Constitutional isomerism of the linkages in donor–acceptor covalent organic frameworks and its impact on photocatalysis

Abstract When new covalent organic frameworks (COFs) are designed, the main efforts are typically focused on selecting specific building blocks with certain geometries and properties to control the structure and function of the final COFs. The nature of the linkage (imine, boroxine, vinyl, etc.) between these building blocks naturally also defines their properties. However, besides the linkage type, the orientation, i.e ., the constitutional isomerism of these linkages, has rarely been considered so far as an essential aspect. In this work, three pairs of constitutionally isomeric imine-linked donor-acceptor (D-A) COFs are synthesized, which are different in the orientation of the imine bonds (D-C=N-A (DCNA)…

• AV
  Alexander von Humboldt-Stiftung
• DF
  Deutsche Forschungsgemeinschaft

  Awards: 390540038, 2008-390540038-UniSysCat, EXC 2008-390540038-UniSysCat, Germany's Excellence Strategy-EXC 2008-390540038, EXC 2008-390540038, EXC 2008
• BF
  Bundesministerium für Bildung und Forschung

  Award: 033RC024
• CS
  China Scholarship Council