多孔兰化物有机框架:合成,表征和前所未有的气体吸附特性
Long Pan1, Kristie M Adams, Hayden E Hernandez
1Department of Chemistry, University of Colorado at Denver, Campus Box 194, P.O. Box 173364, Denver, Colorado 80217-3364, USA.
合成和表征了新的兰坦化协调聚合物. 这些材料具有多孔性和二氧化碳的选择性吸附,这表明在气体分离技术中的潜在应用.
科学领域:
- 无机化学 无机化学 有机化学
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
背景情况:
- 兰化物协调聚合物是具有多样化应用的先进材料.
- 热水合成为创建复杂无机结构提供了一种多功能途径.
- 1,4-氨酸 (H2PDA) 是一个有用的有机连接器,用于构建协调框架.
研究的目的:
- 通过使用Ln(NO3) 3和H2PDA.合成和表征新型兰坦化协调聚合物.
- 研究由此产生的材料的结构性质和多孔性.
- 评估气体吸附能力,特别是二氧化碳,并探索潜在的应用.
主要方法:
- 兰坦化协调聚合物的水热合成.
- 单晶和粉末X射线衍射用于结构分析.
- 热重力测量分析 (TGA) 用于评估热稳定性.
- 气体 (H2O,CO2,Ar,N2) 的吸附/脱附研究.
主要成果:
- 同结构的兰化物协调聚合物[Ln{2}{PDA}{3}{H2O}]x2H2O (Ln=La,Er) 已成功合成.
- 晶体结构具有1D开放通道,能够容纳客分子.
- 疏散的框架[ Er 2 PDA 3 ]具有孔隙性,孔隙窗的大小为 3.4 Å,并选择性地吸附 CO2 超过 Ar 和 N2.
- 该材料表现出高达450°C的稳定性.
结论:
- 合成的兰化物协调聚合物具有可调节的多孔性.
- 二氧化碳的选择性吸附表明了气体分离应用的潜力.
- 观察到的选择性归因于毛孔大小和宿主-客人相互作用的组合.
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