Dynamic saturable optical nonlinearities in free base tetrapyridylporphyrin-Reference-Cited by-同舟云学术

Dynamic saturable optical nonlinearities in free base tetrapyridylporphyrin

Published:2003-06 Issue:06 Volume:07 Page:452-456
ISSN:1088-4246
Container-title:Journal of Porphyrins and Phthalocyanines
language:en
Short-container-title:J. Porphyrins Phthalocyanines

Author:

Neto Newton M. Barbosa¹,Boni Leonardo De¹,Rodrigues José J.¹,Misoguti Lino¹,Mendonça Cléber R.¹,Dinelli Luis R.²,Batista Alzir A.²,Zilio Sérgio C.¹

Affiliation:

1. Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil

2. Departamento de Química, Universidade Federal de São Carlos, BR-13565-905 São Carlos, SP, Brazil

Abstract

Dynamic optical nonlinearities in free base tetrapyridylporphyrin ( H 2 TPyP ) solutions were investigated at 532 nm with the Z-scan technique. We observed a reverse saturable absorption process that was found to have a fast contribution related to the singlet population and a slow accumulative contribution arising from the triplet population. The optical excitations and subsequent relaxations can be interpreted with a five-energy-level diagram that allows determination of the excited states photophysical parameters such as triplet and singlet absorption cross-sections and the intersystem crossing time.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Chemistry

Link

https://www.worldscientific.com/doi/pdf/10.1142/S1088424603000586

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