Two Birds, One Stone: Microsecond Dark Excited-State Lifetime and Large Cage Escape Yield Afforded by an Iron–Anthracene Molecular Dyad
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 28, 2025
Iron
photosensitizers
represent
a
holy
grail
in
photochemistry,
but
their
widespread
implementation
is
limited
by
short
excited-state
lifetimes
and
poor
cage
escape
yields.
Here,
the
introduction
of
an
anthracene
moiety
appended
to
iron(III)
complex
allowed
solve
both
limitations
generate
novel
dyad
exhibiting
extraordinary
lifetime
11.5
μs.
The
key
achieving
this
remarkably
long
depopulation
short-lived
iron-centered
emissive
excited
state
populate
dark
triplet
located
on
anthracene-like
with
spin-forbidden
deactivation.
Population
only
occurs
∼10%
efficiency
acetonitrile
still
allows
expansion
scope
reactivity
accessible
iron-based
photosensitizers,
which
now
encompasses
energy
transfer
3O2.
In
addition,
proof-of-principle
investigation
methyl
viologen
as
electron
acceptor,
population
drastic
ten-fold
increase
yield
from
4.5%
for
unsubstituted
42%
molecular
dyad.
Hence,
new
provides
complementary
approach
complexes
based
first-row
transition
metals
alternatives
well-established
analogues
precious
metals.
We
believe
that
further
spectroscopic
investigations
synthetic
modifications
acceptor
linkage
photosensitizer
will
be
use
these
innovative
dyads
applications
near
future.
Язык: Английский
From photons to reactions: key concepts in photoredox catalysis
Chem Catalysis,
Год журнала:
2024,
Номер
unknown, С. 101110 - 101110
Опубликована: Сен. 1, 2024
Язык: Английский
Luminescent Fe(III) Complex Sensitizes Aerobic Photon Upconversion and Initiates Photocatalytic Radical Polymerization
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 10, 2024
Light
energy
conversion
often
relies
on
photosensitizers
with
long-lived
excited
states,
which
are
mostly
made
of
precious
metals
such
as
ruthenium
or
iridium.
Photoactive
complexes
based
highly
abundant
iron
seem
attractive
for
sustainable
conversion,
but
this
remains
very
challenging
due
to
the
short
state
lifetimes
current
complexes.
This
study
shows
that
a
luminescent
Fe(III)
complex
sensitizes
triplet-triplet
annihilation
upconversion
anthracene
derivatives
via
underexplored
doublet-triplet
transfer,
is
assisted
by
preassociation
between
photosensitizer
and
annihilator.
In
presence
an
organic
mediator,
green-to-blue
efficiency
Φ
Язык: Английский
Exploring the Impact of Water Content in Solvent Systems on Photochemical CO2 Reduction Catalyzed by Ruthenium Complexes
Molecules,
Год журнала:
2024,
Номер
29(20), С. 4960 - 4960
Опубликована: Окт. 20, 2024
To
achieve
artificial
photosynthesis,
it
is
crucial
to
develop
a
catalytic
system
for
CO
Язык: Английский