Characterization of Lewis Acid Sites in Metal-Organic Frameworks Using Density Functional Theory

被引：54
|
作者：
Liu, Dahuan [1 ]
Zhong, Chongli [1 ]
机构：
[1] Beijing Univ Chem Technol, Lab Computat Chem, Dept Chem Engn, Beijing 100029, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 01期
基金：
中国国家自然科学基金;
关键词：
CATALYTIC-PROPERTIES; CO ADSORPTION; ZEOLITES; COMPLEXES; MOLECULE;
D O I：
10.1021/jz900055k
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The properties of Lewis acid sites in two MOFs, Cu-BTC and Cu-MIPT, were studied by using density functional theory (DFT). The strengths of these sites were investigated through exploring the geometry parameters', the natural bond orbital (NBO) charge, and the vibrational frequency. as-well as the adsorption energy of the probe CO molecule. The results show that both MOFs have Lewis acid sites, and the strength of the Lewis acid sites in Cu-BTC is stronger than that in Cu-MIPT. In addition, proposals for enhancing the acid strength of MOFs are discussed; increasing the number of atoms with high electronegativity in organic linkers and modification of the metal cation by the one with more empty d orbits are suggested as the two possible ways.
引用
收藏
页码：97 / 101
页数：5
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