Inversion of Circularly Polarized Luminescence in the Left‐Handed Chitosan‐Templated Co‐assemblies
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 31, 2025
Abstract
Circularly
polarized
luminescence
(CPL)
materials
are
attractive
due
to
their
unique
applications
in
fields
such
as
3D
displays,
information
encryption,
and
chiroptical
switches.
Natural
biomolecules‐based
CPL
gaining
plenty
of
attention
chiral
diversity
sustainability.
However,
it
is
still
challenging
construct
with
opposite
signs
from
a
single
natural
biomolecule
its
inherent
chirality.
Here,
assemblies
using
chitosan
oligosaccharide
(COS)
achiral
luminescent
dyes
successfully
prepared.
It
found
that
COS
can
serve
template
induce
the
ordered
assembly
along
polymer
chain
through
electrostatic
attraction
interaction.
demonstrated
experimentally
structural
planarity
dye
molecules
crucial
for
formation
co‐assemblies.
Interestingly,
left‐handed
COS‐templated
co‐assemblies
emit
handedness,
which
controlled
by
helicity
degree
This
study
not
only
deepens
understanding
complex
biomacromolecules
but
also
provides
new
insights
into
design
construction
materials.
Язык: Английский
Construction of Carbon Dot-Based Color-Tunable Circularly Polarized Long Afterglow via in Situ Phosphorescence Resonance Energy Transfer
Nano Letters,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 28, 2025
Carbon
dots
(CDs)
with
circularly
polarized
long
afterglow
(CPLA)
properties
have
received
increasing
attention
as
a
cutting-edge
research
field.
However,
because
the
CDs
both
and
chirality
are
difficult
to
prepare
color
of
most
phosphorescent
is
mainly
concentrated
in
short
wavelengths,
it
still
formidable
challenge
explore
facile
route
achieve
intrinsic
CD-based
color-tunable
CPLA
materials
on
large
scale.
Herein,
we
developed
gram-scale
synthesis
method
via
simple
hydrothermal
mixture
boric
acid,
arginine,
various
fluorescent
dyes.
The
tunable
successfully
achieved
by
engineering
situ
phosphorescence
resonance
energy
transfer
(PRET)
between
formed
carbonization
arginine
some
dyes
those
uncarbonized
Finally,
applications
CD
composites
multimode
advanced
anti-counterfeiting
information
encryption
were
explored.
Язык: Английский
Assembly‐Induced Carbon Dots Fluorescence Enhancement Enables Single‐Component Tunable White Circular Polarization Luminescence
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 7, 2025
Abstract
White
circularly
polarized
luminescence
(WCPL)
materials
have
attracted
increasing
attention
in
recent
years
owing
to
their
numerous
applications
3D
displays,
optoelectronic
devices,
and
sensors.
However,
the
use
of
single‐component
WCPL
solid‐state
phosphors
for
display
remains
challenging.
In
this
study,
piperazine
its
derivatives
are
used
as
carriers
construct
solid
luminescent
materials.
Aspartic
acid
served
a
chiral
source
prepare
series
carbon
dots
(Ch‐CDs)
with
tunable
emission
from
cold
warm
white.
The
Ch‐CDs
achieved
maximum
fluorescence
quantum
yield
34%
asymmetry
factor
5.1
×
10
−3
.
Detailed
photodynamic
analysis
revealed
that
intrinsic
self‐trapped
exciton
state
is
primarily
responsible
spectral
broadening
Ch‐CDs.
addition,
formation
curved
nanoribbons
identified
key
WCPL.
Finally,
white
light
film
successfully
fabricated,
demonstrating
potential
light‐emitting
diodes
optical
Язык: Английский
Aggregation induced emission carbon dots with chiral and circularly polarized luminescent properties
Colloids and Surfaces A Physicochemical and Engineering Aspects,
Год журнала:
2025,
Номер
unknown, С. 136887 - 136887
Опубликована: Апрель 1, 2025
Язык: Английский
Aggregation-Induced Emission Carbon Dot-Based Multicolor Circularly Polarized Afterglow with a High Luminescence Dissymmetry Factor
The Journal of Physical Chemistry Letters,
Год журнала:
2024,
Номер
16(1), С. 140 - 147
Опубликована: Дек. 20, 2024
Carbon
dots
(CDs)
with
circularly
polarized
afterglow
(CPA)
materials
have
drawn
increasing
attention
as
cutting-edge
research
in
the
field
of
chiral
luminescence
owing
to
their
promising
applications
various
fields.
However,
due
weak
optical
activity
CDs
and
limited
color
phosphorescent
CDs,
it
is
still
a
formidable
challenge
construct
multicolor
CD-based
CPA
high
dissymmetry
factor
(glum).
Herein,
positively
charged
aggregation-induced
emission
(AIE)
were
prepared
using
dithiosalicylic
acid
ionic
liquid
precursors.
Encapsulating
AIE
nematic
structure
negatively
cellulose
nanocrystal
(CNC)
films
enabled
production
surprising
warm
white
glum
up
−0.16.
To
further
expand
afterglow,
phosphorescence
resonance
energy
transfer
between
commercial
fluorescent
dyes
was
constructed
CNC
films.
Finally,
potential
advanced
dynamic
information
encryption
explored
by
virtue
different
lifetimes.
Язык: Английский