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 Materials & Interfaces,
Год журнала:
2024,
Номер
16(21), С. 27804 - 27812
Опубликована: Май 17, 2024
Monitoring
and
purification
of
uranium
contamination
are
great
importance
for
the
rational
utilization
resources
maintaining
environment.
In
this
work,
an
olefin-linked
covalent
organic
framework
(GC-TFPB)
its
amidoxime-modified
product
(GC-TFPB-AO)
synthesized
with
3-cyano-4,6-dimethyl-2-hydroxypyridine
(GC)
1,3,5-tris(4-formylphenyl)
benzene
(TFPB)
by
Knoevenagel
condensation.
GC-TFPB-AO
results
in
specificity
rapid
fluorescent/smartphone
uranyl
ion
(UO22+)
detection
based
on
synergistic
effect
multifunctional
groups
(amidoxime,
pyridine,
hydroxyl
groups).
features
a
highly
sensitive
adsorption
UO22+
limit
21.25
nM.
addition,
it
has
good
recovery
(100–111%)
fluorescence
real
samples,
demonstrating
excellent
potential
predesigned
fluorescent
COFs
nuclear
contaminated
wastewater
removal.
