  2D conjugated polyphthalocyanines can be obtained as two distinctly different
types of material with specific molecular structures and different
morphological properties. It was believed that the temperature is the key
factor affecting the chemical reaction, but we show that even at the optimal
temperature (420{\deg}C), the reaction on vapor/solid interface and
liquid/solid interface yields different products: while the former is
well-polymerized and ordered, the latter is amorphous and cross-linked with the
typical conjugation scale of single PC ring. IR spectroscopy is most sensitive
tool for identifying the molecular structure, providing the information on
polymerization degree, structural uniformity and content of terminal groups. We
show that, unlike the ordered PPCs, the cross-linked product can be
reproducibly obtained as continuous conductive material.
