JACS Au,
Journal Year:
2024,
Volume and Issue:
4(5), P. 1928 - 1934
Published: April 16, 2024
An
Au36(S-tBu)22
nanocluster
(NC)
is
synthesized
using
the
bulky
tert-butyl
thiol
as
ligand.
Single-crystal
X-ray
crystallography
reveals
that
it
has
an
Au25
core
which
evolves
from
Au22
in
previously
reported
Au30(S-tBu)18,
and
protected
by
longer
staple-like
surface
motifs.
The
new
Au36
NC
extends
members
of
face-centered
cubic
structural
evolution
adding
Au3
triangle
Au4
tetrahedron
unit.
Additionally,
found
emits
near-infrared
photoluminescence
at
863
nm
with
a
quantum
yield
(QY)
4.3%,
five
times
larger
than
Au30(S-tBu)18─the
closest
neighbor
pattern.
higher
QY
attributed
to
radiative
relaxation
(kr),
resulting
effect.
Finally,
we
find
staple
motifs
lead
enhanced
stability
relative
Au30(S-tBu)18.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(27)
Published: April 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,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Aug. 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,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: June 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.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
16(15), P. 7419 - 7426
Published: Jan. 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
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(34)
Published: May 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,
Journal Year:
2024,
Volume and Issue:
2(7), P. 462 - 480
Published: June 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.
National Science Review,
Journal Year:
2024,
Volume and Issue:
11(7)
Published: May 28, 2024
ABSTRACT
Chemically
modified
superatoms
have
emerged
as
promising
candidates
in
the
new
periodic
table,
which
Au13
and
its
doped
MnAu13−n
been
widely
studied.
However,
their
important
counterpart,
Ag13
artificial
element,
has
not
yet
synthesized.
In
this
work,
we
report
synthesis
of
nanoclusters
using
strong
chelating
ability
rigid
ligands,
that
fills
gaps
icosahedral
superatomic
metal
clusters.
After
further
doping
template
with
different
degrees
Au
atoms,
gained
insight
into
evolution
optical
properties.
Theoretical
calculations
show
kernel
can
modulate
transition
excited-state
electronic
structure,
electron
transfer
process
changes
from
local
excitation
(LE)
to
charge
(CT)
LE.
This
study
only
enriches
families
superatoms,
but
also
contributes
understanding
states
