Issue 46, 2019

Light-harvesting porphyrazines to enable intramolecular singlet fission

Abstract

A porphyrazine featuring complementary absorption to a pentacene dimer was chosen to fill the absorption gap of the latter in the range of 450 to 600 nm to realize panchromatic absorption through the visible region out to ca. 700 nm. Of even greater relevance is the quantitative intramolecular Förster resonance energy transfer (i-FRET) to funnel energy to the pentacene moieties, where efficient intramolecular singlet fission (i-SF) converts the singlet excited state into the corresponding triplet excited states. Remarkably, the triplet quantum yield either via direct excitation or via indirect i-FRET is up to 200% ± 20% in polar solvents.

Graphical abstract: Light-harvesting porphyrazines to enable intramolecular singlet fission

Supplementary files

Article information

Article type
Paper
Submitted
22 Sept. 2019
Accepted
31 Okt. 2019
First published
31 Okt. 2019

Nanoscale, 2019,11, 22286-22292

Light-harvesting porphyrazines to enable intramolecular singlet fission

D. Medina, I. Papadopoulos, G. Lavarda, H. Gotfredsen, P. R. Rami, R. R. Tykwinski, M. S. Rodríguez-Morgade, D. M. Guldi and T. Torres, Nanoscale, 2019, 11, 22286 DOI: 10.1039/C9NR08161E

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