963068.fig.004a
(a)
963068.fig.004b
(b)
963068.fig.004c
(c)
963068.fig.004d
(d)
963068.fig.004e
(e)
963068.fig.004f
(f)
963068.fig.004g
(g)
963068.fig.004h
(h)
963068.fig.004i
(i)
963068.fig.004j
(j)
Figure 4: Frontier molecular orbitals of 4,4′-bis(9,9-dibutyl-7-(3,6-di-tert-butyl-9H-carbazol-9-yl)-9H-fluoren-2-yl)-2,2′-bipyridine (L1); (a) LUMO+4; (b) LUMO+3; (c) LUMO+2; (d) LUMO+1; (e) LUMO; (f) HOMO; (g) HOMO−1; (h) HOMO−2; (i) HOMO−3; (j) HOMO−4.