Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 24, 2024
Abstract
Organic
cocrystals
formed
through
multicomponent
self‐assembly
have
attracted
significant
interest
owing
to
their
clear
structure
and
tunable
optical
properties.
However,
most
cocrystal
systems
suffer
from
inefficient
long‐wavelength
emission
low
phosphorescence
efficiency
due
strong
non‐radiative
processes
governed
by
the
energy
gap
law.
Herein,
an
efficient
long‐lived
red
afterglow
is
achieved
using
a
pyrene
(Py)
system
incorporating
second
component
(NPYC4)
with
thermally
activated
delayed
fluorescence
(TADF)
ultralong
organic
(UOP)
The
(NPYC4‐Py)
not
only
inherits
excellent
luminescence
of
its
monomeric
counterparts,
but
also
exhibits
unique
dual‐mode
characteristics,
including
persistent
TADF
UOP
high
quantum
yield
58
%
lifetime
362
ms.
precise
stacking
distinctly
reveals
that
intermolecular
interactions
lock
formation
weaken
π‐π
between
NPYC4
Py,
thereby
stabilizing
excited
triplet
excitons.
Furthermore,
favorable
level
acts
as
bridge,
reducing
S
1
T
states
for
therefore
activating
Py.
This
research
provides
direct
insights
into
achieving
co‐crystallization.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(25)
Опубликована: Фев. 6, 2024
Abstract
Afterglow
materials
have
attracted
much
attention
owing
to
their
long
luminescence
lifetimes,
large
Stokes
shifts,
and
emission
without
real‐time
excitation.
Compared
with
traditional
organic
afterglow
materials,
carbon
dots
(CDs),
as
a
new
material,
superior
properties
such
easy
preparation,
low
toxicity,
cost.
The
color
of
CDs
can
be
regulated
by
external
factors
excitation
wavelength,
temperature,
time,
which
is
highly
significant
for
expanding
the
diversified
applications
make
them
available
biotechnology
information
applications.
This
review
summarizes
research
progress
multicolor
in
recent
years,
including
regulation
strategies,
preparation
methods,
First,
are
classified
into
three
strategies:
room
temperature
phosphorescence
(RTP),
thermally
activated
delayed
fluorescence
converted
RTP,
based
on
Förster
resonance
energy
transfer,
strategies
regulating
analyzed.
Second,
methods
achieving
summarized
both
matrix‐free
matrix‐confined
aspects.
Then,
anticounterfeiting
encryption,
sensing
bioimaging
introduced
detail.
Finally,
future
challenges
opportunities
prospected
provide
ideas
controlled
design
wide
application.
Abstract
Advancing
a
metal‐free
room
temperature
phosphorescent
(RTP)
material
that
exhibits
multicolor
emission,
remarkable
RTP
lifetime,
and
high
quantum
yield
still
faces
the
challenge
of
achieving
intersystem
crossing
between
singly
triplet
excited
states,
as
well
rapid
decay
states
due
to
nonradiative
losses.
In
this
study,
novel
strategy
is
proposed
address
these
limitations
by
incorporating
o‐phenylenediamine,
which
generates
multiple
luminescent
centers,
long‐chain
polyacrylic
acid
synthesize
carbonized
polymer
dots
(CPDs).
These
CPDs
are
then
embedded
in
rigid
B
2
O
3
matrix,
effectively
limiting
losses
through
synergistic
effects
cross‐linking
matrix.
The
resulting
CPD‐based
materials
exhibit
ultralong
phosphorescence
shades
blue
lime
green,
with
visible
lifetime
up
49
s
yield.
Simultaneously,
study
demonstrates
practical
applicability
excellent
properties
anti‐counterfeiting
information
encryption.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 13, 2024
The
combination
of
advanced
photoluminescence
characteristics
to
photochromism
is
highly
attractive
in
preparing
high-performance
multifunctional
photo-responsive
materials
for
optoelectronic
applications.
However,
this
rather
challenging
material
design
owing
the
limited
mechanism
understanding
and
construction
principles.
Here,
an
effective
strategy
integrate
afterglow
emission
carbon
dots
(CDs)
proposed
through
embedding
naphthaleneimide
(NI)
structure
CDs
followed
by
polyvinylpyrrolidone
(PVP)
encapsulation.
