Zwitterionic π-electronic system based on porphyrin AuIIIcomplex

Deprotonated meso-hydroxyporphyrin Au III complex, acting as a zwitterion, was synthesized. In the solid state, the zwitterionic porphyrin formed a stacked columnar structure through dipole–dipole and [Formula: see text]–[Formula: see text] interactions. Energy decomposition analysis revealed that favorable dispersion forces were the primary contributors to the interactions between stacked zwitterionic porphyrin units. Furthermore, the solution-state absorption spectra of the zwitterionic porphyrin were influenced by the polarized structure, whereas the solid-state absorption spectra were associated with the packing arrangement.