サイクラムコアのデンドリマーと[Ru(bpy) ((CN) ]2-4]をベースにした,プロトン駆動の自己組み立てシステム

Giacomo Bergamini¹, Christophe Saudan, Paola Ceroni

¹Dipartimento di Chimica G. Ciamician, Università di Bologna, via Selmi 2, I-40126 Bologna, Italy.

Journal of the American Chemical Society

|December 17, 2004

まとめ

Protonated cyclam hostsは,リガンド1と2のように,ルテニウム複合体とのアダクトを形成する. これらのアダクトは論理ゲート行動を示し,光学出力を酸と塩基刺激で切り替える.

科学分野:

協調化化学について
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:

1,4,8,11-テトラアザサイクロテトラデカーン (サイクラム) およびその誘導体は,協調化学における重要な結合体である.
陽子化されたサイクラム派生体は,金属複合体の宿主として作用する.
ルテニウムポリピリジル複合体は,その光物理的特性で知られている.

研究の目的:

[Ru (((bpy)) (((CN)) 4 (((2-)) と機能化されたサイクラムリガンドの間の酸駆動アダクトの形成と性質を調査する.
これらの誘導体内の宿主-ゲストの相互作用とエネルギー転送メカニズムを探求する.
分子論理演算におけるこれらのアダクトの潜在能力を実証する.

主な方法:

機能化されたサイクラムリガンドとルテニウム複合体の合成と特徴付け.
誘導体形成とエネルギー移転をモニタリングするためのスペクトル観測 (吸収と放出) 試験.
添加物を誘導し,破壊するために,酸と塩基による定位実験.
論理ゲート動作 (XORとXNOR) を決定するために光学出力の分析.

主要な成果:

安定したアダクトの形成 [[Ru(bpy) ((CN) [4](2-). (2H+).1] と [[Ru(bpy) ((CN) 4) ((2-).) となっている. (2H+).2] 溶液に溶かした.
ナフチル単位の効率的な光消火は,ルテニウム複合体へのエネルギー転送を通じて行われます.
アドクトは,塩基またはさらなる酸を加えることで,逆転的に破壊することができます.
異なる光学出力 (ナフタレンとRu (bpy) 放射) に基づくXORとXNORの論理ゲート行動の実証.

結論:

機能化されたサイクラム・リガンドは,陽子化されたルテニウムシアン化物複合体を効果的にホストすることができます.
その結果生じる超分子アダクトは,調節可能な光物理的性質を示す.
これらのシステムは,化学刺激に反応する分子論理ゲートを開発するためのプラットフォームとして機能します.

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