Advanced Optical Materials,
Год журнала:
2024,
Номер
12(20)
Опубликована: Июнь 10, 2024
Abstract
Supramolecular
polymers
with
circularly
polarized
luminescence
(CPL)
have
promoted
future
intelligence
development
of
polymer‐based
materials
for
flexible
display.
However,
preparing
CPL
simultaneous
enhanced
dissymmetry
factor
(|
g
lum
|)
and
mechanical
performance
industrial
applications
remains
challenging.
This
work
develops
an
eco‐friendly
preparation
method
elastomers
from
supramolecular
polyurethanes
bearing
chiral
fluorescent
S
(or
R)‐1,1′‐Bi(2‐naphthol)
(BINOL)
groups
in
a
solvent‐free
system.
Surprisingly,
polymer
system
containing
0.0028
mol%
BINOL
unit
is
sufficient
to
emit
the
significant
CPL‐activity
|
value
2.30
×
10
−2
,
appear
good
toughness
56.28
±
3.9
MJ·m
−3
thereby
exhibit
multiple
anti‐counterfeiting
behaviors.
The
long‐range
ordered
microphase
arrangement
key
improving
both
properties
|.
attributed
in‐situ
additive
polymerization
BINOL‐based
isocyanate
prepolymer
macromolecular
polyols
induced
helical
structure,
afforded
solid‐state
films
flexibility
amplification.
Furthermore,
these
results
Circular
dichroism,
CPL,
Fourier
transform
infrared,
X‐ray
diffraction
analyses,
atomic
force
microscope
confirm
formation
through
synergistic
effect
hydrogen
bonding
π–π
interactions.
offers
insights
into
construction
developing
novel
display
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(22)
Опубликована: Март 25, 2024
Abstract
Endowing
perovskite
quantum
dots
(PQDs)
with
circularly
polarized
luminescence
(CPL)
offers
great
promise
for
innovative
chiroptical
applications,
but
the
existing
strategies
are
inefficient
in
acquiring
stimuli‐responsive
flexible
chiral
films
large,
tunable
dissymmetry
factor
(
g
lum
)
and
long‐term
stability.
Here,
we
report
a
strategy
design
synthesis
of
luminescent
cholesteric
liquid
crystal
elastomer
(Lumin‐CLCE)
mechanically
CPL,
which
is
enabled
by
crystal‐templated
self‐assembly
situ
covalent
cross‐linking
judiciously
designed
photopolymerizable
CsPbX
3
(X=Cl,
Br,
I)
PQD
nanomonomers
into
elastic
polymer
networks.
The
resulting
Lumin‐CLCE
showcase
structural
color
natural
light
noticeable
CPL
maximum
value
up
to
1.5
under
UV
light.
manipulation
intensity
rotation
direction
achieved
controlling
self‐assembled
helicoidal
nanostructure
handedness
soft
helices.
A
significant
breakthrough
lies
achievement
reversible,
perovskite‐based
switch
activated
biaxial
stretching,
enables
flexible,
dynamic
anti‐counterfeiting
labels
capable
decrypting
preset
information
specific
polarization
states.
This
work
can
provide
new
insights
development
advanced
materials
their
emerging
applications
encryption,
3D
displays,
beyond.
Accounts of Chemical Research,
Год журнала:
2024,
Номер
57(8), С. 1188 - 1201
Опубликована: Апрель 5, 2024
ConspectusCircularly
polarized
luminescence
(CPL)
generated
by
chiral
luminescent
systems
has
sparked
enormous
attention
in
multidisciplinary
field
as
it
brings
infinite
potential
for
applications,
such
3D
optical
displays,
biological
probes,
and
chiroptical
sensors.
Satisfying
both
the
conditions
of
chirality
(including
fluorescence
or
phosphorescence)
is
a
prerequisite
constructing
CPL
materials.
In
this
regard,
whether
organic,
inorganic,
hybrid
systems,
components
generally
involve
effective
coupling
through
covalent
noncovalent
bonds.
For
interactions,
copolymerization
monomers,
although
bonds
provide
high
stability
system,
they
inevitably
tedious
preparation
procedures
that
connect
together.
bonds,
take
supramolecular
assembly
an
example,
elements
achiral
light-emitting
units
are
transferred
intermolecular
their
advantages
include
diversity
building
blocks,
stimuli
responsiveness
brought
well
amplification
signals
coassembly.
However,
system
may
be
poor,
performance
morphology
difficult
to
predict.
Gratifyingly,
matching
rule
do
not
rely
on
together
with
interactions
allows
effortless
construction,
modulation,
systems.In
Account,
we
overview
different
strategies
based
rule,
including
fluorescence-selective
absorption,
circularly
reflection,
energy
transfer
(CPF-ET).
Examples
these
illustrated
focus
helical
polymers
light
appealing
structures
wide
uses.
instance,
can
convert
racemic
into
one
specific
handedness
simply
overlapping
polymer's
circular
dichroism
(CD)
spectra
luminophore's
emission
spectra.
employing
selective
reflection
certain
handedness's
light,
twisting
power
(HTP)
polymer
cholesteric
liquid
crystals
(N*-LCs)
gives
glum.
Additionally,
CPF-ET,
only
spectrum
donor
absorption
(or
excitation)
acceptor
required
overlap,
no
between
two
required.
An
outlook
materials
related
which
will
avail
optimization
extension
intriguing
approach
concludes
Account.
