室温での堆積率による分子間結合の制御:トリニトリル単層における水素結合と金属結合の比較
Thomas Sirtl1, Stefan Schlögl, Atena Rastgoo-Lahrood
1Department of Physics, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany.
Journal of the American Chemical Society
|December 20, 2012
まとめ
大量のトリニトリル分子の自己組み立てモノレイヤは,銅と銀の上で水素結合構造を形成した. 銅の上に形成される金属調整の多孔構造ですが,銀ではなく,基板に依存するアダトムの反応性によるものです.
科学分野:
- 表面科学とは,地表科学のことである.
- 材料化学 材料化学について
- ナノテクノロジー ナノテクノロジー
背景:
- 自己組み立てモノレイヤー (SAM) は,ナノスケールの表面工学にとって不可欠です.
- 機能的なトリニトリル分子は,SAM形成にユニークな性質を提供します.
- 基板特異的な相互作用を理解することは,分子組立を制御する鍵です.
研究 の 目的:
- 1,3,5-トリス,4 ext27-ビフェニル-4 ext22-炭素ニトリル) ベンゼンの Cu111) と Ag111) の表面での自己組み立てを調査する.
- 分子自己組み立てを指揮する基板アダトムの役割を明らかにする.
- 水素結合構造や金属結合構造を含む,さまざまなポリモルフの形成を調査する.
主な方法:
- トリニトリル分子の超高真空 (UHV) 堆積.
- 高解像度の表面イメージングのためのスキャニングトンネル顕微鏡 (STM).
- 構造分析のための低エネルギー電子 difraktion (LEED).
主要な成果:
- 水素結合ポリモルフはCu{11}とAg{11}の両方に観察されました.
- Cu{111}上に形成された金属調整の多孔型ポリモルフで,水素結合構造と共存しています.
- 金属調整ネットワークは,アダトムの反応性と協調結合の強さの差異に起因し,Ag{111}には存在しなかった.
結論:
- 基板の選択は,機能的なトリニトリル分子の自己組み立て結果に大きく影響します.
- 銅のアダトムは,金属連携ネットワークの形成を容易にするが,銀はそうしない.
- Cu ((111) 上のアダトムの運動学は,分子間結合と最終的な構造の選択を決定するために重要である.
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