Gallic
acid
(GA),
widely
used
in
food
and
medicine
production
industries.
Herein,
a
kind
of
newly
synthesized
cobalt-nitrogen
co-doped
carbon
dots
(Co,N-CDs)
with
dual
functional
properties
oxidase-like
activity
photoluminescence
property
could
oxidize
the
3,3',5,5'-tetramethylbenzidine
(TMB)
to
oxTMB
new
absorption
peak
at
653
nm.
In
addition,
it
was
found
that
performed
fluorescence-quenching
effect
on
Co,N-CDs
440
nm
attributed
FRET
(Fluorescence
resonance
energy
transfer).
Reductive
GA
reduce
TMB,
weaken
blue
color,
restore
fluorescence
Co,N-CDs.
Thus,
colorimetric
fluorometric
method
for
dual-mode
detection
established.
The
synthesis
dual-signal
probe
completed
single
environmental
precursor
just
one
step.
Simultaneously,
reduced
limits,
broadened
linear
range
improved
anti-interference
ability.
This
exhibited
satisfactory
application
prospect
actual
tea
beverages.
ACS Sensors,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 15, 2025
The
high
selectivity
and
reversibility
of
metal
coordination
enable
precise
modulation
the
structural
morphology
supramolecular
assemblies,
which
is
essential
for
development
intelligent
application
functionalized
materials.
In
this
study,
sheet-like
assemblies
(Pyr-O@tQ[14])
constructed
by
twisted
cucurbit[14]urils
(tQ[14])
pyrene
derivatives
(Pyr-O)
through
host-guest
interactions,
exhibit
excellent
optical
properties,
achieves
highly
sensitive
detection
Hg2+
fluorescence
quenching,
with
a
limit
0.177
μM.
A
novel
smart
platform,
compatible
smartphones,
developed
to
enhance
efficiency
practicality
practical
applications.
From
microscopic
perspective,
adjusting
concentration
can
change
Pyr-O@tQ[14]
from
lamellar
square
finally
spherical,
demonstrating
dynamic
control
assembly
structure
in
response
environmental
stimuli.
This
study
not
only
presents
efficient
quantitative
sensing
platform
but
also
highlights
unique
advantages
tQ[14]
constructing
tunable,
responsive
structures,
opening
new
avenues
design
synthesis
advanced
