Table 2 Values of the energy gap, Eg, and Urbach energy, EU, of I-6, I-8, and I-12 derivatives in liquid crystal phase designed at 140 °C.

From: Optical investigations and photoactive solar energy applications of new synthesized Schiff base liquid crystal derivatives

Compound

Eg (eV)

Eu (eV) ± SD

R2

I-12

1.13

0.956 ± 0.010

0.9988

3.14

0.629 ± 0.040

0.9984

I-8

1.09

0.634 ± 0.006

0.9984

3.55

0.539 ± 0.007

0.9985

I-6

1.07

0.857 ± 0.009

0.9988

2.79

0.990 ± 0.009

0.9994

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