シングル・酸素・原子・ブリッジ・バイメタリック・システムを右に押す:暗号化されたCo-O-Coユニット
Julia M Stauber1, Eric D Bloch1,2, Konstantinos D Vogiatzis3
1Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States.
Journal of the American Chemical Society
|November 13, 2015
まとめ
この研究は,ユニークなCo-O-Coコアを形成するディコバルト複合体を導入します. この複合体は酸化剤とカタラーゼとして作用し,効率的な酸素原子移転反応を示しています.
科学分野:
- 無機化学
- 協調化学
- カタリシス
背景:
- ディコバルト複合体は,その触媒性により興味をそそる.
- 金属と金属の相互作用と酸化状態を理解することは,新しい触媒の設計に不可欠です.
研究 の 目的:
- Co ((II) イオンのコファシアル配列を持つ新しいディコバルト複合体を合成し,特徴づけること.
- Co-O-Coの核の形成とその反応性を調査する.
- ディコバルトシステムの酸化剤とカタラーゼとしての触媒的応用を探求する.
主な方法:
- ディコバルト複合体の合成と特徴付け
- 酸化状態の決定のためのX線吸収光譜 (XAS).
- マルチリファレンスの完全なアクティブ空間計算 (CASSCF) と二次乱射理論 (CASPT2)
- 酸化反応と触媒試験を含む反応性試験
主要な成果:
- 二コバルト (II) 複合体[Co2 (mBDCA-5t) ] (−2) (1) が合成され,コバルト (II) イオンの対面配列が形成された.
- カリウム超酸化物との反応により,線形Co-O-Co核を特徴とする新しい複合体[Co2O (mBDCA-5t) ] (mBDCA-5t) ] (mBDCA-5t) が生成された.
- 顕微鏡および計算データにより,両方の複合体におけるコバルトの+2酸化状態が確認された.
- 複合体2はCOとH2に対する2電子酸化行動を示し,複合体1を再生した.
- ディコバルト系はH2O2でカタラゼ活性を示した.
結論:
- この研究では,Co-O-Coコアを形成できる新しいディコバルト複合体を成功裏に合成し,特徴づけました.
- 複合体は効率的な2電子酸化剤とカタラゼとして機能し,酸素原子移転能力を示しています.
- このディコバルト系は,触媒と酸化反応における応用が期待されます.
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