Industrial & Engineering Chemistry Research,
Год журнала:
2023,
Номер
62(26), С. 9961 - 9969
Опубликована: Июнь 21, 2023
Creating
flexible
materials
with
multi-dimensional
security
holds
great
promise
for
anti-counterfeiting
labels
in
food,
currency,
and
pharmaceuticals,
but
it
is
proven
extremely
challenging.
Herein,
we
propose
a
photoresponsive
liquid
crystal
polymer
(LCP)
film
by
incorporating
polymerizable
photoswitch
into
commercial
LCP
ultraviolet
(UV)
light
exposure.
Reversible
photochromism
can
be
observed
between
light-
dark-red
under
UV
visible
irradiation
alternatively,
accompanying
variation
of
fluorescence
intensity.
In
addition,
series
photonic
microstructures
are
written
on
the
taking
advantage
predefined
patterned
light.
A
quadri-dimensional
label,
featuring
photochromism,
fluorescence,
embedded
microstructures,
optical
diffraction
constructed
assistance
film.
This
strategy
represents
beneficial
step
toward
materials,
which
enhances
secure
level
practical
product
engineering
applications.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 2, 2024
Chiral
liquid
crystal
supramolecular
assembly
provides
an
ideal
strategy
for
constructing
excellent
circularly
polarized
luminescence
(CPL)
materials.
However,
the
chirality
transfer
in
chiral
crystals
normally
occurs
at
two
levels
from
configurational
to
phase
chirality.
The
more
precise
and
of
transmission
are
fascinating
but
remain
challenging.
present
work
reports
first
success
three-level
amplification
configurationally
point
small
molecules
conformationally
helical
polymers
finally
cholesteric
composed
nonfluorescent
(P46)
nematic
crystals.
Noticeably,
twisting
power
P46
is
five-fold
larger
than
its
monomer.
Full-color
white
CPL
with
maximum
dissymmetry
factor
up
1.54
photoluminescence
quantum
yield
63.8%
realized
utilizing
combined
selective
reflection
mechanism.
Also
significantly,
electrically
stimuli-responsive
switching
device
as
well
anti-counterfeiting
security,
information
encryption,
logic
gate
applications
developed.
This
study
deepens
understanding
across
different
hierarchical
levels.
ABSTRACT
Control
of
the
dissymmetry
circularly
polarized
luminescence
(CPL)
is
intriguing
and
has
great
potential
for
applications
in
field
optics.
The
traditional
control
strategy
involves
using
opposite
enantiomers
to
achieve
reversal
CPL
signs.
However,
regulating
by
controlling
only
transition
dipole
moments
without
changing
molecular
or
supramolecular
chirality
remains
a
challenge.
Herein,
we
developed
couple
crystal
materials
based
on
axially
chiral
aggregation‐induced
emission
luminogens
(AIEgens).
These
exhibit
achiral
solvent‐induced
sign
inversion
with
identical
helical
structures
their
crystalline
states.
(
R
)‐BPAuCz
T
displays
(+)‐CPL
factor
g
lum
)
value
+9.81
×
10
−4
(560
nm),
while
C
exhibits
(−)‐CPL
−1.02
−3
nm).
Time‐dependent
density
functional
theory
calculations
show
that
magnetic
electric
at
S
1
→
0
unit
cell
are
considerably
influenced
cocrystallized
solvent
molecules,
revealing
mechanism.
nonbonding
interactions
between
molecules
(i.e.,
tetrahydrofuran
CDCl
3
AIEgens
play
crucial
role
manipulation
moment
these
materials.
Moreover,
microrods
,
DCE
optical
waveguide
properties
relatively
low
optical‐loss
coefficients
187.3,
567.4,
65.2
dB/cm,
respectively.
findings
can
help
developing
new
toward
signals
providing
application
future
integrated
photonic
circuits.
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
Industrial & Engineering Chemistry Research,
Год журнала:
2023,
Номер
62(26), С. 9961 - 9969
Опубликована: Июнь 21, 2023
Creating
flexible
materials
with
multi-dimensional
security
holds
great
promise
for
anti-counterfeiting
labels
in
food,
currency,
and
pharmaceuticals,
but
it
is
proven
extremely
challenging.
Herein,
we
propose
a
photoresponsive
liquid
crystal
polymer
(LCP)
film
by
incorporating
polymerizable
photoswitch
into
commercial
LCP
ultraviolet
(UV)
light
exposure.
Reversible
photochromism
can
be
observed
between
light-
dark-red
under
UV
visible
irradiation
alternatively,
accompanying
variation
of
fluorescence
intensity.
In
addition,
series
photonic
microstructures
are
written
on
the
taking
advantage
predefined
patterned
light.
A
quadri-dimensional
label,
featuring
photochromism,
fluorescence,
embedded
microstructures,
optical
diffraction
constructed
assistance
film.
This
strategy
represents
beneficial
step
toward
materials,
which
enhances
secure
level
practical
product
engineering
applications.
