Fig. 6: Solid state oligomerization of 1.
From: Polycyclic aromatic chains on metals and insulating layers by repetitive [3+2] cycloadditions
The MALDI-ToF mass spectrum after thermal annealing of 1 to 520 K for 72 h under vacuum (10−2 to 10−1 mbar) shows distinct peak groups indicative of intermolecular coupling upon formation of oligomers (dimers, trimers, tetramers, etc.). The separation of 290 m/z between these peak groups corresponds to the mass of one monomer unit (C21N2H10, chemical structure in the inset).
