Angewandte Chemie,
Год журнала:
2024,
Номер
136(42)
Опубликована: Июль 16, 2024
Abstract
Circularly
polarized
electroluminescence
(CPEL)
is
highly
promising
in
realm
of
3D
display
and
optical
data
storage.
However,
designing
a
groundbreaking
chiral
material
with
high
comprehensive
CPEL
performance
remains
formidable
challenge.
In
this
work,
pair
polymers
self‐assembled
behavior
designed
by
integrating
BN‐moiety
into
polyfluorene
backbone,
named
R‐PBN
S‐PBN
,
respectively.
The
show
narrowband
emission
centered
at
490
nm
full‐width
half
maximum
(FWHM)
29
photoluminescence
quantum
yield
(PLQY)
79
%.
After
thermal
annealing
treatment,
the
undergo
self‐assembly,
exhibiting
amplified
circularly
luminescence
(CPL)
asymmetry
factor
(|
g
lum
|)
up
to
0.11.
Moreover,
solution‐processed
nondoped
CP‐OLEDs
based
on
as
emitting
layers
exhibit
external
efficiency
(EQE
max
)
9.8
%,
intense
activities
|
EL
0.07,
small
FWHM
36
nm,
simultaneously.
This
represents
first
case
that
combines
EQE,
large
value
emission.
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 17, 2024
Abstract
Circularly
polarized
luminescence
(CPL)
of
chiral
luminescent
materials
has
gained
increasing
attention
because
their
significant
applications
in
3D
displays,
optoelectronics,
anti‐counterfeiting,
and
encryption.
A
strongly
emissive
dye
BAcT
is
synthesized
using
(
R
)‐BINOL
as
the
source
a
tetraphenylethene
group
fluorophore.
Upon
addition
to
nematic
liquid
crystal,
left‐handed
cholesteric
structure
induced.
Different
concentrations
/
S
5011
co‐dopants
are
added
prepare
series
structurally
colored
crystal
polymer
network
(CLCN)
films.
CPL
bands
detected
for
these
green
CLCN
films,
relatively
high
|
g
lum
values
(up
0.48)
obtained.
Furthermore,
fluorescent
PMMA‐BAcT
layer
prepared
by
embedding
PMMA
matrix
stacked
with
construct
composite
film.
Because
filtering
effect
film,
value
up
1.41
successfully
achieved.
Colorful
patterns
prepared,
clear
pictures
observed
both
reflective
modes,
contributing
optical
anti‐counterfeiting
enhanced
security.
This
work
not
only
provides
deeper
understanding
CPL,
but
also
establishes
practical
strategy
colorful
inkjet
printing
technology.
Materials Horizons,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Circularly
polarized
luminescence
(CPL)
materials
have
developed
rapidly
in
recent
years
due
to
their
wide
application
prospects
fields
like
3D
displays
and
anti-counterfeiting.
Utilizing
energy
transfer
processes
chirality
has
been
proven
as
an
efficient
way
obtain
CPL
materials.
However,
the
physics
behind
energy-transfer
induced
is
still
not
clear.
Herein,
a
well-designed
heteronuclear
CeIII-MnII
complex
system
[(Ce((R/S)-L)Br(μ-Br))2]MnBr4
[(R/S)-L
=
(2R,3R)-
or
(2S,3S)-2,3-dimethyl-1,4,7,10,13,16-hexaoxacyclooctadecane]
with
intra
from
CeIII
MnII,
dissymmetry
factor
of
MnII
obtained
by
excitation
around
10
times
higher
than
that
direct
while
center
itself
shows
almost
negligible
CPL.
To
address
this
unusual
phenomenon,
we
proposed
new
mechanism
named
structural
relaxation
(SRCT)
where
excited
chiral
donor
amplified
acceptor
intramolecular
interactions.
As
assistant
proof,
mixture
CeIII-ZnII
LaIII-MnII
complexes
inter
showed
no
amplification.
These
results
will
inspire
more
breakthroughs
nature
development
Nature Communications,
Год журнала:
2025,
Номер
16(1)
Опубликована: Март 26, 2025
Circularly
polarized
luminescence
(CPL)
in
solution
offers
several
advantages.
However,
it
remains
challenging
for
organic
molecules
to
achieve
circularly
with
high
dissymmetry
factor
(glum)
solution.
Herein,
a
general
strategy
is
developed
by
placing
chiral
nematic
liquid
crystals
(N*-LCs)
behind
the
of
achiral
molecules.
The
selective
reflection-transmission
mechanism
solution-N*-LC
composite
system
enables
generation
full-color
and
white
light
|glum|
even
reaching
2.0.
This
demonstrates
versatility,
being
applicable
both
aqueous
solutions,
effectively
achieving
multiple
glum
values.
