The commercially available 2,3-diaminophenazine precursor can be efficiently produced with minimal waste from 1,2-phenylenediamine. The extremely low solubility of the compound in the commonly used NMR solvents prevents the characterization with liquid NMR, therefore a solid-state 1 H-13 C CP-MAS NMR was performed. The measurement revealed four main peaks at 104.3, 114.3, 128.9, and 141.2 ppm, corresponding to aromatic carbons in the TQC molecule, and additional peaks at 171.4 ppm and 154.0 ppm, indicating the presence of the carbonyl unit (C=O) in the oxidized form of TQC (Fig. ). Formation of both the oxidized TQC (2) and catechol TQC (1) forms were also observed in the synthesis of smaller ODQC analog, where a part of the catechol precursor compound (DQC) oxidizes to ODQC during soxhlet purification and drying at 80 °C on air (S1). Additionally, the successful synthesis of TQC was confirmed with MALDI-TOF mass spectrometry (Fig. , Fig. ), where a peak population is observed starting at 519.0 Da, which is in good agreement with the calculated exact mass of 519.1 Da for [TQC (1)+H] + . The most intensive peak in an expected isotopic pattern for [TQC (1)+H] + should be at 519.1 Da, however, there are several additional peaks with higher intensities visible in the spectrum, with masses increasing by 1 Da. They are present due to the laser-induced photoreduction of TQC. Namely, in contrast to the electrospray ionization, the determination of the exact mass of the compound with MALDI-TOF MS could be obscured by the reduction of compounds during the ionization process. Compounds containing quinone and pyrazine motifs were shown to get reduced during MALDI and FAB ionization conditions. Similar to the liquid NMR, the utilization of electrospray ionization (ESI) mass spectrometry did not yield results, presumably due to insufficient solubility. The morphology as can be seen from STEM imaging (Fig. and Fig. ) consists of different layers of material in an agglomerated form with some porosity. Overall, a nonordered structure is identified from the selected area electron diffraction (SAED) pattern (Fig. ). Edges from carbon (C K), nitrogen (N K) and oxygen (O K) were identified with Electron Energy Loss Spectroscopy (EELS) as shown in Fig. .