ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(12), P. 15242 - 15250
Published: March 14, 2024
A
coordination
complex,
Eu(C12C12dbm)3(phen),
with
strong
emission
and
a
high
quantum
yield
(QY
∼
51.9%)
was
synthesized.
The
EuIII
as
fluorescent
emitter,
embedded
in
cholesteric
liquid
crystal
polymer
networks
(CLCNs).
series
of
free-standing
EuIII-CLCN
films
were
obtained,
generating
typical
sharp
band
corresponding
to
the
complex.
Tunable
handedness
circularly
polarized
luminescence
(CPL)
|glum|
values
(up
0.63)
observed.
CPL-active
CLCN-coated
PET
also
prepared
(|glum|
up
0.63),
which
can
be
used
for
large-area
preparations.
Moreover,
by
stacking
an
emitter-embedded
PMMA
layer
CLCN
layer,
composite
system
built,
large
value
(∼1.42)
achieved.
Fluorescence
patterns
prepared,
distinct
images
recognized
under
both
daylight
UV
light.
This
work
not
only
demonstrated
that
compounds
could
incorporated
prepare
materials
but
provided
new
perspective
emissive
anticounterfeiting
encryption.
Journal of the American Chemical Society,
Journal Year:
2022,
Volume and Issue:
144(21), P. 9380 - 9389
Published: May 20, 2022
Three
achiral
polycyclic
aromatic
fluorophores─namely,
1-pyrenecarboxylic
acid,
9-anthracenecarboxylic
and
perylene-3,9-dicarboxylic
acid─were
chosen
based
on
their
desired
properties
before
being
incorporated
into
the
construction
of
a
K+-carrying
gamma-cyclodextrin
(γ-CD)-based
metal–organic
framework
(CD-MOF-1)
γ-CD-containing
hybrid
frameworks
(CD-HFs).
Among
these
fluorophores,
only
pyrene-carrying
one
shows
significant
noncovalent
bonding
interactions
with
γ-CD
in
solution.
This
fluorophore
is
encapsulated
CD-HF
trigonal
superstructure
instead
common
cubic
CD-MOF-1
found
case
other
two
fluorophores.
Single-crystal
X-ray
diffraction
analysis
reveals
π-stacked
chiral
positioning
inside
(γ-CD)2
tunnels
held
uniformly
around
an
enantiomorphous
32
screw
axis
along
c
direction
solid-state
structure.
helix-like
structure
demonstrates
additional
level
chirality
over
above
point-chiral
stereogenic
centers
axial
associated
self-assembled
These
arrangements
result
specifically
generated
photophysical
chiroptical
properties,
such
as
controlled
emergence
circularly
polarized
luminescence
(CPL)
emission.
In
this
manner,
complete
understanding
mechanism
transfer
from
host
(CD-HF)
to
has
been
achieved,
attribute
which
often
missing
development
materials
CPL.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
124(3), P. 1034 - 1121
Published: Jan. 17, 2024
Organic
radicals
are
attracting
increasing
interest
as
a
new
class
of
molecular
emitters.
They
demonstrate
electronic
excitation
and
relaxation
dynamics
based
on
their
doublet
or
higher
multiplet
spin
states,
which
different
from
those
singlet–triplet
manifolds
conventional
closed-shell
molecules.
Recent
studies
have
disclosed
luminescence
properties
excited
state
unique
to
radicals,
such
highly
efficient
electron–photon
conversion
in
OLEDs,
NIR
emission,
magnetoluminescence,
an
absence
heavy
atom
effect,
spin-dependent
spin-selective
dynamics.
These
difficult
sometimes
impossible
achieve
with
luminophores.
This
review
focuses
luminescent
organic
emerging
photofunctional
system,
introduces
the
material
developments,
fundamental
including
luminescence,
photofunctions.
Materials
covered
this
range
monoradicals,
radical
oligomers,
polymers
metal
complexes
ligands
demonstrating
radical-involved
emission.
In
addition
stable
transiently
formed
generated
situ
by
external
stimuli
introduced.
shows
that
great
potential
expand
chemical
spaces
materials
thus
broaden
applicability
systems.
Abstract
Polymer-based
circularly
polarized
luminescence
(CPL)
materials
with
the
advantage
of
diversified
structure,
easy
fabrication,
high
thermal
stability,
and
tunable
properties
have
garnered
considerable
attention.
However,
adequate
precise
tuning
over
CPL
in
polymer-based
remains
challenging
due
to
difficulty
regulating
chiral
structures.
Herein,
visualized
full-color
is
achieved
by
doping
red,
green,
blue
quantum
dots
(QDs)
into
reconfigurable
phase
liquid
crystal
elastomers
(BPLCEs).
In
contrast
signal
observed
cholesteric
(CLCEs),
3D
cubic
superstructure
BPLCEs
induces
an
opposite
signal.
Notably,
this
effect
entirely
independent
photonic
bandgaps
(PBGs)
results
a
g
lum
value,
even
without
matching
between
PBGs
emission
bands
QDs.
Meanwhile,
lattice
structure
can
be
reversibly
switched
via
mechanical
stretching
force,
inducing
on-off
switching
signals,
these
variations
further
fixed
using
dynamic
disulfide
bonds
BPLCEs.
Moreover,
smart
systems
for
anti-counterfeiting
information
encryption
been
demonstrated,
suggesting
great
potential
BPLCEs-based
active
materials.
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(29)
Published: May 2, 2022
Chiral
semiconductor
nanostructures
have
received
enormous
attention
due
to
their
emerging
circularly
polarized
luminescence
(CPL)
properties.
