Effect of Conformational Heterogeneity on Excitation Energy Transfer Efficiency in Directly meso − meso Linked Zn(II) Porphyrin Arrays

We have investigated the overall excitation energy relaxation dynamics in linear porphyrin arrays as well as the energy transport phenomena by attaching an energy acceptor to one end of a linear porphyrin array by using steady state and time-resolved spectroscopic measurements. We have revealed that...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2005-06, Vol.109 (22), p.11223-11230
Main Authors: Ahn, Tae Kyu, Yoon, Zin Seok, Hwang, In-Wook, Lim, Jong Kuk, Rhee, Hanju, Joo, Taiha, Sim, Eunji, Kim, Seong Keun, Aratani, Naoki, Osuka, Atsuhiro, Kim, Dongho
Format: Article
Language:English
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Summary:We have investigated the overall excitation energy relaxation dynamics in linear porphyrin arrays as well as the energy transport phenomena by attaching an energy acceptor to one end of a linear porphyrin array by using steady state and time-resolved spectroscopic measurements. We have revealed that the solvation dynamics as well as the conformational dynamics contributes significantly to the energy relaxation processes of linear porphyrin arrays. Consequently, long porphyrin arrays no longer serve as good energy transmission elements in donor−acceptor linked systems due to conformational heterogeneities which provide the nonradiative deactivation channels as energy quenchers.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp050662g