Excited-state dynamics of meso-tetrakis(sulfonatophenyl) porphyrin J-aggregates
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
14/10/2013
14/10/2013
2012
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| Resumo |
The excited-state dynamics of free-base meso-tetrakis(sulfonatophenyl) porphyrin J-aggregates obtained by the Z-scan technique in femto- and picosecond time scales, along with UV-Vis spectroscopy and flash photolysis is reported. Besides obtaining the S-1 state lifetime, the discrimination between internal conversion and intersystem crossing nonradiative processes from that state was also possible, and their rates and respective quantum yields were found. The aggregates present reverse saturable absorption at 532 nm for both singlet and triplet excited states. The data shown is important for several applications such as optical limiting, photodynamic therapy and others. (C) 2011 Elsevier B.V. All rights reserved. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) |
| Identificador |
OPTICAL MATERIALS, AMSTERDAM, v. 34, n. 4, supl. 1, Part 6, pp. 741-747, FEB, 2012 0925-3467 http://www.producao.usp.br/handle/BDPI/34581 10.1016/j.optmat.2011.10.012 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCIENCE BV AMSTERDAM |
| Relação |
OPTICAL MATERIALS |
| Direitos |
closedAccess Copyright ELSEVIER SCIENCE BV |
| Palavras-Chave | #EXCITED STATES #NONLINEAR ABSORPTION #Z-SCAN #AGGREGATION #TRIPLET QUANTUM YIELD #TIME-RESOLVED FLUORESCENCE #OPTICAL NONLINEARITIES #TRANSIENT ABSORPTION #RELAXATION #SPECTROSCOPY #COMPLEXES #KINETICS #ARRAYS #FILMS #MATERIALS SCIENCE, MULTIDISCIPLINARY #OPTICS |
| Tipo |
article original article publishedVersion |
