The crystal structure of octakispentoxy-phthalocyaninatocopper with pyridines axially substituted: the molecules stacked with J-aggregates

For coordination with two pyridines at the axis, the ring skeleton of octakispentoxyphthalo- cyaninatocopper maintains planar conformation, different from the structure of octakisbutoxy- phthalocyaninatocopper reported previously. The structure shows all molecules stacked along the b axis to form a one-dimensional molecular chain; neighboring molecules in the chain are arranged as J-aggregates, consistent with its crystal diffuse reflectance spectroscopy (DRS) having a red shift compared with its electronic absorption spectroscopy in pyridine.