ピリミディノンの結合金属の水素結合の間の電子移位によって形成される安定した混合弁複合体
Tyler M Porter1, Gavin P Heim1, Clifford P Kubiak1
1Department of Chemistry and Biochemistry , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093-0358 , United States.
Journal of the American Chemical Society
|September 29, 2018
まとめ
ルーテニウムクラスターの水素結合ダイマーにおける電子移転は急速に起こり,安定した混合バレント状態を形成する. これは水素結合による強力な電子通信を示し,高度に分散された電子構造を可能にします.
科学分野:
- 無機化学
- 超分子化学
- 電子移転の研究
背景:
- オックス中心のトリルセニウムクラスターは,その酸化還元活性で知られています.
- 水素結合は 分子の自己組織化と 電子通信において 重要な役割を果たします
- 混合バルント系における電子移転の理解は,分子電子学の発展の鍵である.
研究 の 目的:
- 酸素中心のトリルセニウムクラスターの水素結合自己ダイマーを通過する電子移転を調査する.
- 混合値ジメルの電子構造と安定性を特徴付ける.
- 強力な電子通信のための水素結合システムの可能性を探求する.
主な方法:
- メチレン塩化物のスペクトロ電気化学研究
- トリルテニウムクラスターの1電子還元.
- フーリエ変換赤外線 (FTIR) 光譜と線形分析 (光学ブロック) で電子伝送率 (k_ET) を決定する.
- 混合値ダイマーのための形成定数 (K_MV) の決定.
主要な成果:
- 一電子還元による急速な自己二分化により,強く結合された混合バレントの水素結合二分体 ((1_2) ^-) を形成する.
- 電子の移転速度 (k_ET) の推定値は 10^11 s^-1 であり,高度に分散された電子構造を示している.
- 高形成定数 (K_MV) ~10^6 M^-1は,水素結合の間の電子交換による重要な安定化 (~5.7 kcal/mol) を意味する.
- 振動と電子波の関数の強い混合をサポートします.
結論:
- 水素結合システムは,強力なドナー・ブリッジ・アクセプタ結合をサポートできます.
- 高度離散した電子構造は,水素結合の超分子組成で達成可能である.
- これらの発見は,水素結合が有意な電子通信には弱すぎるという考えに異議を唱える.
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