3つのYb@C82イソマーとNi ((II) ((オクタエチルポルフィリン) と共結晶化した単結晶X線 difraktion研究
Mitsuaki Suzuki1, Zdenek Slanina, Naomi Mizorogi
1Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba, Ibaraki, Japan.
Journal of the American Chemical Society
|October 23, 2012
まとめ
この研究では,X線結晶学を用いて,3つのYb@C(82) 同性体の構造を正確にマッピングしました. イートルビウムイオン (Yb2+) は,理論的な計算によって確認されたフルレンのケージ内の好ましい位置を示しました.
科学分野:
- フルレレンと金属フルレレン
- 超分子化学 超分子化学
- マテリアルサイエンス 材料科学
背景:
- Yb@C(82などの金属フルラーネは,そのユニークな電子的および構造的特性により,著しい関心があります.
- フルレンケージ内の金属イオンの正確な位置を理解することは,その行動と応用を予測するために不可欠です.
- 以前のYb@C(82) イソマーの構造の研究は,特に二価金属イオンを封じ込めているものについては,限られていた.
研究 の 目的:
- 3つの特定のYb@C(82イソマー (Yb@C(2) ((5) -C(82),Yb@C(s) ((6) -C(82),およびYb@C(2v) ((9) -C(82)) の分子構造を正確に解明する.
- これらのフルレンケージ内のYb(2+) イオンの好ましい位置を決定する.
- 双価金属イオンをカプセル化したC{2v) }{9}-C{82}ケージを持つメタロフルレンに関する最初の結晶学レポートを作成.
主な方法:
- Yb@C(82) の同位体とNi ((II) ((オクタエチルポルフィリン) の共結結晶化).
- X線 difraksionを用いた正確な結晶学的解明.
- 静電電位図を分析するために,B3LYPレベルの理論を用いた理論的計算.
主要な成果:
- 複数の金属の位置が,研究されたすべてのYb@C(82) イソマーで特定されました.
- Yb@C(2) ((5) -C(82) とYb@C(2v) ((9) -C(82) のイソマーの六角形のリングの近くにあるYb(2+) イオンが主として定着している.
- Yb@C (((s) ((6) -C ((82)) 同位体では,Yb (((2+) イオンが[5,6,6]結合の炭素原子の近くで見つかりました.
- 理論的な計算により,これらの金属の位置がエネルギー最小値と安定した構成に対応することを確認しました.
結論:
- この研究は,ケージ対称性と金属イオン位置の詳細を記載した3つのYb@C(82) イソマーの正確な構造データを提供します.
- 発見は,異なるC82ケージ構造内のYb2+) イオンのための特定の好ましい結合部位を明らかにした.
- この研究は,メタロフルレンの構造的特徴,特にM(2+)@[C(2v)(9) -C(82) ](2-) システムの構造的特徴の重要な進歩を表しています.
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