Decoupling Electronic Coupling and Site-Energy Asymmetry in a Scaffold-Free π-Assembly
In conventional π-stacked systems, electronic coupling (J) and site-energy asymmetry (Δε) are governed by the same structural coordinate. Co-facial packing maximizes J but enforces Δε ≈ 0, yielding symmetry-equivalent local-excitation-charge-transfer (LE-CT) manifolds near the charge-resonance/excimer limit, whereas...