在具有暴露金属位点的永久微孔协调子中选择性气体吸附
Kaushalya Korathotage1, Nobuyuki Yamamoto1, Eric D Bloch1
1Department of Chemistry, Indiana University, Bloomington, Indiana 47405, United States.
Inorganic chemistry
|December 3, 2024
概括
我们使用Mo,Rh和Ru合成了新的多孔协调 (PCC). 这些材料显示出出色的气体吸附性能,以Mo为基础的子在CO2吸收方面出色,以Ru为基础的子在CO结合方面出色.
科学领域:
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
- 吸附科学 吸附科学
背景情况:
- 多孔协调 (PCC) 是金属有机框架 (MOF) 的分子类型.
- 在PCC中的协调不和金属中心对于调整小分子吸附至关重要.
- 对第二排过渡金属基PCC的研究是有限的.
研究的目的:
- 合成和描述基于Mo,Rh和Ru的新型M24L24立方体PCC.
- 为了研究这些PCC对CO2,CO和不和碳化合物的气体吸附特性.
- 了解金属酸在气体吸收和结合中的作用.
主要方法:
- 合成和激活M24L24 (M=Mo,Rh,Ru) 细胞.
- 气体吸附测量 (CO2,CO,C2H4,C3H6) 在298K.
- 计算BET表面积和结合能量的计算.
主要成果:
- 成功合成了Mo24 (((bdc) 24 ,Rh24 (((bdc) 24 和 [Ru24 (((bdc) 24 ]Cl12子.
- 获得的BET表面面积高达832 m2/g.
- [Mo24] 显示出最高的二氧化碳吸收量 (2.12 mmol/g);[Ru24] 显示出最强的二氧化碳结合力 (-75 kJ/mol).
- 通过pi-backbonding证明了不和碳化合物的选择性吸附.
结论:
- 开发了新的基于Mo,Rh和Ru的多孔混合固体.
- 突出了金属中心对气体吸附选择性和强度的影响.
- PCC提供可调节的平台,用于选择性气体捕获和分离.
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