カルコゲンに富んだランタニドクラスター:クラスター反応性と補助リガンドが構造に及ぼす影響
A Y Kornienko1, T J Emge, J G Brennan
1Department of Chemistry, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, USA.
Journal of the American Chemical Society
|November 29, 2001
まとめ
セレニウムと硫黄のリガンドを含むイテルビウム複合体を合成し,ユニークな正方形とロンボエドール構造を明らかにした. これらのクラスターは容易な相互変換を示し,イテルビウムセレニド材料に分解することができます.
科学分野:
- 無機化学 無機化学とは
- 有機金属化学 有機金属化学
- マテリアルサイエンス 材料科学
背景:
- イタービウム複合体は,そのユニークな電子的および構造的性質のために興味を惹きます.
- カルコゲニド結合体を持つ新しいクラスターの合成は,調節可能な性質を持つ新しい材料につながる可能性があります.
研究 の 目的:
- 新しいイテルビウム・カルコゲニドのクラスタを合成し,特徴づけること.
- これらのクラスターの構造的多様性と反応性を調査する.
- イテルビウムセレニド材料の前駆体としての可能性を探求する.
主な方法:
- ピリジンのイテルビウム金属とPhEEPh (E = S,Se,Te) と元素Seの反応.
- 結晶化とX線微分分析により,結果となるクラスターの構造を決定する.
- クラスター相互変換反応と熱分解の調査.
主要な成果:
- 3つの新しいイテルビウムクラスターが合成されました: (ピリジン) ((8) Yb ((4) SeSe) ((2) Se) ((2) mu ((2) -SPh) ((2) SPh) ((2), (py) ((8) Yb ((4) Se ((3) SeSeSeSePh) ((((0.38) SePh),および (py) ((8) Yb ((4) Se ((3) SeSePhTe) (((SeTePh).
- SePhおよびTePh化合物は,中央のSe(2)(-) リガンドの周りのYb(III) イオンの正方形の配列を特徴としており,リガンドの調整と結合に変化があります.
- チオラート化合物は,Se(2)(-) リガンドによって橋渡しされ,ディセレニドおよびSPhリガンドによってスパンされたYb(III) イオンのロンボエドルの配列を示しています.
- クラスター構造の間の容易な相互変換が観察され,熱分解によりイテルビウムセレニド材料が生じた.
結論:
- イタービウム・カルコゲニド・クラスターへの新しい合成経路が確立されています.
- 構造的多様性は,有機リガンドの性質とYb-E結合の強さから生じる.
- これらのクラスターは,イテルビウムセレニドナノ材料の制御合成のための有望な前駆体を表しています.
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