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Excited State N−H Tautomer Selectivity in the Singlet Energy Transfer of a Zinc(II)-Porphyrin-Truxene-Corrole Assembly

Abstract : An original corrole-containing polyad for S-1 energy transfer, in which one zinc(II)-porphyrin donor is linked to two free-base corrole acceptors by a truxene linker, is reported. This polyad exhibits a rapid zinc(II)-porphyrin*free-base corrole transfer (4.83x10(10)s(-1); 298K), even faster than the tautomerization in the excited state processes taking advantage of the good electronic communication provided by the truxene bridge. Importantly, the energy transfer process shows approximately 3-fold selectivity for one corrole N-H tautomer over the other even at low temperature (77K). This selectivity is due to the difference in the J-integral being effective in both the Forster and Dexter mechanisms. The data are rationalized by DFT computations.
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01559370
Contributeur : Icmub - Université de Bourgogne <>
Soumis le : lundi 10 juillet 2017 - 16:14:50
Dernière modification le : mardi 17 septembre 2019 - 11:02:05

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Adam Langlois, Hai-Jun Xu, Paul-Ludovic Karsenti, Claude P. Gros, Pierre D. Harvey. Excited State N−H Tautomer Selectivity in the Singlet Energy Transfer of a Zinc(II)-Porphyrin-Truxene-Corrole Assembly. Chemistry - A European Journal, Wiley-VCH Verlag, 2017, 23 (21), pp.5010 - 5022. ⟨10.1002/chem.201605909⟩. ⟨hal-01559370⟩

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