title: 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 S1energy 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 (4.83×1010s-1; 298 K), 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 (77 K). This selectivity is due to the difference in the J-integral being effective in both the Förster and Dexter mechanisms. The data are rationalized by DFT computations.
authors.affiliation: Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, J1K 2R1, Canada.
authors.forename: Adam
authors.initials: A
authors.lastname: Langlois
authors.affiliation: Université de Bourgogne Franche-Comté UBFC ICMUB, UMR CNRS 6302, 9, Avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France.|Present address: College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, P.R. China.
authors.forename: Hai-Jun
authors.initials: HJ
authors.lastname: Xu
authors.affiliation: Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, J1K 2R1, Canada.
authors.forename: Paul-Ludovic
authors.initials: PL
authors.lastname: Karsenti
authors.affiliation: Université de Bourgogne Franche-Comté UBFC ICMUB, UMR CNRS 6302, 9, Avenue Alain Savary, BP 47870, 21078, Dijon Cedex, France.
authors.forename: Claude P
authors.initials: CP
authors.lastname: Gros
authors.affiliation: Département de Chimie, Université de Sherbrooke, Sherbrooke, PQ, J1K 2R1, Canada.
authors.forename: Pierre D
authors.initials: PD
authors.lastname: Harvey
keywords: Dexter energy transfer; FRET; corroles; tautomerization; truxene