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Synthesis and photochemistry of a carotene–porphyrin–fullerene model photosynthetic reaction center
Author(s) -
Kodis Gerdenis,
Liddell Paul A.,
Moore Ana L.,
Moore Thomas A.,
Gust Devens
Publication year - 2004
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.787
Subject(s) - chemistry , porphyrin , photochemistry , photosynthetic reaction centre , photoinduced electron transfer , fullerene , electron transfer , electron acceptor , quantum yield , electron donor , yield (engineering) , carotene , triad (sociology) , organic chemistry , catalysis , fluorescence , psychology , physics , materials science , quantum mechanics , psychoanalysis , metallurgy
A new photosynthetic reaction center mimic consisting of a porphyrin (P) linked to both a fullerene electron acceptor (C 60 ) and a carotenoid secondary electron donor (C) was synthesized and studied in 2‐methyltetrahydrofuran using transient spectroscopic methods. Excitation of the porphyrin is followed by photoinduced electron transfer to the fullerene (τ = 32 ps) to yield C–P ·+ –C 60 ·− . Electron transfer from the carotene to the porphyrin radical cation (τ = 125 ps) gives a final C ·+ –P–C 60 ·− state with an overall yield of 0.95. This state decays to give the carotenoid triplet state with a time constant of 57 ns. The molecular triad is highly soluble in organic solvents and readily synthesized. These qualities make the molecule a useful artificial photosynthetic reaction center for a variety of spectroscopic and photochemical investigations. Copyright © 2004 John Wiley & Sons, Ltd.