Pyrrolo[3,2-b]pyrrole-Based Covalent Triazine Framework: Three-dimensional Organization of Pores Using Nanostructural Spherical Carbon

This study shows that covalently immobilizing triazine-based structures on spherical carbon nanostructures results in the organization of micro- and mesopores in a three-dimensional manner. We selected the nitrile-functionalized pyrrolo[3,2-b]pyrrole unit to form triazine rings to construct a covalent organic framework. Combining spherical carbon nanostructures with the triazine framework produced a material with unique physicochemical properties, exhibiting the highest specific capacitance value of 638 F g-1 in aqueous acidic solutions. This phenomenon is attributed to many factors. The material exhibits a large surface area, a high content of micropores, a high content of graphitic N, and N-sites with basicity and semi-crystalline character. The hybrid systems containing triazines and carbon nano-onions were, for the first time, used as electrodes for supercapacitors. Thanks to the high structural organization and reproducibility, and remarkably high specific capacitance, these systems are a promising material for use in electrochemistry.