熱的に安定したフルオロアルキルフルレレンは,斜五角形ピラミッド型でC60 (C2F5) 4O,C60 (CF3) 4O,C60 (CF3) 6と表記されています
Ivan E Kareev1, Natalia B Shustova, Igor V Kuvychko
1Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka 142432, Russia.
Journal of the American Chemical Society
|September 14, 2006
まとめ
新しいフルレンの派生物であるC(60) (((CF(3)) ((6) と2つのエポキシドは,ユニークな構造と熱安定性を有しています. これらの発見は,高温下でのスキー・ペンタゴナル・ピラミッド (SPP) 付加パターンの運動安定性を示しています.
科学分野:
- マテリアルサイエンス 材料科学
- 有機化学 オーガニック・ケミストリー
- ナノテクノロジー ナノテクノロジー
背景:
- フーラーレン,特にC ((60)) は,独特の電子的および構造的特性を有する炭素アロトロップである.
- フルレンをパーフルオロアルキル基 (R(f)) で機能化すると,その性質と安定性が変化する.
- スキー・ペンタゴン・ピラミッド (SPP) 添加パターンは,フルレンの化学で知られているモチーフです.
研究 の 目的:
- C(60) とトリフルオイオメタン (CF(3) I) とペンタフッ化エチルヨウ酸化物 (C(2) F(5) I) の高温反応を調査する.
- これらの条件下で形成されたイソマーとエポキシドを含む新しいフルレンの誘導体を特徴付ける.
- これらの新しい化合物,特にSPP添加パターンを持つ化合物の熱安定性と構造特性を評価する.
主な方法:
- C ((60) とCF ((3) I,C ((2) F ((5) Iの高温反応について.
- 質量スペクトロメトリ,DFT量子化学計算,ラマン,可視,および (19) F NMRスペクトロスコーピーを用いた特徴付け.
- エポキシド誘導体の構造的決定のための単結晶X線 difraktion.
主要な成果:
- SPPの加算パターンのC(s) -C(60) X(6) の同位体であるC(60) -CF(3)) の合成.
- 2つのエポキシド誘導体,C ((s) -C ((60)) -CF ((3)) ((4) OとC ((s) -C ((60)) -C ((2) F ((5)) ((4) Oの形成,SPPパターンの変異がある.
- C ((s) -C ((60) ((CF ((3)) ((6)) 化合物は,ステリカルに阻害されたC-C結合 (1.60 Å) と珍しい非高速交換 (19) F NMRスペクトルを示しています.
- エポキシドは,非フッ素の外体置換剤を伴う最初のポリ (perfluoroalkyl) フルレン誘導体であり,高温下でも安定しています.
- SPP加法パターンは,400°Cを超える温度でも運動安定性を示しています.
結論:
- フルレレン誘導体におけるSPP添加パターンは,高温 (>400 °C) で安定しています.
- perfluoroalkyl 置換剤は,フルレン誘導体の熱安定性を高めることができます.
- 合成された化合物は,材料科学における潜在的な応用を持つ新しいフルレン構造を表しています.
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