2024-07-082024-07-082013BARBOSA NETO, N. M. et al. Excited states absorption spectra of porphyrins - solvent effects. Chemical Physics Letters, Amsterdam, v. 587, p. 118-123, 2013. DOI: 10.1016/j.cplett.2013.09.066. Disponível em: https://www.sciencedirect.com/science/article/pii/S0009261413012396. Acesso em: 3 jul. 2024.0009-2614e- 1873-4448https://www.sciencedirect.com/science/article/pii/S0009261413012396We propose a combination of different techniques to obtain the absorption cross-section spectra of triplet- and singlet-states in porphyrin-like molecules. Two extensions of the Z-scan technique are employed (pulse train Z-scan and white-light Z-scan) together with absorbance spectroscopy and laser flash photolysis. This approach allowed us to investigate features of excited-states absorption of meso-tetrakis (methylpyridiniumyl) porphyrin (TMPyP) that revealed the influence of solvents on the vibronic structuration of the transitions assigned to triplet-states, probably caused by hydrogen bonds established between the porphyrin and solvent molecules.engAcesso RestritoArtigo10.1016/j.cplett.2013.09.066