0,+1,+2,または+3の電荷を持つNIR発射型Yb (III) コンプレックスにおける感受性経路
Emilie Mathieu1, Salauat R Kiraev1, Daniel Kovacs1
1Department of Chemistry, Ångström Laboratory, Uppsala University, Box 523, 75120 Uppsala, Sweden.
Journal of the American Chemical Society
|November 8, 2022
まとめ
新しいイテルビウム (III) 複合体は,マクロサイクリックリガンドで調節可能な発光を示す. 研究者は,リガンドの改変がYb (III) 感受性および減少ポテンシャルにどのように影響するか調査し,異なる電荷にもかかわらず一貫した発光効率を発見した.
科学分野:
- 協調化学
- フォト物理学
- ランタニド複合体
背景:
- マクロサイクルリガンドは金属イオンの安定化に不可欠です.
- カーボスティリル染色体はランタニド感受性のために使用されます.
- トゥーニングチャージとドナーグループが 複雑な性質に影響します
研究 の 目的:
- マクロサイクルリガンドとカルボスティリル染色体でYb (III) 複合体を合成する.
- リガンドドナー群 (カルボキシラート対カルバミド) と総合的な負荷が複合性体に与える影響を調査する.
- Yb (III) /Yb (II) 還元ポテンシャルとYb (III) 発光感受性を分析する.
主な方法:
- 1,4,7,10-テトラザサイクロドデカンの誘導体によるYb (III) 複合体の合成
- パラマグネティック1H NMRスペクトロスコーピーは,座標幾何学を決定する.
- 還元電位を測定するサイクル電位測定法
- 光発光スペクトロスコーピーは,感受性と量子収量を定量化します.
主要な成果:
- 座標幾何学は,カーボキシラート/アミドの置換によってほとんど影響を受けなかった.
- Yb (III) / Yb (II) の還元ポテンシャルが複素電荷で移動し,より陽性な電荷ではより簡単に減少します.
- カーボスティリル刺激は全ての複合体においてYb (III) 発光を引き起こした.
- カルボスティリルからYb (III) に光誘発された電子移転 (PeT) が観察され,カルボスティリルの光度が低下した.
- 発光量子産量は,メチル化アミドを含む+3電荷の複合体を除いて,一般的に一定であった.
- NHの振動はYb (III) の放出を抑制し,より速いPETは,競合するフォノン補助エネルギー伝送 (PAEnT) によって感受性の効率を向上させなかった.
結論:
- リガンドの設計は,Yb (III) 複合性,すなわち還元性に対する制御を提供します.
- 光誘発電子伝送とフォノン補助エネルギー伝送は,Yb (III) 感受性において重要な役割を果たす.
- NHの振動的な消火などの課題にもかかわらず,Yb (III) 複合体は有望な発光材料である.
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