Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 28, 2025
Abstract
Blue
is
one
of
the
three
primary
colors,
and
it
a
crucial
element
in
regulation
application
organic
room‐temperature
phosphorescence
(ORTP).
However,
considerable
Stokes
shift
small
molecules
presents
challenge
for
creating
blue
afterglow
materials.
To
address
this,
host‐guest‐doped
materials
are
prepared
by
selecting
compounds
with
similar
structures
self‐doping.
This
method
effectively
regulated
long‐lasting
phosphorescence.
Additionally,
persistent‐RTP
long‐persistent
luminescence
(LPL)
properties
can
be
further
enhanced
incorporating
rigid
or
flexible
polymer
network,
dense
environment
between
host
guest.
Remarkably,
lifetime
duration
polymer‐assisted
doped
≈5
times
greater
than
those
host‐guest
crystal
Apart
from
its
high
efficiency,
environmental
friendliness,
easy
synthesis,
this
ORTP
material
boasts
thermal
stability
flexibility.
Furthermore,
demonstrates
potential
applications
such
as
information
encryption
anti‐counterfeiting
across
various
media,
including
paper,
cotton
thread,
leaves.
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Май 13, 2024
Achieving
thermochromic
afterglow
(TCAG)
in
a
single
material
for
advanced
information
encryption
remains
significant
challenge.
Herein,
TCAG
carbon
dots
(CDs)-inked
paper
(CDs@Paper)
is
achieved
by
tuning
the
temperature-dependent
dual-mode
of
room
temperature
phosphorescence
(RTP)
and
thermally
activated
delayed
fluorescence
(TADF).
The
CDs
are
synthesized
through
thermal
treatment
levofloxacin
melting
boric
acid
with
postpurification
via
dialysis.
CDs@Paper
exhibit
both
excitation-dependent
color
properties.
exhibits
dynamic
changes
from
blue
at
high
temperatures
to
yellow
low
adjusting
proportion
TADF
phosphorescence.
Notably,
two-photon
CDs-based
materials
time-dependent
colors
first
time.
Moreover,
leveraging
opposite
emission
responses
temperature,
demonstrate
temperature-sensing
capabilities
across
wide
range.
Furthermore,
CDs@Paper-based
3D
code
containing
successfully
developed
encryption.
Advanced Materials,
Год журнала:
2024,
Номер
36(27)
Опубликована: Апрель 23, 2024
Abstract
The
development
of
single‐system
materials
that
exhibit
both
multicolor
room‐temperature
phosphorescence
(RTP)
and
thermally
activated
delayed
fluorescence
(TADF)
with
tunable
after
glow
colors
channels
is
challenging.
In
this
study,
four
metal‐free
carbon
dots
(CDs)
are
developed
through
structural
tailoring,
panchromatic
high‐brightness
RTP
achieved
via
strong
chemical
encapsulation
in
urea.
maximum
lifetime
quantum
yield
reaches
2141
ms
56.55%,
respectively.
Moreover,
CDs‐IV@urea,
prepared
coreshell
interaction
engineering,
exhibits
a
dual
afterglow
red
green
TADF.
degree
conjugation
functional
groups
precursors
affects
the
binding
interactions
nitrogen
cladding
on
CDs,
which
turn
stabilizes
triplet
energy
levels
gap
between
S
1
T
(Δ
E
ST
)
to
induce
RTP.
enhanced
wrapping
lowers
Δ
,
promoting
reverse
intersystem
crossing,
leads
This
fully
state,
thus
stabilizing
material
water,
even
extreme
environments
such
as
acids
oxidants.
These
tested
multicolor,
time,
temperature
multiencryption
well
vivo
bioimaging.
Hence,
these
have
promising
practical
applications
information
security
biomedical
diagnosis
treatment.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(5)
Опубликована: Дек. 12, 2023
Organic
near-infrared
room
temperature
phosphorescence
(RTP)
materials
offer
remarkable
advantages
in
bioimaging
due
to
their
characteristic
time
scales
and
background
noise
elimination.
However,
developing
RTP
for
deep
tissue
imaging
still
faces
challenges
since
the
small
band
gap
may
increase
non-radiative
decay,
resulting
weak
emission
short
lifetime.
In
this
study,
fused-ring
pyrrole-based
structures
were
employed
as
guest
molecules
construction
of
long
wavelength
emissive
materials.
