fig3

Figure 3. (A) UV‒Vis-NIR absorption spectra of 1, 3a, 5a, 5d and 5j; (B) Calculated HOMO and LUMO energy levels; (C) Thermal stability of complexes 1, 3a, 5a, 5d and 5j in the solid-state after heating at different temperatures in air for 3 h. ● = stable, ▲ = partly decomposed, ■ = completely decomposed; (D) Photothermal conversion of 5j (0.100 mg/mL in CH₃CN) under 808 nm (1.00 W/cm²) laser irradiation. HOMO: Highest Occupied Molecular Orbital; LUMO: Lowest Unoccupied Molecular Orbital. (Figure 3A-D is reproduced with permission^[22]. Copyright 2025, American Chemical Society).