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
• Languages of publication: EN

Abstracts

EN

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

EN

31.50.+w; 78.47.+p

• Journal: Acta Physica Polonica A
• Year: 1999
• Volume: 95
• Issue: 1
• Pages: 105-120

Dates

published

1999-01

Contributors

author

I. Yamazaki

• Graduate School of Molecular Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan

author

S. Akimoto

• Graduate School of Molecular Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan

author

T. Yamazaki

• Graduate School of Molecular Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan

author

H. Shiratori

• Graduate School of Chemistry, Kyoto University, Sakyo-ku, Kyoto 606-8224, Japan

author

A. Osuka

• Graduate School of Chemistry, Kyoto University, Sakyo-ku, Kyoto 606-8224, Japan

Identifiers

DOI

10.12693/APhysPolA.95.105