ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(27), P. 32783 - 32791
Published: June 27, 2023
A
cost-effective
and
environmentally
friendly
approach
is
proposed
for
producing
N-
S-codoped
multicolor-emission
carbon
dots
(N-
MCDs)
at
a
mild
reaction
temperature
(150
°C)
relatively
short
time
(3
h).
In
this
process,
adenine
sulfate
acts
as
novel
precursor
doping
agent,
effectively
reacting
with
other
reagents
such
citric
acid,
para-aminosalicylic
ortho-phenylenediamine,
even
during
solvent-free
pyrolysis.
The
distinctive
structures
of
lead
to
the
increased
amount
graphitic
nitrogen
sulfur
in
MCDs.
Notably,
obtained
MCDs
exhibit
considerable
fluorescence
intensities,
their
emission
color
can
be
adjusted
from
blue
yellow.
observed
tunable
photoluminescence
attributed
variations
surface
state
N
S
contents.
Furthermore,
due
favorable
optical
properties,
good
water
solubility
biocompatibility,
low
cytotoxicity,
these
MCDs,
especially
green
dots,
are
successfully
applied
fluorescent
probes
bioimaging.
affordable
synthesis
method
employed
create
combined
remarkable
offers
promising
avenue
use
various
fields,
particularly
biomedical
applications.
Small,
Journal Year:
2022,
Volume and Issue:
18(51)
Published: Nov. 3, 2022
Abstract
As
a
relatively
new
type
of
fluorescent
carbon‐based
nanomaterials,
multicolor
carbon
dots
(MCDs)
have
attracted
much
attention
because
their
excellent
biocompatibility,
tunable
photoluminescence
(PL),
high
quantum
yield,
and
unique
electronic
physicochemical
properties.
The
emission
characteristics
(CDs)
obviously
depend
on
the
source
precursor,
reaction
conditions,
environment,
which
directly
or
indirectly
determines
CDs.
Therefore,
this
review
is
first
systematic
classification
summary
multiple
regulation
methods
synthetic
MCDs
reviews
recent
research
progress
in
synthesis
from
variety
precursor
materials
such
as
aromatic
molecules,
small
organic
natural
biomass,
focusing
how
different
produce
corresponding
MCDs.
This
also
introduces
innovative
applications
fields
biological
imaging,
light‐emitting
diodes
(LEDs),
sensing,
anti‐counterfeiting
due
to
PL
It
hoped
that
by
selecting
appropriate
adjustment
methods,
can
inspire
guide
future
design
tailored
MCDs,
provide
help
for
development
multifunctional
Chinese Journal of Chemistry,
Journal Year:
2023,
Volume and Issue:
41(9), P. 1007 - 1014
Published: Jan. 14, 2023
Comprehensive
Summary
Solid‐state
fluorescent
multi‐color
carbon
dots
(SFM‐CDs),
prepared
using
the
same
precursor(s)
without
need
for
dispersion
in
a
solid
matrix,
are
highly
demanded
wide
range
of
applications.
Herein,
we
report
microwave‐assisted
strategy
preparation
SFM‐CDs
with
blue,
yellow
and
red
emissions
within
5
min
from
precursors.
The
as‐prepared
B‐CDs,
Y‐CDs,
R‐CDs
possessed
bright
fluorescence
at
425
nm,
550
640
photoluminescence
quantum
yields
(PLQYs)
54.68%,
17.93%,
2.88%,
respectively.
structure
consisted
5‐oxo‐3,5‐dihydro‐2
H
‐thiazolo
[3,2‐
]
pyridine‐7‐carboxylic
acid
(TPCA)
immobilized
on
surface
core,
size
core
degree
disulfide
crosslinking
between
CDs
both
increasing
going
B‐CDs
to
R‐CDs,
as
verified
by
mechanochromic
experiments.
excellent
solid‐state
performance
allowed
their
utilization
converter
layer
LEDs
white
high
color
rendering
index.
Small,
Journal Year:
2023,
Volume and Issue:
19(10)
Published: Jan. 15, 2023
Abstract
Optical
information
encryption
and
safety
have
aroused
great
attention
since
they
are
closely
correlated
to
data
protection
safety.
