Ultrafast Energy Relaxation and Excitation Delocalization in Excited States of Zinc Porphyrin Dimers and Trimer

I. Yamazaki; S. Akimoto; T. Yamazaki; H. Shiratori; A. Osuka

doi:10.12693/APhysPolA.95.105

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Acta Physica Polonica A

1999 | 95 | 1 | 105-120

Article title

Ultrafast Energy Relaxation and Excitation Delocalization in Excited States of Zinc Porphyrin Dimers and Trimer

Authors

I. Yamazaki , S. Akimoto , T. Yamazaki , H. Shiratori , A. Osuka

Content

http://przyrbwn.icm.edu.pl/APP/PDF/95/a095z1p09.pdf [remote]

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Abstracts

Ultrafast excited-state relaxation process has been studied with zinc porphyrin dimers and circular trimer. Following 80 fs excitation at Soret band (420 nm) or Q band (580 nm) of zinc porphyrin, the fluorescence decay curves exhibit ultrafast decays with lifetimes of 80 fs in o-dimer, 450 fs in trimer and 540 fs in m-dimer. The timeresolved fluorescence spectra show that the fast decay process correspond to disappearance of monomer-like emission followed by red-shifted and broaden spectra. These ultrafast processes are assigned as due to excitation transfer among monomers and delocalization of excitation yielding excitonic states.

Keywords

31.50.+w 78.47.+p

Publisher

Institute of Physics, Polish Academy of Sciences

Journal

Acta Physica Polonica A

Year

1999

Volume

Issue

Pages

105-120

Physical description

Dates

published

1999-01

References

Document Type

Publication order reference

YADDA identifier

bwmeta1.element.bwnjournal-article-appv95z109kz

Identifiers

DOI

10.12693/APhysPolA.95.105