Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 29, 2024
Abstract
Covalent
Organic
Frameworks
(COFs)
exhibit
a
range
of
exceptional
attributes,
including
notable
porosity,
outstanding
stability,
and
precisely
tuned
π‐conjugated
network,
rendering
them
highly
promising
candidates
for
fluorescence
sensors
applications.
In
this
study,
the
synthesis
two
emissive
hydrazone‐linked
COFs
designed
hydrazine
detection
is
presented.
The
partially
conjugated
structure
hydrazone
linkage
effectively
weakens
quenching
processes
induced
by
aggregation.
Additionally,
incorporation
flexible
structural
components
further
reduces
conjugation,
thereby
enhancing
luminescent
efficiency.
Remarkably,
these
possess
significant
abundance
heteroatoms,
enabling
distinctive
interactions
with
molecules,
which
in
turn
results
selectivity
sensitivity
detection.
limit
reaches
nanomolar
range,
surpassing
all
previously
reported
COFs,
underscoring
their
superior
performance
chemical
sensing
ACS Applied Nano Materials,
Год журнала:
2023,
Номер
6(23), С. 21721 - 21732
Опубликована: Ноя. 17, 2023
The
β-NaYF4:Yb,Tm,Gd/Ni-MOF
(UCNR/Ni-MOF,
UNM)
nanocomposites
were
successfully
synthesized
via
a
simple
two-step
hydrothermal
method.
Excited
by
980
nm
laser,
UCNRs
produce
ultraviolet
and
visible
light,
activating
the
Ni-MOF
generating
significant
quantity
of
electron/hole
pairs
(e–/h+).
These
e–/h+
can
then
react
with
O2
H2O
to
create
reactive
oxygen
species
(ROS),
which
be
used
for
antibacterial
purposes.
Characterization
techniques
including
transmission
electron
microscopy
(TEM),
X-ray
diffraction
(XRD),
Fourier
transform
infrared
spectroscopy
(FTIR)
utilized
analyze
structure,
optical
properties,
composition,
morphology
UNM
nanocomposites.
photocatalytic
performance
was
evaluated
testing
its
ability
kill
E.
coli
S.
aureus
as
well
degrade
rhodamine
B
(RhB)
under
near-infrared
light
irradiation
(1.0
W/cm2).
After
18
min
reaction,
bactericidal
rates
against
observed
roughly
100
99.99%,
respectively.
Similarly,
∼98.49%
RhB
degraded
within
180
min.
Free
radical
capture
experiments
conducted
further
investigate
mechanism
photocatalysis.
main
active
involved
determined
·O2–
h+.
In
addition,
able
retain
∼86.25%
degradation
rate
toward
after
four
cycles
cycling
experiments,
demonstrated
good
stability.
Therefore,
this
study
provides
potential
strategy
eliminate
bacteria
hazardous
pollutants
in
order
mitigate
environmental
pollution.
Macromolecular Rapid Communications,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 29, 2024
Abstract
Covalent
Organic
Frameworks
(COFs)
exhibit
a
range
of
exceptional
attributes,
including
notable
porosity,
outstanding
stability,
and
precisely
tuned
π‐conjugated
network,
rendering
them
highly
promising
candidates
for
fluorescence
sensors
applications.
In
this
study,
the
synthesis
two
emissive
hydrazone‐linked
COFs
designed
hydrazine
detection
is
presented.
The
partially
conjugated
structure
hydrazone
linkage
effectively
weakens
quenching
processes
induced
by
aggregation.
Additionally,
incorporation
flexible
structural
components
further
reduces
conjugation,
thereby
enhancing
luminescent
efficiency.
Remarkably,
these
possess
significant
abundance
heteroatoms,
enabling
distinctive
interactions
with
molecules,
which
in
turn
results
selectivity
sensitivity
detection.
limit
reaches
nanomolar
range,
surpassing
all
previously
reported
COFs,
underscoring
their
superior
performance
chemical
sensing
