Chemistry - An Asian Journal,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 19, 2024
Abstract
An
assembly
of
metal
nanoclusters
driven
by
appropriate
surface
ligands
and
solvent
environment
may
engender
entirely
new
photoluminescence
(PL).
Herein,
we
first
synthesize
histidine
(His)
stabilized
copper
nanoparticles
(CuNPs)
and,
subsequently,
(CuNCs)
from
it
using
3‐mercaptopropionic
acid
(MPA)
as
an
etchant.
The
CuNCs
originally
emit
bluish‐green
(λ
em
=470
nm)
PL
with
a
low
quantum
yield
(QY∼1.8
%).
However,
transformed
into
dual‐emissive
nanocluster
(Zn‐CuNCs)
in
the
presence
Zn(II)
salt,
having
distinct
blue
emission
band
=420
red
=615
eight
times
QY
(∼9.1
%)
enhancement.
temperature‐dependent
spectra
Zn‐CuNCs
depicted
that
persists
for
all
temperature
ranges
(0–80
°C)
while
vanishes
at
high
temperatures
(70–80
°C).
Thus,
originate
locally
excited
state
(LES)
nanoclusters,
originates
through‐space
interaction
(TSI)
Cu(I)…Cu(I)
within
assembly.
Adding
dimethyl
sulfoxide
(DMSO)
further
modifies
intensities;
was
amplified
four
times,
diminished
2.5
times.
transmission
electron
microscopy
(TEM)
images
unveiled
are
large
tiny
which
become
more
compact
DMSO.
possesses
steady‐state
fluorescence
anisotropy,
shows
no
anisotropy.
Further,
near‐perfect
white
light
emission(WLE)
rendered
CIE
coordinates
(0.33,
0.32)
combining
dual
original
green
CuNCs.
Comprehensive Reviews in Food Science and Food Safety,
Journal Year:
2023,
Volume and Issue:
22(4), P. 2977 - 3010
Published: May 18, 2023
Abstract
Aggregates
often
exhibit
modified
or
completely
new
properties
compared
with
their
molecular
elements,
making
them
an
extraordinarily
advantageous
form
of
materials.
The
fluorescence
signal
change
characteristics
resulting
from
aggregation
endow
aggregates
high
sensitivity
and
broad
applicability.
In
aggregates,
the
photoluminescence
at
level
can
be
annihilated
elevated,
leading
to
aggregation‐causing
quenching
(ACQ)
aggregation‐induced
emission
(AIE)
effects.
This
in
intelligently
introduced
food
hazard
detection.
Recognition
units
combine
aggregate‐based
sensor
by
joining
process,
endowing
specificity
analytes
(such
as
mycotoxins,
pathogens,
complex
organic
molecules).
this
review,
mechanisms,
structural
fluorescent
materials
(including
ACQ/AIE‐activated),
applications
detection
(with/without
recognition
units)
are
summarized.
Because
design
sensors
may
influenced
components,
sensing
mechanisms
different
were
described
separately.
Details
materials,
including
conventional
dyes,
carbon
nanomaterials,
quantum
dots,
polymers
polymer‐based
nanostructures
metal
nanoclusters,
units,
such
aptamer,
antibody,
imprinting,
host–guest
recognition,
discussed.
addition,
future
trends
developing
technology
monitoring
hazards
also
proposed.
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(2), P. 461 - 470
Published: Jan. 8, 2024
The
real-time
monitoring
of
the
stepwise
growth
process
molecular
crystal
reveals
a
conclusive
understanding
morphological
evolution,
which
otherwise
remains
elusive
during
conventional
crystallization
processes.
Herein,
we
report
The Journal of Physical Chemistry B,
Journal Year:
2023,
Volume and Issue:
127(30), P. 6608 - 6619
Published: July 20, 2023
The
understanding
of
interactions
between
organic
chromophores
and
biocompatible
luminescent
noble
metal
nanoclusters
(NCs)
leading
to
an
energy
transfer
process
that
has
applications
in
light-harvesting
materials
is
still
its
nascent
stage.
This
work
describes
a
photoluminescent
supramolecular
assembly,
made
two
stages,
employing
silver
(Ag)
NCs
as
the
donor
host-guest
system
acceptor
can
find
potential
diverse
fields.
Initially,
we
explored
chemistry
cationic
guest
ethidium
bromide
cucurbit[8]uril
host
modulate
fluorescence
property
acceptor.
were
characterized
by
using
UV-vis
absorption,
steady-state
time-resolved
spectroscopy,
molecular
docking,
proton
1H
nuclear
magnetic
resonance
(NMR)
mass
spectrometry,
isothermal
calorimetry
studies.
Next,
prepared
series
blue-emitting
AgNCs
different
templates
such
proteins
peptides.
