Three N鈥揌 Functionalized Metal鈥揙rganic Frameworks with Selective CO2 Uptake, Dye Capture, and Catalysis

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• 作者：Yu Zhu ; Yan-Mei Wang ; Sheng-Yun Zhao ; Pan Liu ; Chao Wei ; Yun-Long Wu ; Chang-Kun Xia ; Ji-Min Xie
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：July 21, 2014
• 年：2014
• 卷：53
• 期：14
• 页码：7692-7699
• 全文大小：592K
• ISSN：1520-510X

文摘

Three N鈥揌 functionalized metal鈥搊rganic frameworks, Pb-DDQ, Zn-DDQ, and Cu-DDQ, were synthesized with a new flexible dicarboxylate ligand based on quinoxaline (H₂DDQ = N,N鈥?dibenzoic acid-2,3-diaminoquinoxaline). CO₂ adsorptions indicate that Zn-DDQ and Cu-DDQ have greatly enhanced the CO₂ uptake due to the opposite N鈥揌 groups on pyrazine. With very small adsorption of N₂, Cu-DDQ shows high selectivity for CO₂ and N₂. The three MOFs also have large adsorptions of some selected dyes, while Zn-DDQ and Cu-DDQ with large but different shapes of pores are demonstrated to be promising materials for fast separation of MB/other and CV/other mixtures, respectively. The cyanosilylation of aldehydes and ketones with high yields in a short reaction time for Cu-DDQ indicates that Cu-DDQ has a higher Lewis acidity than the other two MOFs.