ガス介質の表面反応によるマイクロメートルスケールの高規則性単層アルキニル銀ネットワークの合成
Yi-Qi Zhang1, Tobias Paintner1, Raphael Hellwig1
1Physics Department E20 , Technical University of Munich , D-85748 Garching , Germany.
Journal of the American Chemical Society
|March 20, 2019
まとめ
研究者は,新しいガス媒介反応を用いて,銀の表面に拡張されたアルキニル銀のネットワークを合成しました. この方法は,材料科学における潜在的な応用を持つ オーダーされたナノ孔状のネットワークを作成します.
科学分野:
- 表面科学
- 有機金属化学
- 材料科学
背景:
- オーガノメタリックネットワークは,高度なアプリケーションのために調整可能な特性を提供します.
- 表面媒介合成はナノ構造の形成を制御する.
- アルキニル・シルバーの相互作用は,拡張ネットワークの構築の鍵です.
研究 の 目的:
- 拡張された有機金属アルキニルシルバーネットワークを合成するための新しいガス媒介表面反応プロトコルを開発する.
- デプロトン化とネットワーク形成の過程における分子酸素の役割を調査する.
- 形成されたネットワークの構造的性質と孔状の特徴を記述する.
主な方法:
- 超高真空下でのAg ((111) 表面上の拡張された有機金属蜂巣アルキニル銀ネットワークの合成.
- 分子酸素への制御された曝露を含むガス媒介の表面反応プロトコルを使用します.
- 1,3,5-tris ((4-エチニルフェニル) ベンゼン (Ext-TEB) 前駆物質のO2による200Kでの脱プロトン化.
- 遠距離ネットワークの形成を促すため 375 K への軽度な解熱.
主要な成果:
- 表面に毒をつけることなく,分子酸素による末端アルキン部分の効率的かつ化学選択的な脱プロトン化.
- 基板の銀原子を組み込んだ長距離の秩序付けられたアルキニル・シルバー・ネットワークの形成.
- ネットワークにおけるAg-bis-アセチリドモチーフと高い構造品質の観察
- 約8.3nm2のヴァン・デル・ワールスの空洞を持つナノ孔の規則的な配置の作成.
結論:
- O2媒介のガス表面反応プロトコルは,拡張された有機金属アルキニルシルバーネットワークを合成するための実行可能な方法です.
- 合成されたネットワークは,ナノ孔性の特性を有するよく定義された構造を示しています.
- このアプローチは,高貴な金属の表面上のネットワーク形成を正確に制御します.
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