Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 22, 2024
Abstract
Organic
circularly
polarized
luminescence
(CPL)
plays
crucial
roles
in
chemistry
and
biology
for
the
potential
chiral
recognition,
asymmetric
catalysis,
3D
displays,
biological
probes.
The
long‐lived
luminescence,
large
Stokes
shift,
unique
chiroptical
properties
make
organic
room‐temperature
phosphorescence
(CPP)
a
new
research
hotspot
recent
years.
Nevertheless,
achieving
high‐performance
CPP
is
still
challenging
due
to
sensitivity
complexity
of
integrating
triplet
excitons
polarization
within
materials.
This
review
summarizes
latest
advances
CPP,
ranging
from
design
strategies
photophysical
underlying
mechanisms
applications.
Specifically,
generating
are
systemically
categorized
discussed
according
interactions
between
units
chromophores.
applications
light‐emitting
diodes,
sensing,
afterglow
information
encryption
also
illustrated.
In
addition,
we
present
current
challenges
perspectives
on
developing
CPP.
We
expect
this
provide
some
instructive
principles
fabricate
materials,
offering
an
in‐depth
understanding
mechanism
paving
way
toward
diverse
practical
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.
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.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 11, 2024
Circularly
polarized
long
afterglow
(CPLA)
attracts
great
interests
in
multi-disciplinary
fields
with
significant
potentials
optical
multiplexing
applications,
but
achieving
full-color
and
white
CPLA
is
still
challenging.
The
present
contribution
reports
the
first
success
utilizing
circularly
phosphorescence
energy
transfer
(CPP-ET)
combined
chirality-selective
absorption
(CSA)
to
construct
materials.
Blue
luminescence
dissymmetry
factor
(g
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(29)
Опубликована: Май 8, 2024
Room
temperature
phosphorescence
(RTP)
materials
have
garnered
significant
attention
owing
to
its
distinctive
optical
characteristics
and
broad
range
of
potential
applications.
However,
the
challenge
remains
in
producing
RTP
with
more
simplicity,
versatility,
practicality
on
a
large
scale,
particularly
achieving
chiral
signals
within
single
system.
Herein,
we
show
that
straightforward
effective
combination
wet
spinning
twisting
technique
enables
continuously
fabricating
fibers
twisting-induced
helical
chirality.
By
leveraging
hydrogen
bonding
interactions
between
polyvinyl
alcohol
(PVA)
quinoline
derivatives,
along
rigid
microenvironment
provided
by
PVA
chains,
typically,
Q-NH
Angewandte Chemie,
Год журнала:
2024,
Номер
136(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.
Chemical Communications,
Год журнала:
2024,
Номер
60(70), С. 9328 - 9339
Опубликована: Янв. 1, 2024
This
article
summarizes
the
potential
of
TPP
salts
in
tuning
RTP
properties
and
their
applications
multi-level
information
encryption,
high-level
anticounterfeiting
tags,
X-ray
scintillators.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 16, 2024
Abstract
Circularly
polarized
luminescent
(CPL)
materials
have
garnered
tremendous
attention
owing
to
their
expanded
optical
properties
beyond
emission
wavelength
and
intensity.
Among
these,
the
emerging
circularly
organic
ultralong
room‐temperature
phosphorescence
(CP‐OURTP)
materialsdemonstrating
elegant
distinct
features
are
of
significant
importance
for
extended
lifetime,
which
represent
a
novel
frontier
in
research
with
promising
scientific
technological
applications
across
diverse
fields.
This
review
systematically
outlines
traditional
strategies
achieve
CP‐OURTP
including
crystals,
copolymerization,
host–guest
doping,
combination
copolymerization
spinning
twisting
technology,
supramolecular
polymer
assembly.
Importantly,
recent
progress
chiral
soft
materials,
such
as
liquid
crystals
(LCs)
involving
lyotropic
LCs
(cellulose
nanocrystals,
CNCs)
thermotropic
(cholesteric
LC
elastomers),
is
showcased.
Finally,
practical
summarized,
concludes
perspectives
on
current
challenges
future
opportunities
materials.
aims
inspire
further
innovations
fabrication
advanced
enrich
applications.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 19, 2024
Abstract
Blue
phase
liquid
crystals
(BPLCs)
have
exhibited
promising
applications
in
3D
flexible
displays
due
to
their
molecular‐level
self‐assembled
chiral
structures,
fast
response,
and
tunable
polarized
colors.
However,
there
remain
challenges
for
spatiotemporal
programming
of
color
units
BPLC
dynamic
patterning.
Herein,
the
programmable
temporal
evolution
micrometer‐scale
spatial
configuration
switch
modes
are
achieved
by
spontaneous
ink
diffusion‐driven
asymmetric
lattice
deformation
dual‐chiral
polymer‐templated
blue
phases.
Custom‐printed
colorful
patterns
designed
machine
learning‐assisted
parameter
optimization,
which
multidimensional
encrypted
information
that
incorporates
evolving
colors
(wavelength),
distribution
(depth),
(L/R).
The
quantitative
relationship
between
diffusion
kinetics
blue‐phase
structural
optics
is
established
situ
characterization,
finite
element
analysis,
mathematical
geometry
modeling.
This
work
provides
insights
into
microgeometric
manipulation
BPLCs
application
security
self‐adaptive
indicators.
