Food Additives & Contaminants Part A,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 13
Published: Feb. 3, 2025
Kanamycin
(KANA)
plays
a
key
role
in
the
treatment
of
bacterial
infections
and
has
been
widely
used
animal
husbandry.
However,
its
overuse
causes
antibiotic
residues
animal-derived
foods.
Determination
methods
for
KANA
are
urgently
needed
food
safety.
Most
developed
fluorescent
aptamer
sensors
detecting
use
parental
(kana-Apt)
as
recognition
unit.
excessive
bases
tend
to
form
secondary
structures
lead
high
background
or
nonspecific
signals.
In
this
study,
two
based
on
one
(kana1-Apt)
(kana1/kana2-Apt)
split
fragments
were
detection.
The
LODs
kana1-Apt/ThT
system
kana1/kana2-Apt/ThT
systems
4.88
nM
4.53
nM,
respectively.
addition,
satisfactory
recoveries
obtained
detection
milk,
which
97.6%-104.5%
98.4%-105.9%,
Moreover,
results
indicated
that
kana1-Apt
fragment
critical
recognition.
conclusion,
present
study
provide
novel
strategy
molecular
aptamers.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 6, 2025
Abstract
In
order
to
inhibit
non‐radiative
decay
pathways
of
covalent‐organic
frameworks
(COFs),
a
strategy
is
proposed
block
intralayer
conjugation
and
interlayer
π–π
stacking
by
using
flexible
aggregation‐induced
emission
(AIE)
building
blocks
(4′,4′′′,4′′′′′,4′′′′′′′‐(1,2‐ethenediylidene)
tetrakis[1,1′‐biphenyl]‐4‐carbaldehyde
(TFBE))
connected
weakly
conjugated
linker.
By
the
TFBE
as
changing
flexibility
linker,
TFBE‐COFs
with
different
luminescence
properties
are
obtained.
Experimental
theoretical
results
show
that
these
have
high
crystallinity
large
layer
spacing,
among
which
photoluminescence
quantum
yield
hydrazone
(Hz)‐COF
TFBE‐ODH
(oxalyl
dihydrazide
(ODH))
in
solid
state
reaches
26.28%,
superior
most
COFs
reported
so
far.
The
excellent
attributed
non‐planar
geometry
TFBE,
inhibits
quenching.
Moreover,
π‐electron
delocalization‐induced
leaps
suppressed
further
enhances
TFBE‐COFs.
Hz‐COF
exhibits
sensing
performance
for
trace
tetracycline,
detection
limit
0.15
µ
m
.
addition,
white
light‐emitting
diodes
coated
manufactured
achieve
high‐quality
light
emission.
This
study
provides
new
design
application
high‐emission
COFs.