Compared
decrease
singlet
energy
level,
triplet
level
showed
a
more
effectively
with
conjugation
substituent
groups.
Moreover,
sufficient
fused
ring
molecule
suppresses
decay
excitons.
Therefore,
material
(764
nm)
was
achieved
penetration
bioimaging.
Tumor
cell
membrane
is
used
coat
nanoparticles
(NPs)
avoid
decreasing
performance
compared
traditional
coating
by
amphiphilic
surfactants.
NPs
tumor-targeting
properties
show
favorable
phosphorescent
properties,
superior
stability,
excellent
biocompatibility.
These
are
applied
time-resolved
luminescence
eliminate
interference
penetration.
This
study
provides
practical
solution
prepare
long-wavelength
long-lifetime
organic
applications
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(13), С. 6694 - 6734
Опубликована: Янв. 1, 2024
Delayed
luminescence
(DF),
including
phosphorescence
and
thermally
activated
delayed
fluorescence
(TADF),
circularly
polarized
(CPL)
exhibit
common
broad
application
prospects
in
optoelectronic
displays,
biological
imaging,
encryption.
Thus,
the
combination
of
is
attracting
increasing
attention.
The
encapsulation
guest
emitters
various
host
matrices
to
form
host-guest
systems
has
been
demonstrated
be
an
appealing
strategy
further
enhance
and/or
modulate
their
luminescence.
Compared
with
conventional
liquid
crystals,
polymers,
supramolecular
matrices,
porous
crystalline
frameworks
(PCFs)
metal-organic
(MOFs),
covalent-organic
(COFs),
zeolites
hydrogen-bonded
organic
(HOFs)
can
not
only
overcome
shortcomings
such
as
flexibility
disorder
but
also
achieve
ordered
guests
long-term
stability
chiral
structures,
providing
new
promising
platforms
for
development
DF
CPL.
In
this
review,
we
provide
a
comprehensive
critical
summary
recent
progress
photochemistry
Advanced Materials,
Год журнала:
2024,
Номер
36(37)
Опубликована: Июль 14, 2024
Abstract
Smart
stimuli‐responsive
persistent
luminescence
materials,
combining
the
various
advantages
and
frontier
applications
prospects,
have
gained
booming
progress
in
recent
years.
The
trap‐controlled
property
energy
storage
capability
to
respond
external
multi‐stimulations
through
diverse
pathways
make
them
attractive
emerging
multi‐responsive
smart
platforms.
This
review
aims
at
advances
materials
for
advanced
multi‐stimuli‐responsive
design
principles,
mechanisms,
representative
stimulations,
i.e.,
thermo‐,
photo‐,
mechano‐,
X‐rays
responsiveness,
are
comprehensively
summarized.
Various
hybrid
systems
containing
highlighted.
Specifically,
temperature
dependent
trapping
de‐trapping
performance
is
discussed,
from
extreme‐low
ultra‐high
conditions.
Emerging
future
perspectives
briefly
presented.
It
hoped
that
this
would
provide
new
insights
guidelines
rational
manipulation
of
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 21, 2024
Abstract
Circularly
polarized
luminescence
(CPL)
materials
offer
exciting
potential
due
to
their
unique
light
properties.
However,
controlling
the
color
of
afterglow
emission,
a
key
feature
for
many
applications
remains
challenge.
Here,
co‐doping
strategy
is
presented
precise
control
multicolor
CPL
in
films.
This
approach
utilizes
chiral
naphthylphosphoric
acid
derivatives
as
energy
and
chirality
transfer
donors,
commonly
used
fluorescent
dye
rhodamine
B
(RB)
PVA
are
selected
acceptor
polymeric
matrix,
respectively.
Remarkably,
co‐doped
films
exhibit
ultra‐long
green
circular
polarization
phosphorescence
lasting
several
seconds
with
high
efficiency
(14.23%),
lifetime
(1025.5
ms),
dissymmetry
factor
(8.44
×
10
−3
).
Crucially,
by
adjusting
content,
it
can
precisely
tune
phosphorescence‐to‐fluorescence
ratio
achieve
afterglow.
stems
from
combination
Förster
resonance
transfer,
color‐mixing
effects.
Furthermore,
this
significantly
improves
asymmetry
an
order
magnitude
(5.17
−2
It
anticipated
that
straightforward
regulating
will
provide
invaluable
insights
future
design
highly
efficient
innovative
materials.
