Thermally Activated Delayed Fluorescence-Based Near-Infrared-II Luminescence and Controlled Size Growth of Silver Nanoclusters
Wenhui Jiang,
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Xiang-Ming Zeng,
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Minjian Wu
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et al.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Due
to
the
significant
relationships
between
structure
and
properties,
controlled
construction
of
atomically
precise
metal
clusters
presents
both
a
formidable
challenge
great
importance.
The
innovative
synthesis
well-defined
silver
nanoclusters
with
near-infrared
II
(NIR-II)
luminescent
properties
may
inspire
further
exploration
functional
for
bioimaging
applications.
In
this
study,
we
employed
multidentate
chelating
nitrogen
ligand
3,5-di(2-pyridyl)pyrazole
(Hbpypz)
construct
three
unprecedented
nanoclusters:
[Ag27(bpypz)14]3+
(Ag27),
[Ag62(bpypz)18]6+
(Ag62),
[Ag91(bpypz)24]5+
(Ag91).
Single-crystal
X-ray
analysis
indicated
that
these
cluster
structures
stem
from
Ag13
units,
exhibiting
cluster-of-cluster
configurations.
By
modulating
stoichiometry
centers,
achieved
size
growth
reversible
cluster-to-cluster
conversions
among
nanoclusters.
Notably,
Ag27
nanocluster
exhibits
an
interesting
thermally
activated
delayed
fluorescence
(TADF)
based
luminescence
in
second
region
demonstrates
high
catalytic
efficiency
oxidative
coupling
benzylamines
via
singlet
oxygen
(1O2)
oxidation
mechanism.
Language: Английский
Halide Ion-Templated Atomic Precision Synthesis and Structural Modulation of Silver Sulfide Nanoclusters
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
Abstract
In
the
realm
of
nanomaterials
science,
precise
and
controllable
synthesis
nanoclusters
remains
a
formidable
challenge.
This
study
focuses
on
silver
sulfide
via
halide
ion
template
method,
with
an
in
-
depth
exploration
underlying
mechanism.
By
meticulously
regulating
halogen
concentration,
reaction
solvent,
other
parameters,
diverse
array
distinct
structures
has
been
successfully
fabricated
characterized
at
atomic
precision
level
using
X-ray
single
crystal
diffraction.
The
results
clearly
demonstrate
that
concentration
exerts
profound
influence
structural
characteristics
clusters.
Different
ions
can
trigger
formation
disparate
nucleation
sites
structures,
choice
solvent
also
plays
crucial
role
determining
properties
Language: Английский
Halide Ion-Templated Atomic Precision Synthesis and Structural Modulation of Silver Sulfide Nanoclusters
Journal of Cluster Science,
Journal Year:
2025,
Volume and Issue:
36(2)
Published: March 7, 2025
Language: Английский
Recent Advances in Understanding Triplet States in Metal Nanoclusters: Their Formation, Energy Transfer, and Applications in Photon Upconversion
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
unknown, P. 12257 - 12268
Published: Dec. 5, 2024
Recent
experimental
findings,
rapidly
accumulating
over
the
past
few
years,
has
revealed
that
in
electronic
excited
states
of
metal
nanoclusters
(MNCs)
composed
noble
atoms
(e.g.,
Cu,
Ag,
or
Au),
triplet
are
generated
with
remarkably
high
efficiency,
exerting
a
pivotal
influence
photophysical
properties
MNCs,
notably
their
photoluminescence
characteristics.
As
result,
MNCs
increasingly
recognized
as
promising
luminescent
nanomaterials
exhibit
room-temperature
phosphorescence
and
thermally
activated
delayed
fluorescence.
Furthermore,
significance
triplet-state-mediated
energy
transfer
charge
intermolecular
processes
is
gaining
increasing
recognition,
particularly
applications
photosensitizers
for
singlet
oxygen
organic
molecular
triplets.
This
Perspective
focuses
on
recent
advances
understanding
formation
photophysics
MNCs.
Additionally,
brief
overview
provided
series
studies
exploring
use
sensitizers
photon
upconversion
via
triplet-triplet
annihilation,
future
prospects
this
emerging
application
discussed.
Language: Английский