール (HPG) を交互に結合させることで,選択的に複雑化し,バングラローズのような染料を放出する材料が生み出され,刺激反応性アプリケーションの可能性を示しています.
科学分野:
- ポリマー化学のポリマー化学について
- 超分子化学 超分子化学
- マテリアルサイエンス 材料科学
背景:
- 環閉メタテシス反応は, dendrimers を固くする.
- ハイパーブランチドポリグリセロール (HPG) は,複雑化のために機能化することができます.
- 染料の複合化と放出は,反応性のある材料の鍵です.
研究 の 目的:
- 様々な染料を用いた,改変されたハイパーブランチドポリグリセロール (HPG) の複合化および放出行動を調査する.
- HPGのゲスト結合特性に対するクロスリンクと化学変化の影響を調査する.
- これらのHPG材料の刺激反応性アプリケーションにおける可能性を評価する.
主な方法:
- グラブス触媒を用いたポリアリル化HPG (1) およびその交互結合アナログ (2, 5, 6) の合成.
- バングラバラとティモールブルーのナトリウム塩,バングラバラとティモールブルーのセシウム塩による複合性研究.
- アルケーン基の二酸化酸化により,HPG 3,4,7,8を生成する.
- UV-Visスペクトロスコーピー,ダイナミック光散射 (DLS),サイズ除外クロマトグラフィ (SEC) を使用した特徴付け.
主要な成果:
- HPG 1複合体はクロロフォームでバングラローズを吸収するが,水中に放出する.
- クロスリンクされたHPG 2複合体は,バングラバラとティモールブルーですが,水に放出しません.
- より大きなループのクロスリンクされた類似体 (5, 6) は,ピンクベンガルとティモルブルーを結合し,より容易に放出します.
- HPG 4は大きな集積物 (約 100 nm) の水は,高い塩分濃度で解離する.
結論:
- クロスリンクの密度とループのサイズは,染料の複合化と放出運動に大きく影響します.
- 改造されたHPGは,さまざまな染料対型に対して異なる結合親和性を示す.
- 観察されたHPG 4の塩分反応性集積は,刺激反応性材料の設計の可能性を示唆しています.
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