相互可转换的模块化框架和分层的兰坦化 (III) - 乙烯基酸协调聚合物
F N Shi1, L Cunha-Silva, R A Sa Ferreira
1Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
Journal of the American Chemical Society
|December 14, 2007
概括
合成了新的微孔和分层协调聚合物,这些聚合物是基于乙烯酸的. 这些材料表现出石类型的行为和可调节的光发光特性,具有框架和分层结构之间相互转换的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 协调聚合物提供可调节的结构和特性.
- 微孔材料对于分离和催化是至关重要的.
- 基于兰化物的材料具有独特的光发光特性.
研究的目的:
- 合成和结构性表征新型同结构模块化微孔和分层协调聚合物.
- 为了研究框架材料的热稳定性和热带石类型的行为.
- 探索这些化合物的光发光特性和结构互转换.
主要方法:
- 热水合成的热水合成
- 单晶和粉末X射线衍射的X射线衍射.
- 固态NMR光谱学 固态NMR光谱学
- 热重力测量分析分析
- 光发光光谱学 光发光光谱学
主要成果:
- 成功合成了框架类型的Na2[Y(hedp) ((H2O) 0.67]和Na4[Ln2 ((hedp) 2 ((H2O) 2].nH2O,以及分层协调聚合物[Eu ((H2hedp) ((H2O) 2].H2O,Na0.9[Nd0.9Ge0.10 ((Hhedp) ((H2O) 2],[Ln ((H2hedp) ((H2O) 3H2O,和[Yb ((H2hedp) ]H2O.
- 框架材料表现出可逆的水分去除,并保持高达475°C的结构完整性,表现出岩类型的行为.
- 含有Eu的化合物的光发光特性对水合很敏感.
- 通过受控的合成条件 (例如,添加HCl或NaCl) 可以实现3D框架和分层结构之间的相互转换.
- 基于一个 (H2O) 13集群的独特的2D水网络在分层的[Y(H2hedp) ((H2O) ]中观察到.
结论:
- 基于埃迪龙酸的新型微孔和分层协调聚合物已成功合成和表征.
- 这些材料表现出有前途的热带石类型行为和可调节的光发光,在分离和传感方面有潜在的应用.
- 观察到的结构互转凸显了水热合成在设计复杂无机材料方面的多功能性.
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