Control of absorption properties of tetraazaporphyrin group 15 complexes by modification of their axial ligands†
Abstract
Tetraazaporphyrin (TAP) complexes with group 15 elements (phosphorus(V) or arsenic(V)) containing two axial OH ligands showed reversible spectroscopic changes with acid or base doping. Spectroscopic and theoretical analysis revealed that the modification of axial ligands can tune the interaction between peripheral substituents and the TAP macrocycle.