An electrochromic device based on dynamic coordination and the dissociation of Fe2+/Fe3+ and a leuco dye with an improved cycle life
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Electrochromic
device
based
Fe
n
+
and
a
leuco
dye
has
been
fabricated,
which
shows
satisfying
cycle
life
optical
modulate
ability.
This
strategy
to
improve
may
accelerate
the
application
of
electrochromic
devices.
Язык: Английский
Hydrogen-bonded green box-based host-guest complexes on g-C3N4 composites for enhanced visible-light photocatalysis
Science China Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 31, 2025
Язык: Английский
Directional Electron Flow in a Selenoviologen‐Based Tetracationic Cyclophane for Enhanced Visible‐Light‐Driven Hydrogen Evolution
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(47)
Опубликована: Июль 23, 2024
Abstract
Directional
electron
flow
in
the
photocatalyst
enables
efficient
charge
separation,
which
is
essential
for
photocatalysis
of
H
2
production.
Here,
we
report
a
novel
class
tetracationic
cyclophanes
(
7
)
incorporating
bipyridine
Pt(II)
and
selenoviologen.
X‐ray
single‐crystal
structures
reveal
that
not
only
fixes
distances
spatial
positions
between
its
individual
units
but
also
exhibits
box‐like
rigid
electron‐deficient
cavity.
Moreover,
host–guest
recognition
phenomena
are
observed
ferrocene,
forming
complexes
with
1
:
stoichiometry.
good
redox
properties,
narrow
energy
gaps,
strong
absorption
visible
range
(370–500
nm)
due
to
containing
two
selenoviologen
(SeV
2+
units.
Meanwhile,
femtosecond
transient
(fs‐TA)
reveals
has
stabilized
dicationic
biradical,
facilitates
directional
achieve
transfer
formation
cyclophane
electronic
architecture.
Then,
applied
visible‐light‐driven
hydrogen
evolution
high
production
(132
μmol),
generation
rate
(11
μmol/h),
turnover
number
(221),
apparent
quantum
yield
(1.7
%),
provides
simplified
photocatalytic
strategy
solar
conversion.
Язык: Английский
A Triphasic Membrane-Free Redox Flow Battery in a Total Aqueous System
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 28, 2024
The
membrane-free
redox
flow
battery
(RFB)
represents
an
innovative
design
philosophy
that
encompasses
reduced
costs,
flexible
schemes,
and
enhanced
overall
performance.
However,
despite
these
advantages,
RFBs
encounter
several
challenges
including
low
Coulombic
efficiency
(CE),
limited
cycling
stability,
elevated
toxicity
from
organic
solvents.
Aiming
at
issues,
we
constructed
a
triphasic
RFB
using
total
aqueous
system.
electrolytes
for
both
the
anolyte
catholyte
are
extracted
tetrabutylammonium
chloride-Na2SO4–H2O
salting-out
system,
while
other
phase
serves
as
separator.
A
novel
material,
N,N′-di(ethyl
butyrate)-4,4′-bipyridinium
dichloride,
significantly
boosts
performance
when
paired
with
2,2,6,6-tetramethylpiperidine-N-oxyl-4-sulfate
potassium
catholyte.
Our
static
delivers
open-circuit
voltage
of
1.24
V,
demonstrating
stable
energy
capacity
loss
0.064%
per
hour
average
CE
98.6%
over
493
h
(345
cycles).
Furthermore,
have
conducted
preliminary
construction
exhibited
efficiency,
decay
0.035%
cycle
98.7%.
These
results
provide
promising
evidence
supporting
feasibility
this
all-aqueous
RFB.
We
also
identify
primary
intermediate
species
following
extended
elucidate
two
potential
degradation
pathways
material.
anticipate
combined
our
scheme
comprehensive
mechanistic
analysis,
will
expand
research
scope
RFBs.
Язык: Английский
Donor–Acceptor Viologens with Through‐Space Conjugation for Enhanced Visible‐Light‐Driven Photocatalysis
Advanced Science,
Год журнала:
2024,
Номер
12(2)
Опубликована: Ноя. 21, 2024
Abstract
A
series
of
novel
donor–acceptor
(D–A)
type
viologens
with
through‐space
conjugation
(TSC)
are
synthesized.
The
synergistic
effect
D–A
and
TSC
endow
these
compounds
a
narrower
energy
gap,
excellent
redox
properties,
strong
absorption
in
the
visible
range
(up
to
450
nm),
high
efficiency
intramolecular
charge
transfer
(ICT).
These
also
exhibit
long‐lived
separation
state
stable
radical
formation.
Considering
their
impressive
photophysical
explored
for
visible‐light‐driven
photocatalysis.
As
catalyst
oxidative
coupling
reactions
under
light,
compound
9
can
achieve
yield
94%,
attributed
its
ICT
effect.
Additionally,
hybridized
into
graphitic
carbon
nitride
(g‐C₃N₄),
enhances
hydrogen
production
performance
achieving
an
H
2
generation
rate
4102
µmol
h
−1
g
.
This
study
highlights
potential
applications
photocatalytic
systems.
Язык: Английский
Directional Electron Flow in a Selenoviologen‐Based Tetracationic Cyclophane for Enhanced Visible‐Light‐Driven Hydrogen Evolution
Angewandte Chemie,
Год журнала:
2024,
Номер
136(47)
Опубликована: Июль 23, 2024
Abstract
Directional
electron
flow
in
the
photocatalyst
enables
efficient
charge
separation,
which
is
essential
for
photocatalysis
of
H
2
production.
Here,
we
report
a
novel
class
tetracationic
cyclophanes
(
7
)
incorporating
bipyridine
Pt(II)
and
selenoviologen.
X‐ray
single‐crystal
structures
reveal
that
not
only
fixes
distances
spatial
positions
between
its
individual
units
but
also
exhibits
box‐like
rigid
electron‐deficient
cavity.
Moreover,
host–guest
recognition
phenomena
are
observed
ferrocene,
forming
complexes
with
1
:
stoichiometry.
good
redox
properties,
narrow
energy
gaps,
strong
absorption
visible
range
(370–500
nm)
due
to
containing
two
selenoviologen
(SeV
2+
units.
Meanwhile,
femtosecond
transient
(fs‐TA)
reveals
has
stabilized
dicationic
biradical,
facilitates
directional
achieve
transfer
formation
cyclophane
electronic
architecture.
Then,
applied
visible‐light‐driven
hydrogen
evolution
high
production
(132
μmol),
generation
rate
(11
μmol/h),
turnover
number
(221),
apparent
quantum
yield
(1.7
%),
provides
simplified
photocatalytic
strategy
solar
conversion.
Язык: Английский