Absorption analysis parameters, i.e., excitation energies (ΔE), absorption maxima (λ_max) and oscillator strength (f_o) for the Al₁₂N₁₂@S-belt, Mg₁₂O₁₂@S-belt, and B₁₂P₁₂@S-belt complexes.

Compounds	ΔE (eV)	λ max (nm)	f o (a.u)
S-belt	5.04	246	1.62
Al12N12	5.56	223	0.10
Al12N12@S-belt	4.89	254	0.52
Mg12O12	5.66	219	0.44
Mg12O12@S-belt	4.93	251	0.99
B12P12	4.24	292	0.06
B12P12@S-belt	4.08	304	0.03