Antenna effects in truxene-bridged BODIPY triarylzinc(II)porphyrin dyads: evidence for a dual Dexter-Förster mechanism

The antenna process from an energy donor (BODIPY; 4',4'-difluoro-1',3',5',7'-tetramethyl-4'-bora-3a',4a'-diaza-s-indacene) in its singlet state to two acceptors (two zinc(II) 5,15-p-tolyl-10-phenylporphyrin) bridged by a central truxene residue (5',5...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2014-06, Vol.43 (22), p.8219-8229
Main Authors: Xu, Hai-Jun, Bonnot, Antoine, Karsenti, Paul-Ludovic, Langlois, Adam, Abdelhameed, Mohammed, Barbe, Jean-Michel, Gros, Claude P, Harvey, Pierre D
Format: Article
Language:English
Subjects:
Antennas
Approximation
Conjugation
Energy transfer
Energy use
Fretting
Mathematical analysis
Residues
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Summary:The antenna process from an energy donor (BODIPY; 4',4'-difluoro-1',3',5',7'-tetramethyl-4'-bora-3a',4a'-diaza-s-indacene) in its singlet state to two acceptors (two zinc(II) 5,15-p-tolyl-10-phenylporphyrin) bridged by a central truxene residue (5',5'',10',10'',15',15''-hexabutyltruxene), 5, has been analysed by means of comparison of the energy transfer rates with those of a structurally similar β-substituted BODIPY-(zinc(II) 5,10,15-p-tolyl-porphyrin), 6, where no conjugation is present between the donor and the two acceptors using the Förster resonance energy transfer (FRET) approximation. It is estimated that the energy transfer in operates mostly via a Dexter mechanism (>99%), and the remaining proceeds via a Förster mechanism (
ISSN:1477-9226
1477-9234
DOI:10.1039/c3dt53630k