固いペリレンペリレンジミド二酸化物の超高速光刺激後の電荷定位 暫定的なスターク効果によって可視化
Marius Koch1, Mykhaylo Myahkostupov2, Daniel G Oblinsky1
1Department of Chemistry, Princeton University , Washington Road, Princeton, New Jersey 08540, United States.
Journal of the American Chemical Society
|March 30, 2017
まとめ
ペリレンジミド-ブリッジ-ペリレン二酸化物における分子内電荷伝送 (CT) ダイナミクスの調査は,有意な電子結合を明らかにする. ブリッジユニットの回転が 荷電の局所化を促し 分子の内部に 強い電場を作り出します
科学分野:
- 写真化学
- 分子光譜法
- コンピュータ化学
背景:
- ペリレンダイミド・ブリッジ・ペリレン二酸化物 (PDIPe) は強い電子結合を示す.
- 内部電荷伝達 (CT) は,それらの光物理的性質を理解するために不可欠です.
研究 の 目的:
- PDIPeダイアードの分子内伝送 (CT) ダイナミクスを調査する.
- CT状態の形成と電荷の局所化におけるブリッジユニットの役割を解明する.
主な方法:
- 超高速の電子吸収スペクトル
- 量子化学の計算をする
- スターク効果と電荷密度の変動の分析
主要な成果:
- 光刺激は,保存されたイオン帯を持つ非局所化されたCT状態を形成する.
- スタークシフトによって示される ピコ秒の時間スケールで発生します
- アセチレンブリッジの周りの回転は CT状態の形成を完了させる.
- CT状態の電場強度は31MV/cmに達する.
結論:
- この研究は,強く結合された二酸化物におけるCTダイナミクスを明らかにする.
- ブリッジユニットの形状はCT状態の形成と電荷の局所化の鍵です.
- これらのダイナミクスを理解することは,複雑なスペクトロスコピクデータを解釈するために不可欠です.
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