Figure 1: Chemical structures of GnB and calculated molecular orbitals of G2B and G3B.

(a) G2B-LUMO, (b) G2B-HOMO, (c) G3B-LUMO, (d) G3B-LUMO (density functional theory at CAM-B3LYP/6-31 G (d) level).
(a) G2B-LUMO, (b) G2B-HOMO, (c) G3B-LUMO, (d) G3B-LUMO (density functional theory at CAM-B3LYP/6-31 G (d) level).