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Electron and energy transfer in a porphyrin–oxoporphyrinogen–fullerene triad, ZnP–OxP–C 60
Ist Teil von
Physical chemistry chemical physics : PCCP, 2020-07, Vol.22 (25), p.14356-14363
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A multichromophoric triad,
ZnP–OxP–C60
containing porphyrin (
ZnTPP
hereafter
ZnP
), oxoporphyrinogen (
OxP
) and fullerene (
C60
) has been synthesized to probe the intramolecular dynamics of its electron and energy transfer in relation to the presence of the closely linked electron deficient
OxP–C60
‘special pair’, constructed as a mimic of the naturally occurring photosynthetic antenna-reaction center. The DFT optimized structure of the triad reveals the relative spatial remoteness of the
ZnP
entity with proximal
OxP
/
C60
entities. Free-energetics of different energy and electron transfer events were estimated using spectral, computational and electrochemical studies, according to the Rehm–Weller approach. Femtosecond transient absorption spectral studies revealed energy transfer from
1ZnP*
to
OxP
to yield
ZnP–1OxP*–C60
, and electron transfer to yield
ZnP˙+–OxP–C60˙−
and/or
ZnP–OxP˙+–C60˙−
charge seperated states. That is, the
ZnP
entity in the triad operates as both antenna and electron donor to generate relatively long-lived charge separated states thus mimicking the early photoevents of natural photosynthesis.
Sprache
Englisch
Identifikatoren
ISSN: 1463-9076
eISSN: 1463-9084
DOI: 10.1039/D0CP02696D
Titel-ID: cdi_crossref_primary_10_1039_D0CP02696D
Format
–
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