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Porphyrin‐Ryleneimide Hybrids: Low‐Bandgap Acceptors in Energy‐Transfer Cassettes
Author(s) -
Janiga Ewelina,
Kim Gakhyun,
Chmielewski Piotr J.,
Lis Tadeusz,
Kim Dongho,
Stępień Marcin
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000762
Subject(s) - acceptor , porphyrin , fluorescence , femtosecond , photochemistry , ultrafast laser spectroscopy , bodipy , excitation , förster resonance energy transfer , energy transfer , absorption (acoustics) , materials science , band gap , chemistry , optoelectronics , chemical physics , optics , laser , physics , quantum mechanics , composite material , condensed matter physics
Energy‐transfer cassettes consisting of naphthaleneimide‐fused metalloporphyrin acceptors (M=Zn and Pd) and BODIPY donors have been designed and synthesized. These systems have rigid pseudo‐tetrahedral structures with a donor‐acceptor separation of ca. 17.5 Å. Spectroscopic investigations, including femtosecond transient absorption measurements, showed efficient excitation energy transfer (EET) occurring according to the Förster mechanism. Strong fluorescence of the donor units and significant spectral overlap of the donor and acceptor subunits are prerequisites for the efficient EET in these systems.