  Since the discovery of polyphthalocyanines (PPCs) in late 1950s, numerous
attempts have been made to synthesize this 2D polymer by different approaches.
Interestingly, the reported IR, Raman and UV-vis spectra of PPCs show drastic
variation depending on the synthesis conditions. In this work, we show that the
spectral data obtained in some works should be assigned not to the target
polymer, but rather to octacyano phthalocyanine (OCP), which is an early step
of the reaction. We discuss the spectral signatures of the well-polymerized and
monomeric PCs based on reliable experimental data and support the spectral
assignments with DFT calculations.
