Advanced Functional Materials,
Год журнала:
2024,
Номер
35(3)
Опубликована: Сен. 20, 2024
Abstract
Chiral
metallacages,
with
their
precisely
distributed
luminescent
and
chiral
units
inherent
adaptive
chirality,
represent
an
ideal
framework
for
developing
circularly
polarized
luminescence
(CPL)‐active
materials.
Despite
potential,
enhancing
the
dissymmetry
factor
(
g
lum
)
of
metallacage‐based
materials
remains
a
significant
challenge.
In
this
study,
useful
approach
is
proposed
by
co‐assembling
donor
metallacage
Δ
4
/
Λ
‐Zn
A
achiral
acceptor
Nile
red
(NiR),
achieving
efficient
energy
chirality
transfer
resulting
in
enhanced
CPL
these
co‐assemblies.
More
importantly,
microfluidic
laminar
flow
utilized,
known
providing
stable
driving
forces
confined
spaces,
to
achieve
marked
improvement
values
co‐assemblies
within
polymethyl
methacrylate
(PMMA)
films.
Computational
fluid
dynamics
(CFD)
simulations
small‐angle
X‐ray
scattering
(SAXS)
experiments
confirm
that
films
containing
/NiR,
prepared
via
chips,
display
well‐defined
distributions
metallacages
NiR
due
controllable
assembly
process
facilitated
flow.
This
work
pioneers
new
methodology
significantly
enhance
materials,
opening
avenues
field
photonics.
Abstract
Nonconventional
Luminescent
Materials
(NLMs)
with
distinctive
optical
properties
are
garnering
significant
attention.
A
key
challenge
in
their
practical
application
lies
precisely
controlling
emission
behavior,
particularly
achieving
excitation
wavelength‐independent
emission,
which
is
paramount
for
accurate
chemical
sensing.
In
this
study,
NLMs
(Y1,
Y2,
Y3,
and
Y4)
synthesized
via
a
click
reaction,
it
found
that
wavelength‐dependent
correlates
molecular
cluster
formation.
Rigid
Y2)
exhibit
excitation‐independent
dilute
solutions
nanoscale
clusters
but
become
excitation‐dependent
at
higher
concentrations
due
to
larger
Flexible
(Y3
always
show
indicating
tendency
While
these
high
photoluminescence
quantum
yields
(PLQYs)
(0.1
mg
mL
−1
)
up
38.0%,
they
suffer
from
aggregation‐caused
quenching
(ACQ)
the
solid
state
(as
low
as
0.5%).
These
findings
provide
insights
into
NLM
luminescence
mechanisms
offer
new
approach
tuning
properties.
With
excellent
properties,
facile
synthesis,
biocompatibility,
hold
promise
bioimaging
other
applications.
Materials Chemistry Frontiers,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Pure
organic
dual-mode
long-persistence
afterglow
with
high
efficiency
room-temperature
phosphorescence
(RTP)
along
thermally
activated
delayed
fluorescence
(TADF)
is
realized
via
an
aromatic
furan
host–guest
system.
Macromolecular Chemistry and Physics,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
Abstract
Nonconventional
luminescent
materials
(NLMs)
lacking
extended
π‐conjugated
systems
present
a
burgeoning
field
with
vast
potential
applications
in
cell
image,
and
chemical
sensing.
This
work
explores
the
synthesis,
characterization,
promising
of
novel
NLM
quaternary
ammonium
chitosan
(QCS),
bioimaging
selective
sensing
where
solutions
exhibit
remarkable
tunability
their
photophysical
properties,
influenced
by
concentration,
excitation
wavelength,
temperature.
Notably,
applying
static
pressure
to
solid
sample
significantly
enhances
its
luminous
efficiency,
rising
from
2.15%
2.59%,
inducing
redshift
emission,
emission
shifting
436
452
nm
after
force
action.
Furthermore,
QCS
demonstrates
highly
specific
fluorescent
response
toward
sodium
chlorite
(NaClO₂)
negligible
interference
common
cations
anions.
The
detection
limit
for
NaClO₂
reaches
low
0.297
mg
L
−1
,
highlighting
practical
applications.
Additionally,
exhibits
excellent
biocompatibility
cytotoxicity,
making
it
compelling
candidate
cellular
imaging.
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Full-color
CPL
composite
films
prepared
using
helical
polymers,
fluorescein
and
substrates
have
excellent
mechanical
processing
properties.
