Table 2. HOMO LUMO Energy and Energy Gap for PFDs.

sr. no.	compound no.	HOMO energy	LUMO energy	energy gap (eV)
1	Va	–0.18309	–0.04946	0.13363
2	Vb	–0.18246	–0.04272	0.13974
3	Vc	–0.18182	–0.04885	0.13332
4	Vd	–0.18526	–0.05467	0.13059
5	Ve	–0.1884	–0.06206	0.12634