4'-ピリミジニル-機能化された4,2':6',4''-テルピリジン:溶液からの金属有機組立物とAu{11}とCu{11}の表面プラットフォーム
Thomas Nijs1, Y Maximilian Klein2, S Fatemeh Mousavi1
1Department of Physics, University of Basel , Klingelbergstrasse 82, 4056 Basel, Switzerland.
Journal of the American Chemical Society
|February 10, 2018
まとめ
この研究では,溶液と表面での銅-テルピリジン複合体の結晶の成長を比較しています. 表面上では,これらの金属有機フレームワークは,温度と基板によって影響される多孔ネットワークや梯子モチーフを含む多様な構造を形成します.
科学分野:
- 協調化学
- 材料科学
- 表面科学
背景:
- メタル・オーガニック・フレームワーク (MOF) は,触媒,ガス貯蔵,電子学の応用がある多用途の材料です.
- MOFの表面での自己組み立ての理解は,高度な機能的な材料とデバイスの開発に不可欠です.
- 銅-テルピリジン複合体は,複雑な超分子構造を構築するための調整可能な性質を提供します.
研究 の 目的:
- 溶液中の銅-テルピリジン複合体の結晶の成長と,表面上の組み立てを比較的に調査する.
- 4'-(2-R-ピリミジン-5-イル) -4,2':6',4''-テルピリジン (R = H,Me,Et) の銅との自己組み立て行動に対する異なる置換物の影響を調査する.
- スキャントンネル顕微鏡 (STM) を用いて結果の構造を特徴付け,その熱安定性を分析する.
主な方法:
- 3つの異なるテルピリジン結合体による銅 (II) と銅 (I) 複合体の溶液相合成.
- 超高真空条件下で,Au{111}とCu{111}の表面にターピリジンリガンドと銅アダトムの自己組み立て.
- スキャントンネル顕微鏡 (STM) を用いて分子構造と組立パターンを解明する.
主要な成果:
- 溶液では,銅-テルピリジン複合体は1Dのジグザグ鎖と2Dのシートを形成し,溶媒分子はリガンドとノードとして作用する.
- Au{111}では,リガンド1と2は密集した組成を形成し,リガンド3は多孔なネットワークを形成した.
- 銅アダトムの堆積により,梯子状のモチーフに再編成され,解熱時にロムボ状またはナノ孔状のネットワークに変形しました.
結論:
- 表面上の銅-テルピリジン複合体の自己組み立ては,基板と冷却温度に大きく依存しています.
- 表面に支えられている金属有機組は,溶液相の対称物と比べて異なる構造モチーフを示している.
- テルピリジンリガンドの置換剤は,初期表面組成を決定する役割を果たし,熱処理は重要な構造変化につながる可能性があります.
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