Additionally,
CPL
switching
logic
gate
applications
are
successfully
realized
leveraging
N*-LCs
reversible
acid-base
responsiveness
systems.
work
provides
robust
values
solutions.
advantages,
however,
factors
Here,
authors
report
using
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 7, 2025
Circularly
polarized
organic
light-emitting
diodes
(CP-OLEDs)
and
CP
photodetectors
have
received
enormous
attention
owing
to
their
promising
potential
in
light-related
technologies.
The
simultaneous
construction
of
efficient
CP-OLEDs
using
the
multifunctionality
same
chiral
material
remains
be
explored.
Herein,
achiral
conjugated
polymer
poly(9,9-dioctylfluorene)
(PFO)
is
used
for
coassembly
with
helical
polyacetylenes.
resulting
emitters
can
achieve
high-performance
circularly
electroluminescence
(CPEL)
a
large
dissymmetry
factor
(gEL)
0.11
high
brightness
9035
cd
m-2.
By
introducing
flexible
substrate
into
device,
are
realized.
Additionally,
such
serve
as
photoactive
layer
photodetector
detect
light,
maximum
photocurrent
(gph)
order
10-1.
This
work
provides
route
realize
factors
polyfluorene
polymer,
facilitating
comprehensive
versatile
development.
Abstract
Multiplexed
optical
imaging
is
highly
desirable
for
enhancing
information
security.
However,
shaping
optically
active
materials
with
circularly
polarized
long
afterglow
(CPLA)
into
3D
geometric
structures
multiplexing
stereoscopic
display
and
multidirectional
encryption
remains
a
significant
challenge.
Herein,
novel
strategy
proposed
designing
multiplexed
patterns
using
twisted‐stacking
hierarchical
that
exhibit
remarkable
activity
CPLA
properties.
The
hybrid
films
dynamically
orthogonal
control
of
transmission
in
daylight
switchable
images
darkness,
both
which
can
be
directly
viewed
by
the
naked
eye
left‐
or
right‐handed
filters,
independently
modulated
without
mutual
interference
during
dynamic
regulation
process.
Furthermore,
it
demonstrated
this
integrated
platform
utilized
as
multimodal
image
toward
advanced
anti‐counterfeiting
applications.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 24, 2025
Chiral
induction
of
polyfluorene
(PF)-containing
block
copolymers
plays
a
crucial
role
in
the
development
advanced
functional
materials;
however,
research
this
area
remains
scarce.
In
contribution,
PFO-b-PPI
diblock
comprising
blocks
poly(9,9-dioctylfluorene)
(PFO)
and
poly(phenyl
isocyanide)
(PPI)
were
readily
synthesized
one
pot
by
combining
chain-growth
Suzuki
cross-coupling
polymerization
modified
9,9-dioctylfluorene
monomer
with
Pd(II)-catalyzed
phenyl
isocyanide
bearing
pentafluorophenyl
ester
substitute.
The
obtained
possessed
controlled
molar
mass
(Mn)
narrow
dispersity
(Mw/Mn,
Đ).
Meanwhile,
optically
active
supramolecular
assemblies
could
be
formed
via
coassembly
chiral
binaphthyl-based
inducer
film
state
after
thermal
annealing
treatment,
chirality
was
influenced
temperature
weight
ratio
copolymer
to
inducer,
thickness
film.
Further
investigations
revealed
that
exhibited
morphology
single-handed
helical
nanofibers,
sense
nanofibers
depended
on
configuration
inducer.
Moreover,
excellent
circularly
polarized
luminescence
(CPL)
performance
glum
as
high
0.11.
Proceedings of the National Academy of Sciences,
Год журнала:
2025,
Номер
122(18)
Опубликована: Апрель 29, 2025
Materials
with
pure
organic
circularly
polarized
afterglow
(CPA)
have
attracted
significant
attention
due
to
their
spatiotemporal-resolved
optical
properties,
yet
achieving
simultaneous
high
dissymmetry
factor
(glum)
and
multicolor
ultralong
emission
remains
a
challenge.
Here,
we
establish
universal
energy
transfer-photon
coupling
strategy
realize
CPA
spanning
from
blue
red
record-high
glum
(up
1.90)
lifetimes
(>6
s).
Systematic
characterization
of
nonchiral
donor–acceptor
systems
(TP-BPEA,
TP-Fluo,
etc.)
reveals
the
absence
ground-state
chiral
centers
(
g
CD
≈
0)
orientation
artifacts
LD
<
10
−7
),
confirming
key
role
cholesteric
liquid
crystal
polymer
in
chirality
induction.
This
spatiotemporal
synergy
between
transfer
(wavelength
modulation)
photonic
engineering
(polarization
control)
provides
framework
for
materials,
potential
implications
multidimensional
information
encryption.