The
development
of
multiple
stimuli‐response
optical
materials
for
constructing
large‐capacity
is
very
important
practical
applications.
Carbon
dots
(CDs)
many
gratifying
merits,
such
as
polychromatic
emission,
diverse
luminous
categories,
stable
physicochemical
properties,
considered
one
the
most
ideal
candidates
protection.
Herein,
carbon
core,
functional
groups,
solvents,
other
crucial
factors
reviewed
outputting
emission
categories.
In
particular,
substrate
engineering
strategies
been
emphasized
their
critical
role
in
yielding
excellent
features
High‐capacity
by
relying
on
rich
properties
CDs,
categories
fluorescence,
afterglow,
upconversion,
well
external‐stimuli‐assisted
changes.
Some
perspectives
preparing
CDs
further
developing
security
proposed.
This
review
provides
a
good
reference
manipulation
next‐generation
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(41)
Published: June 13, 2023
Abstract
Carbon
dots
(CDs)—carbon
nanoparticles
smaller
than
10
nm—have
attracted
widespread
attention
owing
to
their
excellent
optical
properties.
However,
high‐performing
CDs
often
suffer
from
severe
aggregation‐induced
quenching
in
the
solid
state,
which
limits
commercial
applicability.
Therefore,
CD
materials
with
efficient
solid‐state
luminescence
are
sought.
As
research
on
structure
and
photoluminescence
mechanisms
of
has
intensified
recent
years,
strategies
construct
fluorescent
tune
emissions
have
broadened.
This
article
reviews
advances
for
attaining
fluorescence
CDs,
describes
specific
ways
properties
this
fluorescence,
introduces
latest
applications
resulting
optoelectronics,
biology,
sensing,
finally
considers
prospects
future
application
current
challenges
facing
development
CDs.
Small Structures,
Journal Year:
2023,
Volume and Issue:
4(5)
Published: Feb. 2, 2023
As
emerging
carbon‐based
nanomaterials,
carbon
dots
(CDs)
are
widely
studied
with
regard
to
their
luminescent
properties.
CDs
obtained
by
the
bottom‐up
method
exhibit
polymeric
characteristics
after
crosslinking,
polymerization,
and
incomplete
carbonization
processes,
herein
referred
as
carbonized
polymer
(CPDs).
In
recent
years,
large
progress
has
been
achieved
on
room‐temperature
phosphorescence
(RTP)
properties
of
CPDs.
The
developments
synthesis
strategies
for
RTP
CPD
materials
reviewed.
However,
less
attention
devoted
influence
structures
materials.
Polymer
a
common
feature
extensive
key
factors
facilitating
Herein,
effects
emission
self‐protective
matrix‐assisted
discussed.
It
is
considered
that
can
effectively
immobilize
subluminophores
protect
triplet
excited
states
facilitate
crosslink‐enhanced
(CEE)
effect
proposed
further
explain
materials,
which
provide
an
effective
strategy
Benefiting
from
CEE
effect,
efficient
be
applications
then
briefly
summarized.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(22)
Published: March 31, 2023
Two
kinds
of
triphenylamine-derived
solid-state
emissive
carbon
dots
(CDs)
with
orange
and
yellow
color
are
facilely
synthesized
through
solvothermal
treatment,
taking
advantage
the
nonplanar
structure
good
carrier
mobility
triphenylamine
unit.
Theoretical
calculations
show
that
could
greatly
inhibit
direct
π-π
stacking
aromatic
skeletons
enhance
fluorescence
properties
CDs
in
aggregation
state.
By
adopting
as
single
layer,
high-performance
orange-color
green-color
electroluminescent
light-emitting
diodes
(LEDs)
successfully
fabricated,
maximum
brightness
9450/4236
cd
m-2
,
high
current
efficiency
1.57/2.34
A-1
low
turn-on
voltage
3.1/3.6
eV
respectively
achieved.
Significantly,
white-color
LED
device
is
further
prepared.
This
work
provides
a
universal
platform
for
construction
novel
significant
applications
photoelectric
device.
