Fig. 5: Molecular orbitals of 2 (=AB) and its constituent subunits A and B.
From: Synthesis of a donor–acceptor heterodimer via trifunctional completive self-sorting

(GD3BJ-B3LYP/6–31G(d,p)). Arrows and adjacent labels correspond to key electronic transitions, their wavelengths (nm), and oscillator strengths. Transitions marked with * contain contributions of other excitations (see text).