They
exhibit
matrix
universality,
low
cost,
multi-stimulus
responsiveness
to
UV,
heat,
acid/base.
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.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 5, 2025
Abstract
Circularly
polarized
luminescence
(CPL)
material
has
been
widely
exploited
in
3D
display,
information
encryption,
etc.
However,
situ
generation
and
dynamic
modulation
of
CPL
signals
to
achieve
programmable
patterns
remains
challenging
due
elusory
interactions
between
fluorescence
the
chiral
microstructures.
A
novel
strategy
is
proposed
combining
controllable
magnetic
field‐assisted
assembly
photo‐patterning
technique
form
twisted
stacking
heterostructure,
consisting
orientated
Ag@Fe
3
O
4
nanowires
(NWs)
polydimethylsiloxane
(PDMS)
film
embedded
with
achiral
dyes
polydiacetylene
(PDA)
chains.
In
a
designed
system,
PDA
chains
after
photo‐polymerization
can
serve
as
polarizer
produce
linear
fluorescence,
while
aligned
NWs
on
surface
PDMS
films
act
phase
retarder,
favoring
generation.
Furthermore,
characteristics,
including
wavelength
handedness,
be
switched
by
thermo‐chromatic
transition
PDA,
thus,
micropatterns
tailorable
distributions
achieved.
By
employing
above
two
orthogonal
channels,
system
possesses
brilliant
storage
capabilities,
multistage
encryption.
This
study
proposes
for
fabrication
toward
multiple
Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Март 13, 2025
Abstract
Ubiquitous
chirality
has
attracted
increasing
attention
because
of
its
unique
scientific
significance.
Moreover,
circularly
polarized
(CP)
absorption
and
emission,
which
are
the
essential
components
chiral
optics,
have
received
considerable
interest
from
researchers.
However,
very
few
studies
been
conducted
on
materials
with
nonreciprocal
CP
emission
that
emit
light
opposite
handedness
their
two
surfaces.
Here,
we
present
a
novel
film
developed
cellulose
nanocrystalline
(CNC).
A
sustainable
CNC
twisted
right-handedness
to
inherent
left-handed
nematic
structure
is
by
rotation-induced
dynamic
self-assembly
strategy;
this
not
only
ambidextrously
reflects
left-
right-handed
but
also
clearly
exhibits
tunable
Janus
chiroptical
activity,
i.e.,
anisotropic
Both
orientation
factor
reflected
wavelength
maximum
reflectivity
significantly
depend
rotation
rate
direction.
In
particular,
for
first
time
shows
feature
luminescence
(CPL)
achieved
through
pH-regulated
doping
cadmium
telluride
quantum
dots.
This
rare
CPL
phenomenon
broken
reciprocity
in
highly
desired
next-generation
electronics
photonics
immense
potential.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
Abstract
Preparing
multi‐color
and
multi‐stimuli‐responsive
circularly
polarized
luminescence
(CPL)
materials
understanding
the
evolution
of
chirality
through
visualized
mode
is
still
a
challenge.
Here,
an
encapsulation
engineering
approach
chiral
metal‐organic
frameworks
(MOFs)
proposed
to
confine
guest
emitters
realize
CPL.
Based
on
triplet‐triplet
energy
transfer
(TTET),
white
CPL
near‐infrared
room
temperature
phosphorescence
(NIR‐CPRTP)
can
be
obtained
by
introducing
pyrene
derivatives.
With
introduction
containing
vinylpyrene
group,
light‐
thermal‐responsive
with
signal
inversion
realized
reversible
[2+2]
cycloaddition
reaction
between
ligand
triggered
visible
light/ultraviolet
light
or
heating.
Furthermore,
excitation‐dependent
successfully
achieved
incorporation
excited
state
intramolecular
proton
(ESIPT)
molecules
into
nanopores.
Importantly,
magnification
greatly
enhanced
spatial
confinement,
accurate
host‐guest
single
crystal
structures
FLT@DCF‐12
FLT@LCF‐12
provide
understand
mechanism
transfer,
amplification
responsiveness.
White
LED
multiple
information
display
encryption
are
further
demonstrated.
This
breakthrough
provides
new
perspective
guest‐encapsulated
MOFs
contributes
construction
stimuli‐responsive
CPL‐active
materials.
