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.
Advanced Optical Materials,
Journal Year:
2022,
Volume and Issue:
10(22)
Published: Sept. 6, 2022
Abstract
Responsive
photonic
crystals
have
attracted
significant
attention
in
fundamental
scientific
research
and
technological
applications.
Upon
applying
external
stimuli,
such
as
mechanical,
electrical,
magnetic,
optical
triggers,
the
properties
of
can
be
actively
tuned.
Among
a
large
number
crystals,
cellulose
nanocrystals
(CNCs)
are
considered
one
most
promising
materials
due
to
their
renewability,
simplicity
preparation,
unprecedented
chirality.
A
comprehensive
overview
design
principles,
methodologies,
responsive
mechanisms,
practical
applications
chiral
CNC
is
presented
here.
The
changes
helix
pitch,
refractive
index,
orientation,
resulting
structural
CNCs
response
various
stimuli
discussed.
Thereafter,
novel
CNCs,
colorimetric
sensors,
actuators,
rewritable
papers,
anti‐counterfeiting
smart
tags
described.
We
conclude
by
discussing
future
challenges
opportunities
for
developing
high‐performance
materials.
Materials Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
7(18), P. 3879 - 3903
Published: Jan. 1, 2023
The
research
progress
of
macrocyclic
CPL
systems
has
been
reviewed
based
on
individual
chiral
macrocycles,
host–guest
complexation,
and
in
particular
their
self-assembly
systems.
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
11(21)
Published: June 25, 2023
Abstract
Pure
organic
circularly
polarized
room‐temperature
phosphorescence
(CPRTP)
materials
show
significant
promise
for
applications
in
advanced
anti‐counterfeiting,
biological
imaging,
and
so
on.
However,
it
remains
challenging
to
prepare
CPRTP
with
a
high
luminescence
dissymmetry
factor
(g
lum
).
This
article
provides
simple
efficient
method
pure
g
from
cholesteric
liquid
crystals
by
incorporation
of
achiral
phosphorescent
chromophore
dibenzofuran
into
chiral
cholesterol
mesogen
via
flexible
spacer.
The
findings
that
the
synthetic
compound
Chol‐C6‐DF
can
form
effectively
amplify
value
through
selective
reflection.
film
produce
yellow
when
excited
chromophore.
value,
lifetime,
quantum
yield
produced
under
excitation
380
nm
light
are
−0.19,
567.7
ms,
3.2%,
respectively.
Even
more
interesting
is
also
exhibits
RTP
clustering‐triggered
emission
characteristics.
lifetime
red
420
‐0.11
1.11
s.
Under
410,
430,
470
light,
yields
19.0%,
20.2%,
19.1%,
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(15)
Published: Feb. 5, 2024
Abstract
Chiral
self‐assembly
has
often
been
found
to
be
an
efficient
strategy
for
the
development
of
high‐performance
circularly
polarized
luminescent
(CPL)
materials,
through
regulation
ordered
helical
superstructure
blocks
in
liquid
crystal
media.
Here,
design
and
synthesis
two
pairs
axially
chiral
emitters
(BBXT‐3‐Br
BOHXT‐3‐Br)
are
reported
based
on
bromoxanthone.
And
self‐assembled
polymer
(LCP)
framework
(PRM257)
is
demonstrated
by
mixing
with
monomer
(RM257)
thermal
annealing
photoinitiated
polymerization.
Both
BBXT‐3‐Br@PRM257
BOHXT‐3‐Br@PRM257
exhibited
excellent
room
temperature
phosphorescence
(RTP)
properties.
In
addition,
enantiomers
showed
afterglow
average
lifetime
(
τ
)
162.41
ms
emitted
blue
CPL
λ
em
=
450
nm,
Φ
FL
1.3%,
|
g
0.071),
although
weak
RTP
(CP‐RTP)
observed.
Interestingly,
a
less
conjugated
system
emits
red
98.83
ms)
also
intense
CP‐RTP
612
Phos
0.45%,
0.057).
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.
