Each spectrum shows three main regions: (i) an intense absorption band within 380-420 nm (Soret-band region), (ii) a series of moderately intense bands with a vibronic structure within 400-550 nm (Q-band region), and (iii) a very weak and broad absorption extending into the 600-1000 nm range (near-IR region). This long-wavelength absorption is attributed to the symmetry-forbidden HOMO-LUMO transition characteristic to antiaromatic compounds with narrow energy gaps. Notably, the spectral features of 1c showed the most pronounced broadening and bathochromic shifts, followed by 1b, whereas 1a exhibited the sharpest and most blue-shifted absorption bands.