Time resolved fluorescence spectroscopy was carried out on porphyrin-based artificial light harvesting molecules (ALHM). The ALHMs are dyads consisting of zinc-tetraphenylporphyrin (Zn-TPP) as an antenna complex and a freebase tetraphenylporphyrin (TPP) as an energy trap. Both chromophores are covalently bound by a steroidal bridge in different configurations. We have observed energy transfer in the ALHMs with transfer times on the order of approximately 1 ns. We have also compared the energy transfer dynamics of these ALHMs differing in the link between the energy donor and the energy trap. Only when connected by a chemical bond does energy transfer from Zn-TPP to TPP occur. A spread in the energy transfer times was found which is attributed to the different configurations of the ALHMs under study.
|Autori interni:||PESCITELLI, GENNARO|
|Autori:||HAUSCHILD R; RIEDEL G; ZELLER J; BALABAN TS; PROKHORENKO VI; KALT H; BEROVA N; HUANG X; PESCITELLI G; NAKANISHI K|
|Titolo:||Comparative Study of Energy-Transfer Processes in Several Porphyrin-Based Artificial Light-Harvesting Complexes|
|Anno del prodotto:||2005|
|Digital Object Identifier (DOI):||10.1016/j.jlumin.2004.09.071|
|Appare nelle tipologie:||1.1 Articolo in rivista|