Investigation of ground- and excited-state photophysical properties of 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes

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dc.creatorSampaio, Renato Neiva
dc.creatorGomes, W. R.
dc.creatorAraujo, D. M. S.
dc.creatorMachado, Antônio Eduardo da Hora
dc.creatorSilva, Raigna Augusta da
dc.creatorMarletta, Alexandre
dc.creatorBorissevitch, Iouri
dc.creatorIto, Amando Siuiti
dc.creatorDinelli, Luís Rogério
dc.creatorBatista, Alzir Azevedo
dc.creatorGonçalves, Pablo José
dc.date.accessioned2024-07-08T11:46:21Z
dc.date.available2024-07-08T11:46:21Z
dc.date.issued2012
dc.description.abstractThe present work employs a set of complementary techniques to investigate the influence of outlying Ru(II) groups on the ground- and excited-state photophysical properties of free-base tetrapyridyl porphyrin (H2TPyP). Single pulse and pulse train Z-scan techniques used in association with laser flash photolysis, absorbance and fluorescence spectroscopy, and fluorescence decay measurements, allowed us to conclude that the presence of outlying Ru(II) groups causes significant changes on both electronic structure and vibrational properties of porphyrin. Such modifications take place mainly due to the activation of nonradiative decay channels responsible for the emission quenching, as well as by favoring some vibrational modes in the light absorption process. It is also observed that, differently from what happens when the Ru(II) is placed at the center of the macrocycle, the peripheral groups cause an increase of the intersystem crossing processes, probably due to the structural distortion of the ring that implies a worse spin–orbit coupling, responsible for the intersystem crossing mechanism.
dc.identifier.citationSAMPAIO, R. N. et al. Investigation of ground- and excited-state photophysical properties of 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes. Journal of Physical Chemistry A, Washington, v. 116, n. 1, p. 18-26, 2012. DOI: 10.1021/jp205963k. Disponível em: https://pubs.acs.org/doi/10.1021/jp205963k. Acesso em: 3 jul. 2024.
dc.identifier.doi10.1021/jp205963k
dc.identifier.issn1089-5639
dc.identifier.issne- 1520-5215
dc.identifier.urihttps://pubs.acs.org/doi/10.1021/jp205963k
dc.language.isoeng
dc.publisher.countryEstados unidos
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectAbsorption
dc.subjectEnergy levels
dc.subjectFluorescence
dc.subjectPyrroles
dc.subjectRuthenium
dc.titleInvestigation of ground- and excited-state photophysical properties of 5,10,15,20-Tetra(4-pyridyl)-21H,23H-porphyrin with ruthenium outlying complexes
dc.typeArtigo

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