ゲストによって誘発された,磁気的に活性な超マイクロポラス,ギズモンドン型,銅の調整ネットワークの改変 (II)
Jorge A R Navarro1, Elisa Barea, Antonio Rodríguez-Diéguez
1Departamento de Química InorgAnica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain. jarn@ugr.es
Journal of the American Chemical Society
|March 7, 2008
まとめ
新しい協調ポリマーは,選択的なガス吸収特性を持ち,水素と窒素の分子として作用します. この材料はまた,高温で二酸化炭素を吸収し,磁気行動に影響を与えます.
科学分野:
- マテリアルサイエンス 材料科学
- 化学 化学は化学です.
- 固体化学 固体化学
背景:
- コーディネーションポリマーは,ガス吸収のための調節可能な構造を提供します.
- 超微孔質の材料は,選択的なガス分離と貯蔵の鍵となります.
研究 の 目的:
- 新種の超微孔質協調ポリマーを合成し,特徴づけること.
- 選択的なガス吸収特性 (H2,N2,CO2) を調査する.
- 材料の磁気特性に対するガス吸着の影響を調査する.
主な方法:
- 協調ポリマー [Cu(F-pymo) 2 ((H2O) 1.25]n.n.の合成と構造的特徴づけ
- 構造分析のための可変温度X線粉末 difraktion (TXRPD) について.
- ガスアドソルプション/デソルプションを様々な温度と圧力で測定する.
- マグネティックプロパティの測定.
主要な成果:
- 材料, [Cu(F-pymo) 2 ((H2O) 1.25]n (1) は,螺旋的なチャネルを持つGISトポロジーを示しています.
- 活性化形態 (1') は,サイズ排除によって77 Kで,選択的にN2よりもH2を吸収します.
- 高温 (433Kまで) で,チャネル膨張によってCO2が吸収されます.
- ガス吸収は,液体/固体状態に匹敵する高密度のゲスト分子につながる.
- CO2の組み込みにより,磁気移行温度が22Kから29Kに上昇します.
結論:
- 合成されたコーディネーションポリマーは,選択的なガス吸附能力を示しています.
- 材料の多孔構造と可逆脱水は,ガス分離アプリケーションに適しています.
- ガス組み込みは,磁気オーダー温度に大きく影響し,ゲストとホストの相互作用を示しています.
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