We
have
found
these
be
employed
upon
mixing
with
above
for
emission
color
tuning.
Our
in-depth
studies
also
revealed
surface
ligands
could
play
key
role
modulating
efficiency.
Overall,
noncovalent
strategy,
tried
develop
Förster
(FRET)
pairs
complex
constructing
advanced
sustainable
light-harvesting,
white
light-emitting,
anti-counterfeiting
materials.
Nano Letters,
Journal Year:
2023,
Volume and Issue:
23(16), P. 7683 - 7690
Published: Aug. 10, 2023
Although
renal-clearable
luminescent
metal
nanoparticles
(NPs)
have
been
widely
developed,
their
application
to
efficient
cancer
therapy
is
still
limited
due
low
reactive
oxygen
species
(ROS)
production.
Here,
a
novel
system
of
clearable
mercaptosuccinic
acid
(MSA)
coated
Au–Ag
bimetallic
NPs
designed
enhance
ROS
The
results
show
that
the
strong
COO–Ag
coordination
bonds
between
carboxylic
groups
MSA
and
Ag
atoms
on
could
construct
high-rigidity
interlocked
surface
motifs
restrict
intrananoparticle
motions
for
enhanced
generation.
Moreover,
exhibit
pH-responsive
self-assembly
capability
under
acidic
environment
inside
lysosomes
cells
at
both
in
vitro
vivo,
restricting
internanoparticle
further
boost
well-designed
high
tumor
targeting
efficiency,
fast
elimination
from
body
through
rapid
liver
biotransformation,
extensive
destruction
cells,
resulting
good
security
prominent
therapeutic
performance.
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(18), P. 4880 - 4889
Published: April 29, 2024
Assembling
metal
nanoclusters
(MNCs)
to
form
superstructures
generates
exciting
photophysical
properties
distinct
from
those
of
their
discrete
precursors.
Controlling
the
assembly
process
MNCs
and
understanding
assembly-disassembly
dynamics
can
have
implications
in
achieving
reversible
self-assembly
MNCs.
The
formation
self-assembled
copper
(CuNCs)
as
homogeneous
underlying
mechanisms
governing
such
a
remain
unexplored.
Smart
molecular
imprinting
surface
ligands
establish
forces
necessary
for
superstructures.
Herein,
we
report
highly
luminescent,
ordered
4-phenylimidazole-2-thiol
(4-PIT)-protected
CuNCs
with
help
l-ascorbic
acid
secondary
ligand.
Through
comprehensive
spectroscopic
analysis,
deciphered
mechanism
process,
where
role
interligand
H-bonding
C-H-π
interactions
was
established.
Notably,
efficient
reversibility
demonstrated
by
re-establishing
regenerating
morphological
signatures.
Nanoscale,
Journal Year:
2023,
Volume and Issue:
15(37), P. 15368 - 15381
Published: Jan. 1, 2023
Inter-cluster
conversion
through
the
strategic
tuning
of
external
stimuli
and
thereby
modulation
optical
properties
metal
nanoclusters
(MNCs)
is
an
emerging
domain
for
exploration.
Herein,
we
report
preparation
blue-emitting
CuNCs
using
phenylalanine
(Phe)
as
a
template
under
acidic
conditions
(pH
∼
4).
The
as-prepared
exhibit
sequential
photophysical
upon
varying
pH
solution
from
∼4
to
∼12.
Blue-emitting
(B-CuNCs,
λem
=
410
nm)
are
systematically
converted
cyan-emitting
(C-CuNCs,
490
with
large
red-shifted
emission
maximum
by
80
nm
function
pH.
Our
present
investigation
delineates
unprecedented
switchability
photoluminescence
(PL)
variations
Both
Phe-templated
(B-CuNCs
C-CuNCs)
were
broadly
characterized
various
spectroscopic
morphological
techniques.
X-ray
photoelectron
spectroscopy
(XPS)
studies
reveal
presence
different
oxidation
states
in
metallic
core
B-CuNCs
C-CuNCs.
These
results
turn
substantiate
pH-induced
intercluster
substantial
change
their
composition
well
valence
states.
Owing
sensitivity,
act
efficient
highly
sensitive
probe
CO2,
quantitative
estimation
dissolved
CO2
form
bicarbonate
ions
has
been
achieved
enhancement
PL
intensity,
wherein
very
low
value
limit
detection
(LOD)
∼60
μM
was
obtained.
Furthermore,
demonstrated
that
bio-catalyst
peroxidase
mimicking
enzymatic
activity
which
investigated
OPD
substrate
physiological
∼7.4
temperature
∼37
°C).
mechanistic
investigations
confirmed
mainly
proceeds
generation
hydroxyl
radicals
(˙OH).
We
hope
shed
light
on
multidimensional
aspect
MNCs
uncover
upsurging
recent
interest
artificial
enzyme.
