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.
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
