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- W2319322689 abstract "In this report we describe the synthesis of multichromophore arrays consisting of two Bodipy units axially bound to a Sn(IV) porphyrin center either via a phenolate (3) or via a carboxylate (6) functionality. Absorption spectra and electrochemical studies show that the Bodipy and porphyrin chromophores interact weakly in the ground state. However, steady-state emission and excitation spectra at room temperature reveal that fluorescence from both the Bodipy and the porphyrin of 3 are strongly quenched suggesting that, in the excited state, energy and/or electron transfer might occur. Indeed, as transient absorption experiments show, selective excitation of Bodipy in 3 results in a rapid decay (τ ≈ 2 ps) of the Bodipy-based singlet excited state and a concomitant rise of a charge-separated state evolving from the porphyrin-based singlet excited state. In contrast, room-temperature emission studies on 6 show strong quenching of the Bodipy-based fluorescence leading to sensitized emission from the porphyrin moiety due to a transduction of the singlet excited state energy from Bodipy to the porphyrin. Emission experiments at 77 K in frozen toluene reveal that the room-temperature electron transfer pathway observed in 3 is suppressed. Instead, Bodipy excitation in 3 and 6 results in population of the first singlet excited state of the porphyrin chromophore. Subsequently, intersystem crossing leads to the porphyrin-based triplet excited state." @default.
- W2319322689 created "2016-06-24" @default.
- W2319322689 creator A5009778363 @default.
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- W2319322689 creator A5049707925 @default.
- W2319322689 creator A5087876298 @default.
- W2319322689 creator A5090295400 @default.
- W2319322689 date "2012-03-16" @default.
- W2319322689 modified "2023-10-05" @default.
- W2319322689 title "Electron vs Energy Transfer in Arrays Featuring Two Bodipy Chromophores Axially Bound to a Sn(IV) Porphyrin via a Phenolate or Benzoate Bridge" @default.
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- W2319322689 doi "https://doi.org/10.1021/ic2026472" @default.
- W2319322689 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22424174" @default.
- W2319322689 hasPublicationYear "2012" @default.
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