Stimuli-Chromic Oxazolidine Latex Nanoparticles for Dual-Responsive pH-Sensors and Rewritable Halochromic Papers: A Physicochemical Study on Colorimetric and Fluorimetric Signals
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 20, 2025
Oxazolidine
is
a
new
category
of
stimuli-chromic
compounds
that
has
unique
intelligent
behaviors
such
as
halochromism,
hydrochromism,
solvatochromism,
and
ionochromism,
all
which
have
potential
applications
for
designing
constructing
chemosensors
by
using
functionalized-polymer
nanocarriers.
Here,
the
poly(MMA-co-HEMA)
based
nanoparticles
were
synthesized
emulsion
copolymerizing
methyl
methacrylate
(MMA)
2-hydroxyethyl
(HEMA)
in
different
copolymer
compositions.
The
modified
physically
with
tertiary
amine-functionalized
oxazolidine
(as
an
pH-responsive
organic
dye)
to
prepare
halochromic
latex
nanoparticles.
Investigation
optical
properties
including
absorbance
emission
spectroscopic
methods
indicates
behavior
influenced
significantly
particle
size,
morphology,
concentration
hydroxyl
groups.
To
develop
detection
pH,
pH-responsivity
aqueous
solutions
pHs
wide
range
1–14
studied
UV–vis
fluorescence
spectroscopies,
these
results
confirmed
successful
photodetection
pH
fast
facile
manner.
investigation
solid-state
impregnation
latex-coated
cellulosic
papers
having
maintained
their
after
incorporation
cellulose
matrix
displayed
notable
colorimetric
fluorimetric
pH-responsivity.
Hence,
paper-based
pH-sensors
prepared
from
pH-responsivities
showed
constructed
HEMA
above
20
wt
%
best
high
resolution,
contrast,
high-intensity
color
change
change.
In
addition,
used
rewritable
hydrochromic
hand-writing
stamp-printing
acid
base
inks,
on
maximum
printability,
intensity.
This
study
proposed
significant
effects
polarity
functional
groups
molecules
role
functionalized
polymer
carrier
its
protection
toward
environmental
degradations.
These
parameters
should
be
considered
future
studies
development
pH-sensor
papers.
Language: Английский
Rapid Fluorescent Probe Detection of Magnesium Impurities in High-Purity Lithium Carbonate Brine Systems
Molecules,
Journal Year:
2025,
Volume and Issue:
30(4), P. 776 - 776
Published: Feb. 7, 2025
The
magnesium
impurities
in
lithium
carbonate
cannot
be
detected
quickly
an
aqueous
environment.
To
solve
this
bottleneck
problem,
study
proposes
a
new
method
for
the
rapid
detection
of
trace
Mg2+
using
water-soluble
fluorescent
probe.
A
probe
was
obtained
by
introducing
hydroxyl
groups
on
oxazole
ring.
After
modification,
hydrogen
bonding
between
and
water
molecules
increased
more
than
62
times.
Consequently,
energy
loss
outward
transfer
increased,
resulting
weak
fluorescence
saline
systems.
captured
N
ring
O
phenolic
group
through
1:1
coordination
ratio
within
structure.
attraction
complex
16
Additionally,
orbital
gap
reduced
from
2.817
to
0.383
eV.
Meanwhile,
impeded
phototropic
electron
effect
process,
enhanced
completing
process
3
10
s,
with
limit
6.06
μmol/L.
This
can
promote
real-time
quality
control
refining
purification
carbonate,
as
well
effectively
reduce
production
costs.
Language: Английский