NI-structured
CDs-PVP
shows
intrinsic
situ
formation
NI-radical
anions
controllable
multi-stimuli-responsive
behaviors
related
oxygen-trigged
triplet
exciton
quenching
Förster
resonance
energy
transfer
(FRET)
from
pristine
photoactivated
radicals.
Notably,
a
wide
range
appearance
colors
colorless
brown,
luminescence
color
transition
blue
yellow,
much
elongated
lifetime
up
253
ms
are
observed.
With
extraordinary
stimuli-chromic
stimuli-luminescent
film
dynamically
responsive
multiple
external
stimuli,
reversible
secure
snapchat,
data
encryption/decryption
synaptic
imaging
recognition
realized.
These
findings
demonstrate
fundamental
principle
photochromic
with
afterglow,
providing
important
understandings
on
synergic
dynamic
thereby
expanding
their
applications
information
anti-counterfeiting
artificial
intelligence.
Analytical Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 8, 2025
Fluorescence
lateral
flow
immunoassays
(FL-LFIA)
have
attracted
considerable
attention
in
clinical
diagnosis
due
to
their
outstanding
merits
of
affordable,
sensitive,
on-site,
and
quick
detection.
However,
they
are
still
plagued
by
significant
signal
interference,
such
as
autofluorescence
scattered
light.
The
development
high-performance
robust
phosphors,
i.e.,
label
probes
featuring
with
the
character
low/no
optical
background,
remains
a
great
challenge.
Herein,
we
report
novel
visualized
phosphorescence
LFIA
(Phos-LFIA),
where
composite
microspheres,
carbon
dots
(CDs)
covalently
embedded
dendritic
mesoporous
silicon
nanoparticles
(DMSNs),
were
designed
selected
probes.
obtained
CDs@DMSNs
revealed
uniform
morphologies
particle
sizes,
well
ultralong
(lifetime:
1.14
s,
visible
for
over
8
s
naked
eyes)
room
temperature
(RTP)
aqueous
solution.
As
competitive
nanotags,
an
phosphorescence-based
time-gated
cardiac
troponin
I
(cTnI)
without
interference.
fabricated
Phos-LFIA
test
strips
demonstrated
zero-background
applied
highly
sensitive
cTnI
detection
both
buffer
complex
serum
matrix,
corresponding
limits
(LODs)
0.19
0.21
ng/mL,
respectively.
For
validation,
proposed
excellent
analytical
performance
(sensitivity:
95.45%,
specificity:
88.9%,
κ
value:
0.85),
demonstrating
its
potential
rapid
accurate
myocardial
infarction.
This
work
provided
promising
background-free
probe
FL-LFIA,
it
would
also
open
opportunity
developing
screening
platforms
other
targets
through
modifying
different
recognition
ligands
onto
CDs@DMSNs.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
12(24), С. 8668 - 8679
Опубликована: Янв. 1, 2024
This
review
article
provides
a
comprehensive
overview
of
the
latest
developments
in
visible-light-excited
RTP
CDs,
which
includes
luminescence
mechanisms,
preparation
strategies,
property
regulation,
and
potential
applications.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 9, 2024
Abstract
The
explosive
growth
of
information
and
its
widespread
availability
underscores
the
need
for
robust
encryption
anticounterfeiting
measures.
In
this
study,
CdS
quantum
dots
are
engineered
(QDs)
to
manifest
multiple
visual
responses
a
single
trigger
through
strategic
ligand
design.
surface
engineering
method
allows
QDs
transition
from
yellow
black
upon
photoexcitation‐induced
electron
transfer
Cd(II)
Cd(0).
Surface
ligands
desorption
under
hole
injection,
leading
an
increase
in
size
resulting
redshift
photoluminescence.
This
redox
reaction
reveals
unprecedented
photochromism
photoluminescence
phenomena,
establishing
foundation
advanced
protection
Utilizing
these
QDs,
excellent
writing
performance
UV
irradiation
is
achieved
solid‐state
substrates,
while
dual‐mode
system
realized
gel
matrices,
opening
up
new
avenues
as
well
cumulative
interactive
protection.
Furthermore,
employed
ink
3D
printing,
enabling
creation
digitally
programmable
materials
with
distinct
temporally
evolving
appearances
by
controlling
oxygen
content
regulate
rate
photochromism.
advancement
also
sheds
light
on
progress
printing
technology.