However,
compared
with
well-studied
photoluminescence
(PL),
the
reported
CPL
is
much
weaker
and
more
challenging
be
modulated.
Herein,
we
describe
a
new
approach
for
acquiring
intense
tunable
from
inorganic
chiral
photonic
crystals
(CPCs)
doped
quantum
dots
(QDs).
Unprecedentedly,
sign,
position
intensity
of
peaks
can
precisely
controlled
by
manipulating
either
band
gap
CPCs
or
wavelength
QDs
giant
absolute
dissymmetry
factor
|glum
|
up
0.25
obtained.
More
importantly,
origin
modulation
clearly
elucidated
both
experiment
theory.
This
work
lays
foundation
construction
next-generation
high-performance
CPL-based
devices.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
33(6)
Published: Dec. 9, 2022
Abstract
As
a
typical
representative
of
dopants,
organic
functional
dyes
have
demonstrated
their
significant
roles
in
novel
smart
liquid
crystal
(LC)
devices,
and
dye‐doped
LCs
also
been
source
inspiration
for
scientists
to
design
fabricate
stimuli‐gated
materials
or
devices
envisioned
applications
wide
range
areas.
In
this
review,
the
focus
on
dichroic
dyes,
fluorescent
photothermal
recent
progress
LC
employing
these
as
dopants
are
overviewed.
The
review
highlights
developments
doped
with
dyes.
structures,
designs,
outlined.
underlying
principles
which
utilized
first
introduced.
Subsequently,
application
fields
windows,
attenuators
augmented
reality
(AR)
systems,
color‐changeable
textiles,
color
filters,
dual‐mode
circular
polarizers,
chirality
detectors,
optical
limiters,
switchable
luminescent
solar
concentrators,
multiple
information
encryption,
anti‐counterfeiting,
photo‐addressed
transparent
displays,
circularly
polarized
luminescence,
tunable
lasers,
light‐driven
soft
actuators
discussed.
Finally,
challenge
strategies
future
improvement
Angewandte Chemie International Edition,
Journal Year:
2022,
Volume and Issue:
61(18)
Published: Feb. 8, 2022
Abstract
Circularly
polarized
light
(CPL)
is
key
to
asymmetric
photochemistry
as
it
could
impart
the
chiral
organization
information
into
chemical
products.
Here,
we
demonstrate
circular
polarization
capacity
of
cellulose
nanocrystal
(CNC)
films
trigger
photo‐alignment
achiral
supramolecular
polymers
helical
structures.
Right‐handed
transmitted
(T‐)
CPL
was
generated
from
self‐assembled
CNC
films,
which
induced
amorphous
azobenzene
(Azo)
The
induction
effect
T‐CPL
enhanced
on
Azo
with
longer
spacers.
absorptive
dissymmetry
factor
(
g
abs
)
values
liquid‐crystal
can
be
amplified
significantly
(over
10
times)
after
irradiation.
Moreover,
by
integrating
carbon
dots
emission
a
considerable
luminescence
lum
up
−0.66
achieved,
and
used
for
high
chiroptical
properties.
This
work
provides
new
insight
photo
modulation
CPL‐active
materials.
Advanced Materials,
Journal Year:
2022,
Volume and Issue:
35(51)
Published: Oct. 17, 2022
Fabricating
chiral
inorganic
materials
and
revealing
their
unique
quantum
confinement‐determined
optical
responses
are
crucial
tasks
in
the
multidisciplinary
fields
of
chemistry,
physics,
biology.
The
field
mesostructured
started
from
synthesis
individual
nanocrystals
evolved
to
include
assembly
metals,
semiconductors,
ceramics,
salts
endowed
with
various
structures
ranging
atomic
micron
scales.
This
tutorial
review
highlights
recent
research
on
materials,
especially
novel
expression
chirality
response,
it
may
inspire
us
new
strategies
for
design
opportunities
beyond
traditional
applications
chirality.
Fabrication
methods
classified
according
type,
scale,
symmetry‐breaking
mechanism.
Special
attention
is
given
highlight
systems
original
discoveries,
exceptional
phenomena,
or
mechanisms
response
left‐
right‐handedness.
ACS Applied Materials & Interfaces,
Journal Year:
2022,
Volume and Issue:
14(26), P. 30362 - 30370
Published: June 27, 2022
Developing
circularly
polarized
luminescence
(CPL)-active
materials
with
a
large
dissymmetry
factor
(glum)
or
stimulus
responses
has
evoked
lot
of
interest
in
the
past
few
years;
however,
light-controllable
"on/off"
CPL
still
remains
challenge.
Here,
novel
diarylethene-based
chiral
fluorescent
photoswitch
featuring
"turn-on"
characteristic
is
developed,
designated
as
(S,S)-switch
6,
which
can
undergo
reversible
photocyclization/cycloreversion
upon
irradiation
UV
and
visible
light.
(S,S)-Switch
6
shows
completely
"off-on-off"-responsive
behavior
solution.
By
doping
into
nematic
liquid
crystals
(LCs),
consequent
luminescent
cholesteric
LCs
(CLCs)
exhibit
larger
glum
value
enhanced
2
orders
magnitude
when
irradiated
light,
be
attributed
to
highly
ordered
helical
arrangement
CLCs.
The
potentials
this
turn-on
type
material
for
anticounterfeiting
information
encryption
are
illustrated.
Furthermore,
visualization
(CP)
patterns
successfully
achieved
by
constructing
double-layer
system
consisting
CP
layer
polymer
reflective
layer.
proposed
concept
establishes
light-controlled
off-on-off
platform
that
tremendous
potential
applications
multi-informational
data
storage
devices.