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Study on nonlinear spectroscopy of tetraphenylporphyrin and dithiaporphyrin diacids

Authors :
Yi-Zhou Zhu
Jian-Yu Zheng
Zhi-Bo Liu
Jianguo Tian
Yan Zhu
Source :
The journal of physical chemistry. B. 111(51)
Publication Year :
2007

Abstract

The nonlinear absorption of two porphyrin diacids (H4TPP2+ and H2DSP2+), the diprotonated forms of free base tetraphenylporphyrin (H2TPP) and dithiaporphyrin (DSP), were studied in the wavelength range of 500-650 nm. The two porphyrin diacids exhibited perturbed static and dynamic characteristics and enhanced nonlinear absorption properties relative to their parent neutral complexes in solution. Furthermore, for the dithiaporphyrin diacid, the introduction of S-atoms into the porphyrin core makes it a better candidate for optical limiting relative to the simple porphyrin. Their photophysical parameters such as ground and excited states absorption cross-sections, together with fluorescence lifetime and intersystem crossing time, were determined.

Details

ISSN :
15206106
Volume :
111
Issue :
51
Database :
OpenAIRE
Journal :
The journal of physical chemistry. B
Accession number :
edsair.doi.dedup.....46518a442315dbed189471d40f086419