サルフォニルアジドの興奮状態と,超高速時間解像度IRスペクトロスコピーの分解過程の直接観察
Jacek Kubicki1, Hoi Ling Luk, Yunlong Zhang
1Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland.
Journal of the American Chemical Society
|April 3, 2012
まとめ
フェムトセカンドスペクトロスコーピーは,2-ナフチルスルフォニルアジド (2-NpSO((2) N(3) のS(1) 興奮状態を明らかにし,シングレット,そしてトリプレットニトロンへの分解を観察した. 内部変換は主要な無効化経路である.
科学分野:
- フォトケミストリー フォトケミストリー
- スペクトロスコーピーは,スペクトロスコーピーを用います.
- 量子化学とは,量子化学である.
背景:
- サルフォニルアジドは,汎用性の高い合成中間物質です.
- 興奮状態のダイナミクスを理解することは,反応性の制御に不可欠です.
研究 の 目的:
- 最先端のスペクトル検査技術を用いて,2-ナフチルスルフォニルアジド (2-NpSO(2) N(3) の光化学を調査する.
- 光分解で形成される興奮状態と一時的な種を特徴付けるために.
主な方法:
- 5秒間の時間解像度を持つ赤外線 (TR-IR) スペクトロスコーピー.
- 量子化学計算について.
- 330nmでのUV光分解です.
主要な成果:
- アジド振動帯を介して,2-NpSO((2) N(3) のS(1) 興奮状態を直接観察する.
- S(1) 状態のシングレットナイトレンへの分解の特徴付け,その後,システム間クロスでトリプルナイトレンへ.
- 効率的な無効化経路として,基底状態への内部変換の識別.
結論:
- この研究は,スルフォニルアジドのS(1) 興奮状態の最初の直接的な観察を提供します.
- 腐敗のメカニズムは,シングレットナイトレンの形成を伴うが,それは急速にトリプルナイトレンに変換される.
- 内部変換は,興奮状態の無効化における支配的なプロセスである.
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