Table 4 Optical band-gap energy and some optical parameters of mixed ligand complexes.

From: Synthesis, structural characterization, and antimicrobial evaluation of new mononuclear mixed ligand complexes based on furfural-type imine ligand, and 2,2′-bipyridine

Mixed ligand complexes

Tauc’s relation

ASF method

Ee (eV)

Eu (eV)

Parameters

Egd (eV)

Egi (eV)

EgASF (eV)

EgASF (eV)

n

σs

[FeL(bpy)]Cl3·H2O

3.65

2.39

3.41

2.39

3.94

0.25

2.22

0.09

[CoL(bpy)]Cl2·3H2O

3.21

2.6

3.22

2.60

3.46

0.23

2.35

0.10

[CuL(bpy)]Cl2

4.52

2.98

4.53

2.98

4.59

0.81

2.06

0.02

[CdL(bpy)](NO3)2

3.10

3.27

3.14

3.25

3.34

0.24

2.38

0.09

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