基于的 () MOF 的框架-拓-依赖性催化活性
Pravas Deria1, Diego A Gómez-Gualdrón, Idan Hod
1Department of Chemistry, Southern Illinois University , 1245 Lincoln Drive, Carbondale, Illinois 62901, United States.
Journal of the American Chemical Society
|November 3, 2016
概括
基于的金属有机框架 (MOF) 显示了转移的催化活性. MOF拓通过控制反应物的预度和对齐来影响反应速率,从而提高催化链接器的效率.
科学领域:
- 材料科学
- 催化剂
- 超分子化学
背景情况:
- 金属有机框架 (MOF) 是具有可调节结构和催化潜力的多孔材料.
- 乙转移反应是有机合成和生物化学的基础.
- 控制催化剂中的反应物接近度和方向对于提高反应速度至关重要.
研究的目的:
- 调查以为基础的多基的催化活性.
- 阐明MOF拓在通过反应剂预度和对齐影响反应动力学的作用.
- 将实验催化性能与分子建模见解相关联.
主要方法:
- 合成和表征基于的MOF (PCN-222,MOF-525,NU-902) 具有不同的拓 (csq,ftw,scu).
- 从N-乙利米达 (NAI) 转化为化碳醇 (PC) 区域异构体的催化活性和反应动力学的实验性确定.
- 分子建模以了解MOF毛孔内的反应物结合,预度和定向效应.
主要成果:
- 在一系列基于的MOF中证明了对转移的催化活性.
- 观察到与MOF拓相关的不同催化活性,特别是预度和导向效应.
- 实验反应速率与分子建模预测有关与框架氨酸位点的反应物相互作用.
结论:
- 通过调节反应物的预度和对齐,MOF拓显著影响了乙烯转移的催化效率.
- 具有特定拓的MOF的战略设计可以优化催化站点的定位,以提高反应速度.
- 这项工作突出了MOF作为定制催化剂的潜力,通过精确控制链接方位和反应物的可访问性.
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