三氟乙酸
吸附
吸附
化学
选择性
金属有机骨架
催化作用
路易斯酸
傅里叶变换红外光谱
环氧化物
红外光谱学
漫反射红外傅里叶变换
布朗斯特德-洛瑞酸碱理论
无机化学
有机化学
化学工程
光催化
工程类
作者
Zhuo‐Rui Jiang,Hengwei Wang,Yingli Hu,Junling Lu,Hai‐Long Jiang
出处
期刊:Chemsuschem
[Wiley]
日期:2015-02-04
卷期号:8 (5): 878-885
被引量:196
标识
DOI:10.1002/cssc.201403230
摘要
Abstract A sulfone‐functionalized metal–organic framework (MOF), USTC‐253, has been synthesized that exhibits a much higher CO 2 uptake capacity (168–182 %) than the corresponding unfurnished MOFs. The introduction of trifluoroacetic acid (TFA) during the synthesis of USTC‐253 affords defect‐containing USTC‐253‐TFA with exposed metal centers, which has an increased CO 2 uptake (167 %) compared to pristine USTC‐253. USTC‐253‐TFA exhibits a very high ideal adsorption solution theory selectivity ( S =75) to CO 2 over N 2 at 298 K. In addition, USTC‐253‐TFA demonstrates good catalytic activity and recyclability in the cycloaddition of CO 2 and epoxide at room temperature under 1 bar CO 2 pressure as a result of the presence of Lewis and Brønsted acid sites, which were evaluated by diffuse reflectance infrared Fourier transform spectroscopy with a CO probe molecule. We propose that the CO 2 adsorption capability has a positive correlation with the catalytic performance toward CO 2 conversion.
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