Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(5), С. 2087 - 2099
Опубликована: Янв. 24, 2024
In
the
present
work,
we
report
sensing
of
silver
ions
by
yellow
fluorescence
turn-off
in
poly-o-phenylenediamine
(POPD)
solution
via
an
oxidative
mechanism.
Poly-o-phenylenediamine
was
synthesized
chemical
polymerization
using
ferric
chloride
as
oxidizing
agent
ethanol
solvent.
Proton
nuclear
magnetic
resonance
spectra
POPD
revealed
two
types
protons
corresponding
to
benzenoid
and
quinonoid
structures
semioxidized
POPD.
Fourier
transform
infrared
(FT-IR)
confirmed
presence
quinoid
absorption
bands
poly-o-phenylenediamine.
Powder
X-ray
diffraction
(PXRD)
patterns
sharp
peaks
at
2θ
values
10.54
26.70°,
indicating
crystalline
nature
polymer.
Matrix-assisted
laser
desorption/ionization-time-of-flight
(MALDI-TOF)
analysis
indicated
5–6
repeating
monomeric
units
has
intense
water,
its
emission
quenched
upon
oxidation
with
AgNO3.
Fluorescence
naked-eye
detection
studies
have
that
analyte
polymer
molar
ratio
10
obtained
for
quenching.
The
shown
reductive
turn-on
specific
redox
analytes,
reversible
cyclic
voltammogram
electrochemically
states,
particularly
negative
voltage
sweep
solution.
oxidized
nonfluorescent,
reappeared
adding
NaBH4
Thus,
may
provide
attractive
strategy
various
oxidizing/reducing
analytes
water.
Chemistry - A European Journal,
Год журнала:
2023,
Номер
30(11)
Опубликована: Дек. 13, 2023
Abstract
We
report
a
rapid,
efficient,
and
scope‐extensive
approach
for
the
late‐stage
electrochemical
diselenation
of
BODIPYs.
Photophysical
analyses
reveal
red‐shifted
absorption
–
corroborated
by
TD‐DFT
DLPNO‐STEOM‐CCSD
computations
color‐tunable
emission
with
large
Stokes
shifts
in
selenium‐containing
derivatives
compared
to
their
precursors.
In
addition,
due
presence
heavy
Se
atoms,
competitive
ISC
generates
triplet
states
which
sensitize
1
O
2
display
phosphorescence
PMMA
films
at
RT
frozen
glass
matrix
77
K.
Importantly,
BODIPYs
demonstrate
ability
selectively
stain
lipid
droplets,
exhibiting
distinct
fluorescence
both
green
red
channels.
This
work
highlights
potential
electrochemistry
as
an
efficient
method
synthesizing
unique
emission‐tunable
fluorophores
broad‐ranging
applications
bioimaging
related
fields.
Molecules,
Год журнала:
2023,
Номер
28(14), С. 5604 - 5604
Опубликована: Июль 24, 2023
Fluorescent
nanoprobes
show
similar
fluorescence
properties
to
traditional
organic
dyes,
but
the
addition
of
nanotechnology
accurately
controls
size,
shape,
chemical
composition,
and
surface
chemistry
with
unique
characteristics
properties,
such
as
bright
luminescence,
high
photostability,
strong
biocompatibility.
For
example,
modifying
aptamers
or
antibodies
on
a
fluorescent
nanoprobe
provides
selectivity
specificity
for
different
objects
be
tested.
Fluorescence
intensity,
life,
other
parameters
targets
can
changed
by
sensing
mechanisms
based
structural
optical
nanoprobes.
What’s
more,
detection
is
cost-saving,
simple,
offers
great
advantages
in
rapid
food
detection.
Sensing
were
introduced
this
paper,
focusing
application
progress
pesticide
residues,
veterinary
drug
heavy
metals,
microbes,
mycotoxins,
substances
safety
recent
years.
A
brief
outlook
future
development
was
provided
well.
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(5), С. 2087 - 2099
Опубликована: Янв. 24, 2024
In
the
present
work,
we
report
sensing
of
silver
ions
by
yellow
fluorescence
turn-off
in
poly-o-phenylenediamine
(POPD)
solution
via
an
oxidative
mechanism.
Poly-o-phenylenediamine
was
synthesized
chemical
polymerization
using
ferric
chloride
as
oxidizing
agent
ethanol
solvent.
Proton
nuclear
magnetic
resonance
spectra
POPD
revealed
two
types
protons
corresponding
to
benzenoid
and
quinonoid
structures
semioxidized
POPD.
Fourier
transform
infrared
(FT-IR)
confirmed
presence
quinoid
absorption
bands
poly-o-phenylenediamine.
Powder
X-ray
diffraction
(PXRD)
patterns
sharp
peaks
at
2θ
values
10.54
26.70°,
indicating
crystalline
nature
polymer.
Matrix-assisted
laser
desorption/ionization-time-of-flight
(MALDI-TOF)
analysis
indicated
5–6
repeating
monomeric
units
has
intense
water,
its
emission
quenched
upon
oxidation
with
AgNO3.
Fluorescence
naked-eye
detection
studies
have
that
analyte
polymer
molar
ratio
10
obtained
for
quenching.
The
shown
reductive
turn-on
specific
redox
analytes,
reversible
cyclic
voltammogram
electrochemically
states,
particularly
negative
voltage
sweep
solution.
oxidized
nonfluorescent,
reappeared
adding
NaBH4
Thus,
may
provide
attractive
strategy
various
oxidizing/reducing
analytes
water.
