Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, People's Republic of China.
Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300072, People's Republic of China.
ACS Appl Mater Interfaces. 2017 Jul 12;9(27):22856-22863. doi: 10.1021/acsami.7b05870. Epub 2017 Jun 27.
Two-dimensional imine-linked covalent organic frameworks with hydroxyl groups, TAPT-DHTA-COF and TAPT-DHTA-COF, were respectively constructed by the condensation of 1,3,5-tris-(4-aminophenyl)triazine and 2,5-dihydroxyl-terephthalaldehyde under solvothermal and reflux conditions. Both COFs possess excellent thermal stability and a similar eclipsed stacking structure verified by XRD patterns. However, TAPT-DHTA-COF presented a larger surface area (2238 m/g) and higher crystallinity than TAPT-DHTA-COF. Significantly, copper ions are efficiently incorporated into the pores of these two COFs via the coordination interaction with hydroxyl groups and imine linkers. The obtained copper-containing COFs (Cu-COF and Cu-COF) were employed in the selective oxidation of styrene to benzaldehyde. Cu-COF with superior surface area (1886 m/g) and pore volume (1.11 cm/g) exhibited excellent catalytic performance and recyclability. This strategy not only provides a convenient approach to design imine-linked 2D COFs with hydroxyl groups, but also develops their novel application for catalysis.
两种含羟基的二维亚胺键联共价有机框架 TAPT-DHTA-COF 和 TAPT-DHTA-COF，分别是由 1,3,5-三(4-氨基苯基)均三嗪和 2,5-二羟基对苯二甲醛在溶剂热和回流条件下缩合而成。两种 COF 都具有优异的热稳定性和相似的面心立方堆积结构，这可以通过 XRD 图谱验证。然而，TAPT-DHTA-COF 比 TAPT-DHTA-COF 具有更大的比表面积（2238 m/g）和更高的结晶度。值得注意的是，铜离子通过与羟基和亚胺配体的配位相互作用，有效地被纳入到这两种 COF 的孔道中。所得的含铜 COF（Cu-COF 和 Cu-COF）被用于苯乙烯的选择性氧化为苯甲醛。具有更高比表面积（1886 m/g）和孔体积（1.11 cm/g）的 Cu-COF 表现出优异的催化性能和可回收性。该策略不仅为设计含羟基的二维亚胺键联 COF 提供了一种简便的方法，而且还为其在催化方面的新应用开辟了道路。
