The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
128(9), С. 3824 - 3831
Опубликована: Фев. 28, 2024
The
interfacial
electron-transfer
reaction
in
ligand-protected
gold
clusters
(AuCs)
has
been
extensively
investigated,
but
there
are
limited
reports
on
organic
chromophore
ligands
for
photoinduced
reactions
of
chromophore-attached
AuCs.
Here,
we
focused
porphyrins
as
because
their
tunable
redox
properties
through
the
insertion
metal
ions.
We
synthesized
1.3
nm
diameter
AuCs
face-coordinated
by
free-base
porphyrin
(H2P)
or
AuIII
(AuP+)
photofunctional
ligands.
H2P-
and
AuP+-protected
(H2P-AuCs
AuP+-AuCs)
were
characterized
transmission
electron
microscopy,
X-ray
photoelectron
spectroscopy,
ultraviolet–visible–near-infrared
absorption
spectroscopy.
Femtosecond
transient
measurements
revealed
photodynamics
H2P-AuCs
AuP+-AuCs.
AuP+-AuCs
act
acceptors
donors,
respectively,
achieving
control
direction
inserting
ion
into
ligand.
This
drastic
change
is
caused
high
electrophilicity
AuP+,
indicating
that
precise
design
protecting
ligand
can
expand
potential
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(27)
Опубликована: Апрель 23, 2024
Designing
luminophores
bright
in
both
isolate
species
and
aggregate
states
is
of
great
importance
many
emerging
cutting-edge
applications.
However,
the
conventional
either
emit
but
quench
state
or
darken
species.
Here
we
demonstrate
that
precise
regulation
noncovalent
interactions
can
realize
states.
It
firstly
discovered
intra-cluster
interaction
enhances
emission
atomically
Au
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Авг. 22, 2024
It
is
challenging
to
attain
strong
near-infrared
(NIR)
emissive
gold
nanoclusters.
Here
we
show
a
rod-shaped
cluster
with
the
composition
of
[Au28(p-MBT)14(Hdppa)3](SO3CF3)2
(1
for
short,
Hdppa
N,N-bis(diphenylphosphino)amine,
p-MBT
4-methylbenzenethiolate)
has
been
synthesized.
Single
crystal
X-ray
structural
analysis
reveals
that
it
rod-like
face-centered
cubic
(fcc)
Au22
kernel
built
from
two
interpenetrating
bicapped
cuboctahedral
Au15
units.
1
features
NIR
luminescence
an
emission
maximum
at
920
nm,
and
photoluminescence
quantum
yield
(PLQY)
12%,
which
30-fold
[Au21(m-MBT)12(Hdppa)2]SO3CF3
(2,
m-MBT
3-methylbenzenethiolate)
similar
60-fold
Au30S(S‑t‑Bu)18
structure.
time-dependent
DFT(TDDFT)calculations
reveal
associated
kernel.
The
small
Stokes
shift
indicates
very
excited
state
distortion,
leading
high
radiative
decay
rate
(kr)
probability.
mixture
phosphorescence
thermally
activated
delayed
fluorescence(TADF),
enhancement
mainly
due
promotion
kr
rather
than
inhibition
knr.
This
work
demonstrates
metal
surface
structure
are
both
important
cluster-based
materials.
Gold
nanoclusters
emissions
in
attain.
Here,
authors
nanoclusters,
shape
kernal
rigid
increase
emissions.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июнь 12, 2024
Abstract
To
date,
earlier
diagnosis
of
Alzheimer’s
disease
(AD)
is
still
challenging.
Recent
studies
revealed
the
elevated
expression
connective
tissue
growth
factor
(CTGF)
in
AD
brain
an
upstream
regulator
amyloid-beta
(Aβ)
plaque,
thus
CTGF
could
be
diagnostic
biomarker
than
Aβ
plaque.
Herein,
we
develop
a
peptide-coated
gold
nanocluster
that
specifically
targets
with
high
affinity
(KD
~
21.9
nM).
The
probe
can
well
penetrate
blood-brain-barrier
(BBB)
APP/PS1
transgenic
mice
at
early-stage
(earlier
3-month-old)
vivo,
allowing
non-invasive
NIR-II
imaging
when
there
no
appearance
plaque
deposition.
Notably,
this
also
applied
to
measuring
on
postmortem
sections
by
multimodal
analysis,
including
fluorescence
imaging,
peroxidase-like
chromogenic
and
ICP-MS
quantitation,
which
enables
distinguishment
between
brains
patients
healthy
people.
This
possesses
great
potential
for
precise
before
formation.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(34)
Опубликована: Май 28, 2024
Circularly
polarized
light
(CPL)
detection
is
of
great
significance
in
various
applications
such
as
drug
identification,
sensing
and
imaging.
Atomically
precise
chiral
metal
nanoclusters
with
intense
circular
dichroism
(CD)
signals
are
promising
candidates
for
CPL
detection,
which
can
further
facilitate
device
miniaturization
integration.
Herein,
we
report
the
preparation
a
pair
optically
active
silver
[Ag
Chemical & Biomedical Imaging,
Год журнала:
2024,
Номер
2(7), С. 462 - 480
Опубликована: Июнь 18, 2024
In
the
realm
of
nanomaterials,
atomically
precise
quasi-molecular
gold
nanoclusters
(AuNCs)
play
a
prime
role
due
to
their
unique,
stable,
and
highly
tunable
optical
properties.
They
are
extensively
structure-engineered
for
modulation
surface
electronic
states
toward
long
wavelength
photoluminescence,
particularly
in
NIR-II
(1000
1700
nm)
window.
Contrast
agents
with
emission
can
potentially
transform
imaging
terms
higher
spatial
resolution,
deeper
tissue
penetration,
reduced
autofluorescence.
These
advantages
allow
real-time
living
organisms
observing
disease
progression
treatment
response.
this
short
review,
we
discuss
origin
rationally
designed
AuNCs
application
high
resolution
vasculatures
hard
soft
structures
identification
pathological
conditions
such
as
stroke
injury.
Further,
recent
employment
these
rapidly
growing
field
tumor
theranostics
is
also
summarized.
Final
remarks
provided
on
scope
improvement
properties
persisting
challenges
clinical
translation.
Nanoscale,
Год журнала:
2024,
Номер
16(15), С. 7419 - 7426
Опубликована: Янв. 1, 2024
The
synthesis
of
atomically
precise
gold
nanoclusters
with
high
photoluminescence
quantum
yield
(PLQY)
in
the
near-infrared
(NIR)
region
and
understanding
their
mechanism
are
crucial
for
both
fundamental
science
practical
applications.
Herein,
we
report
a
highly
luminescent,
molecularly
pure
Au
