ACS Applied Nano Materials,
Journal Year:
2024,
Volume and Issue:
7(11), P. 13736 - 13744
Published: May 31, 2024
Although
carbon
dots
(CDs)
have
been
widely
investigated
as
the
fluorescence
material,
research
on
room
temperature
phosphorescence
(RTP)
CDs
is
still
limited.
In
this
work,
diethylenetriaminepentaacetic
acid
(DTPA)
was
employed
raw
material
to
synthesize
quantum
(denoted
CQDs-1)
by
a
hydrothermal
method.
The
resulting
CQDs-1
inherited
C═O
groups
and
N
atoms
from
DTPA,
which
promoted
formation
of
triplet
excitons
under
light
excitation.
On
basis,
were
dispersed
in
poly(vinyl
alcohol)
(PVA)
matrix
prepare
CQDs-1-PVA
composites
that
exhibited
an
optimal
emission
peak
at
∼466
nm
emitted
visible
afterglow
lasting
for
8
s.
Moreover,
tartaric
(TA)
combined
with
DTPA
CQDs-2,
induced
π–π
conjugated
areas
CQDs.
As
result,
wavelength
slightly
red-shifted,
duration
time
CQDs-2-PVA
composite
increased
9
Due
ultralong-lifetime
RTP
properties
CQDs-based
composites,
their
applications
fields
information
encryption
anticounterfeiting
also
investigated.
Overall,
our
work
offered
convenient
avenue
synthesis
high-quality
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(18), P. 11047 - 11136
Published: Sept. 7, 2023
Advances
in
nanotechnology
and
nanomaterials
have
attracted
considerable
interest
play
key
roles
scientific
innovations
diverse
fields.
In
particular,
increased
attention
has
been
focused
on
carbon-based
exhibiting
extended
structures
unique
properties.
Among
these
materials,
zero-dimensional
structures,
including
fullerenes,
carbon
nano-onions,
nanodiamonds,
dots,
possess
excellent
bioaffinities
superior
fluorescence
properties
that
make
suitable
for
application
to
environmental
biological
sensing,
imaging,
therapeutics.
This
review
provides
a
systematic
overview
of
the
classification
structural
properties,
design
principles
preparation
methods,
optical
sensing
applications
nanomaterials.
Recent
interesting
breakthroughs
sensitive
selective
imaging
heavy
metal
pollutants,
hazardous
substances,
bioactive
molecules
as
well
information
encryption,
super-resolution
photoacoustic
phototherapy
nanomedicine
delivery
are
main
focus
this
review.
Finally,
future
challenges
prospects
materials
highlighted
envisaged.
presents
comprehensive
basis
directions
designing,
developing,
applying
fascinating
fluorescent
sensors
fabricated
based
specific
requirements
numerous
research
Small,
Journal Year:
2023,
Volume and Issue:
19(33)
Published: April 22, 2023
Abstract
Room
temperature
phosphorescence
(RTP)
materials
have
drawn
considerable
attention
by
virtue
of
their
outstanding
features.
Compared
with
organometallic
complexes
and
pure
organic
compounds,
carbon
dots
(CDs)
emerged
as
a
new
type
RTP
materials,
which
show
great
advantages,
such
moderate
reaction
condition,
low
toxicity,
cost,
tunable
optical
properties.
In
this
review,
the
important
progress
made
in
CDs
is
summarized,
an
emphasis
on
latest
developments.
The
synthetic
strategies
will
be
comprehensively
followed
detailed
introduction
performance
regulation
potential
applications
anti‐counterfeiting,
information
encryption,
sensing,
light‐emitting
diodes,
biomedicine.
Finally,
remaining
major
challenges
for
are
discussed
opportunities
future
proposed.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(23)
Published: April 6, 2023
The
emergence
of
time-dependent
phosphorescence
color
(TDPC)
materials
has
taken
information
encryption
to
high-security
levels.
However,
due
the
only
path
exciton
transfer,
it
is
almost
impossible
obtain
TDPC
for
chromophores
with
a
single
emission
center.
Theoretically,
in
inorganic-organic
composites,
transfer
organic
depends
on
inorganic
structure.
Here,
we
assign
two
structural
effects
NaCl
by
metal
(Mg2+
or
Ca2+
Ba2+
)
doping,
which
triggers
performance
carbon
dots
(CDs)
resulting
material
used
multi-level
dynamic
3D
coding
achieve
encryption.
confinement
activates
green
CDs;
while
defect
tunneling-related
yellow
phosphorescence.
Such
simply
doped
matrices
can
be
synthesized
using
periodic
table
cations,
endowing
tremendous
control
over
properties.
This
demonstration
extends
design
view
luminescent
materials.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(31)
Published: May 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,
Journal Year:
2024,
Volume and Issue:
36(27)
Published: April 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.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(25)
Published: Feb. 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.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(12), P. 4222 - 4237
Published: Jan. 1, 2024
In
this
perspective,
the
progress
in
ion-regulated
organic
RTP
materials
and
described
roles
of
ions,
including
ion–π
interactions,
electrostatic
coordinate
have
been
summarized.
