"オン・オフ"のAu (I)...Cu (I) 相互作用は,Au (NHC) 2の発光性バポクロミックセンサで発生する
Christoph E Strasser1, Vincent J Catalano
1Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA.
Journal of the American Chemical Society
|July 3, 2010
まとめ
この研究は,溶媒の蒸気に対する反応として色を変える新しい発光金銅化合物を導入しています. これらの蒸気色材料は,繊細な化学センサーアプリケーションの可能性を秘めています.
科学分野:
- 協調化化学について
- マテリアルサイエンス 材料科学
- 発光材料 発光する材料
背景:
- 金 ((I) 及び銅 ((I) 複合体は,その多様な協調化学と発光特性で知られている.
- N-ヘテロサイクリックカルベン (NHCs) は,金属の中心を安定させ,その電子特性に影響を与える多機能リガンドです.
- 蒸気に曝露した際に光学特性の変化であるVapochromismは,センサー開発の望ましい特徴です.
研究 の 目的:
- 新しい異金属金銅複合体をNHCリガンドで合成し,特徴づけること.
- 溶媒の蒸気によって誘発される発光変化に焦点を当てて,これらの複合体のヴァーポクロミックな振る舞いを調査する.
- 観測されたバポクロミズムを制御する構造的および電子的要因を解明する.
主な方法:
- トリケーション性金 ((I) - 銅 ((I)) 複合体 ([Au ((NHC)) ((2))) ((+)) [Cu ((MeCN)) ((2))) ((2+)) とそのメタノール添加物の合成.
- 合成化合物の分子構造を決定する単結晶X線 difraktion.
- 様々な溶媒の蒸気 (MeOH,MeCN,アセトン,H2O) に曝露した際の放射色変化を監視するための発光スペクトロスコーピー.
主要な成果:
- 金 ((I) 銅 ((I) 複合体とそのメタノールアダクトは,明確な発光色 (それぞれ青と緑) を表します.
- 構造は,溶媒の調整/解離時にAu-Cu相互作用と調整環境の変化を明らかにします.
- 青から緑,黄色,オレンジの可逆色の変化は,異なる溶媒の蒸気にさらされたときに観察され,バポクロミズムを示した.
結論:
- 合成された金 (I) -銅 (I) 複合体は,効果的な分子蒸気色材料である.
- 溶媒の蒸気によって誘発されるリガンド置換反応は,Au-Cu相互作用の"オン・オフ"に起因する,光度に大きな変化を誘発する.
- これらの材料は,化学センシングおよび反応性材料のアプリケーションに希望を示しています.
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