We
hope
Account
offer
insightful
inspiration
flourishing
progress
present
exciting
opportunities.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(11), С. 7668 - 7678
Опубликована: Март 7, 2024
Organic
phosphors
integrating
circularly
polarized
persistent
luminescence
(CPPL)
across
the
visible
range
are
widespread
for
applications
in
optical
information
encryption,
bioimaging,
and
3D
display,
but
pursuit
of
color-tunable
CPPL
single-component
organics
remains
a
formidable
task.
Herein,
via
situ
photoimplanting
radical
ion
pairing
into
axial
chiral
crystals,
we
present
elucidate
an
unprecedented
double-module
decay
strategy
to
achieve
colorful
through
combination
stable
triplet
emission
from
neutral
diphosphine
doublet
radiance
photogenic
radicals
exclusive
crystalline
framework.
Owing
photoactivation-dependent
component
inherent
phosphorescence
asymmetric
environment,
CPL
vision
can
be
regulated
by
altering
photoactivation
observation
time
window,
allowing
glow
tuning
blue
orange
delayed
green
emission.
Mechanism
studies
clearly
reveal
that
this
electron
migration
environment
hybrid
n–π*
π–π*
instincts
responsible
afterglow
at
ambient
conditions.
Moreover,
demonstrate
displays
encryption
manipulation
both
excitation
times.
Chemical Science,
Год журнала:
2024,
Номер
15(20), С. 7408 - 7440
Опубликована: Янв. 1, 2024
Recent
advances
in
synthesis
have
opened
the
way
to
a
variety
of
boron
helicenes.
We
highlight
main
achievements
these
chiral
compounds
and
discuss
their
photophysical
properties
potential
as
functional
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(36)
Опубликована: Июнь 10, 2024
The
fabrication
of
materials
that
can
switch
between
circularly
polarized
luminescence
(CPL)
signals
is
both
essential
and
challenging.
Here,
two
new
halogen-bonded
fluorescent
molecular
photoswitches,
namely,
HB-switch
1
2,
containing
α-cyano-substituted
diarylethene
compounds
with
different
end
groups
were
developed.
Upon
exposure
to
specific
UV
or
visible
light
wavelengths,
they
exhibited
controllable
reversible
Z/E
photoisomerization.
When
these
switches
integrated
into
blue-phase
liquid
crystals
(BPLCs),
the
temperature
range
BP
significantly
expanded.
Notably,
system
incorporating
exclusively
achieved
polarization
inversion
CPL
under
irradiation
UV/Visible
during
cooling/heating.
photo/thermal
dual-response
behavior
be
attributed
phase
transition
from
a
high-symmetry
3D
Icubic
lattice
low-symmetry
1D
helical
superstructure
induced
by
photoisomerization
changes.
This
study
underscores
significance
employing
halogen-bond
assembly
strategies
design
switchable
signals,
opening
possibilities
for
CPL-active
systems.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 21, 2024
Abstract
Circularly
polarized
luminescence
(CPL)
materials
offer
exciting
potential
due
to
their
unique
light
properties.
However,
controlling
the
color
of
afterglow
emission,
a
key
feature
for
many
applications
remains
challenge.
Here,
co‐doping
strategy
is
presented
precise
control
multicolor
CPL
in
films.
This
approach
utilizes
chiral
naphthylphosphoric
acid
derivatives
as
energy
and
chirality
transfer
donors,
commonly
used
fluorescent
dye
rhodamine
B
(RB)
PVA
are
selected
acceptor
polymeric
matrix,
respectively.
Remarkably,
co‐doped
films
exhibit
ultra‐long
green
circular
polarization
phosphorescence
lasting
several
seconds
with
high
efficiency
(14.23%),
lifetime
(1025.5
ms),
dissymmetry
factor
(8.44
×
10
−3
).
Crucially,
by
adjusting
content,
it
can
precisely
tune
phosphorescence‐to‐fluorescence
ratio
achieve
afterglow.
stems
from
combination
Förster
resonance
transfer,
color‐mixing
effects.
Furthermore,
this
significantly
improves
asymmetry
an
order
magnitude
(5.17
−2
It
anticipated
that
straightforward
regulating
will
provide
invaluable
insights
future
design
highly
efficient
innovative
materials.
Abstract
Circularly
polarized
room‐temperature
phosphorescence
(CPRTP)
simultaneously
featuring
multiple
colors
and
extremely
high
dissymmetry
factor
(
g
lum
)
is
crucial
for
increasing
the
complexity
of
optical
characteristics
advancing
further
development,
but
such
a
type
CPRTP
still
unprecedented.
The
present
work
develops
an
effective
universal
strategy
to
achieve
full‐color
with
ultra‐high
factors
in
polymeric
cholesteric
superhelix
network,
which
constructed
by
liquid
crystal
polymer
chiral
helical
(CHP).
Taking
advantage
twisting
power
CHP,
resulting
network
exhibits
remarkable
activity.
Significantly,
adopting
simple
double‐layered
architectures
consisting
film
phosphorescent
films,
blue‐,
green‐,
yellow‐,
red‐CPRTP
emissions
are
successfully
obtained,
maximum
|
values
up
1.43,
1.39,
1.09
0.84,
respectively.
Further,
multilevel
information
encryption
application
demonstrated
based
on
multidimensional
architectures.
This
study
offers
new
insights
into
fabricating
considerable
performance
advanced
photonic
applications.
