Functionalization of covalent organic frameworks (COFs) with specific groups will endow them special characteristics, and further complexation with transition metals may improve their catalytic performance and widen their applications. Herein, we constructed an amino-functionalized covalent organic framework TpPa–NH2 by the facile reduction in TpPa–NO2 and took it as a carrier for transition metal ion Cu(II) to yield a hybrid Cu–COF. All characterizations verified that the crystallinity and porosity of original COF were retained after functionalization. Subsequent evaluation of their catalytic performance indicated that the framework TpPa–NH2 has potential application in alkali-catalyzed reactions, while the hybrid Cu–COF displayed satisfactory catalytic performance both in selective oxidation of styrene and the reduction in 4-nitrophenol to 4-aminophenol. The above results demonstrated that TpPa–NH2 is a promising platform with diverse applications, and the introduction of Cu(II) will endow the material with more potential applications in oxidation and reduction reactions.

中文翻译：

---

氨基功能化共价有机骨架的构建及催化应用

具有特定基团的共价有机骨架（COFs）的功能化将赋予它们特殊的特性，进一步与过渡金属络合可以提高其催化性能并扩大其应用范围。在此，我们通过在 TpPa-NO2 中的轻松还原构建了氨基官能化的共价有机骨架 TpPa-NH2，并将其作为过渡金属离子 Cu(II) 的载体以产生混合 Cu-COF。所有表征都证实了原始 COF 的结晶度和孔隙率在功能化后得以保留。随后对其催化性能的评估表明框架 TpPa-NH2 在碱催化反应中具有潜在的应用，而杂化Cu-COF在苯乙烯的选择性氧化和4-硝基苯酚还原为4-氨基苯酚方面均表现出令人满意的催化性能。上述结果表明，TpPa-NH2 是一个具有多种应用前景的平台，Cu(II) 的引入将使该材料在氧化和还原反应中具有更多的潜在应用。