EMM-23:一个稳定的高化物多维地石,具有超大三形通道
Tom Willhammar1, Allen W Burton, Yifeng Yun
1Inorganic and Structural Chemistry and Berzelii Center EXSELENT on Porous Materials, Department of Materials and Environmental Chemistry, Stockholm University , Stockholm SE-106 91 Sweden.
Journal of the American Chemical Society
|September 9, 2014
概括
研究人员开发了EMM-23,一种新的,稳定的,三维的,极大孔径的酸热. 这种材料提供独特的三形孔,用于先进的催化和分离重的分子.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 纳米技术 纳米技术
背景情况:
- 热质石是催化和分离的关键工业材料.
- 开发超大孔泽奥利特对于处理大型分子至关重要.
- 现有的热石往往缺乏特定工业应用所需的稳定性或孔隙尺寸.
研究的目的:
- 为了合成和表征一种新的,稳定的,三维的,极大孔径的酸焦化物.
- 研究新材料的独特结构特征和孔隙结构.
- 评估这种热带石在催化和分离中的稳定性和潜在应用.
主要方法:
- 使用电子晶体学,固态核磁共振 (NMR) 和粉末X射线衍射来确定结构.
- 对石框架的孔系统和原子连接性的分析.
- 通过化进行热稳定性评估.
主要成果:
- 发现EMM-23,这是第一个稳定的,三维的,超大孔的酸焦岩石.
- 识别了非常不寻常的三形孔 (21-24个四面体原子),由10环通道系统交叉.
- 观测到高密度的内在Q(2) 和Q(3) 物种,与典型的Q(4) 物种不同.
- 在540°C的烧焦后,EMM-23显示稳定性.
结论:
- EMM-23 代表了热带石合成的重大进步,提供了前所未有的毛孔结构.
- EMM-23的独特框架和孔状特征对工业催化和体积较大的分子的分离充满希望.
- 直接将Q(2) 种类纳入热带石框架,为热带石的设计和功能开辟了新的途径.
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