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. 2019 Oct 24;24(21):3831. doi: 10.3390/molecules24213831

Table 2.

Total molecular energy and frontier orbital energy.

Thermodynamic Parameters (298 K) Indigo Indirubin
ELUMO+1 (eV) −1.3851 −1.0014
ELUMO (eV) −3.0014 −2.9769
EHOMO (eV) −5.5049 −5.7280
EHOMO−1 (eV) −6.5062 −6.3267
ΔELUMO−HOMO (eV) 2.5035 2.7511