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(a) Types of linear porphyrin–porphyrin connection. Zn–Zn distances and dihedral angles θ (measured from the carbon atoms indicated by blue circles from density functional theory (DFT)-optimized geometries). (b–e) Calculated geometries of c-P6, c-P6·T6, c-P8 and c-P8·(T4)2. Two orthogonal views are shown for each structure. Solubilizing aryl groups and hydrogen atoms are omitted for clarity. (B3LYP/6-31G*; see SI for details.).
