Table 2  Ionization potential (IP), electron affinity (EA), electronegativity (X), chemical potential (μ), global hardness (ƞ), global softness (σ) and global electrophilicity (ω).

From: Exploration of the effect of multiple acceptor and π–spacer moieties coupled to indolonaphthyridine core for promising organic photovoltaic  properties: a first principles framework

Compounds

X

μ

ƞ

σ

ω

IP

EA

ΔNmax

INDTR

4.649

 − 4.649

1.144

0.437

9.446

5.793

3.505

4.064

INDTD1

4.636

 − 4.636

1.130

0.442

9.600

5.766

3.506

4.103

INDTD2

4.667

 − 4.667

1.128

0.443

9.657

5.794

3.539

4.137

INDTD3

4.698

 − 4.698

1.119

0.447

9.864

5.816

3.579

4.198

INDTD4

4.695

 − 4.695

1.119

0.447

9.849

5.814

3.576

4.196

INDTD5

4.799

 − 4.799

1.094

0.457

10.528

5.892

3.705

4.387

INDTD6

4.700

 − 4.700

1.117

0.448

9.888

5.817

3.583

4.208

INDTD7

4.807

 − 4.807

1.092

0.458

10.583

5.898

3.715

4.405

INDTD8

4.810

 − 4.810

1.095

0.457

10.564

5.905

3.715

4.393

  1. Units are in eV. Global softness (σ) in eV−1.