[Cu3S2]3+コアにおけるS·S相互作用の可能性のX線吸収スペクトロスコピーおよび計算による調査
Ritimukta Sarangi1, Lei Yang, Stuart G Winikoff
1Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA. ritis@slac.stanford.edu
Journal of the American Chemical Society
|September 20, 2011
まとめ
この研究は,銅硫化核の電子構造を明らかにし,Cu2+) 酸化に近い銅中心とユニークな硫黄種を示しています. これは,軌道が重なり合っているため,類似の銅酸化物核と異なる.
科学分野:
- 無機化学 無機化学とは
- マテリアルサイエンス 材料科学
- コンピューティング・ケミストリー
背景:
- 金属カルコゲニド核の電子構造は,その反応性と性質を理解するために重要である.
- 同様の酸化銅のコアに関する以前の研究は,比較のための基礎を提供します.
研究 の 目的:
- [(LCu) (((3) ((S) ((2))) の[Cu(3) S(2) ](3+) コアの電子構造を調査する.
- 電子構造を類似の酸化銅核と比較するために.
主な方法:
- Cu と S K 端のX線吸収スペクトロスコーピー.
- 密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.
- マルチレファレンス二次波動理論 (MR-S2PT) の計算.
主要な成果:
- 銅の中心はCu (((2+)) の近くで酸化され,硫黄断片の電荷は硫化物 (S (((2-)) と亜硫化物 (S (((2) ((3-)) の間にある.
- [Cu (((3) S (((2)) ] (((3+) コアは,同類の [Cu (((3) O (((2)) ] (((3+) コアの局所化された構造とは異なり,非局所化された電子構造を示しています.
- Cu3d軌道とS3p軌道との共振重複の増加とS3p軌道の半径分布は,観測された電子構造に寄与しています.
結論:
- [Cu(3) S(2) ](3+) 核の電子構造は,軌道相互作用の違いにより,その酸素アナログと異なる.
- S-S σ*軌道から銅への電子密度ドーナメントは,異地化されたS=1基底状態を安定させます.
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