Abstract
Two
new
Schiff
bases
were
synthesized
from
1‐(2,4‐dihydroxyphenyl)ethanone
and
pyridine
derivatives.
Both
compounds
characterized
using
infrared,
UV–Vis.,
1
H
NMR,
13
C
NMR
mass
spectral
studies.
Density
functional
theory
(DFT)
calculations
performed
for
both
the
with
6‐31G(d,
p)
as
basis
set.
Vibrational
frequencies
calculated
theoretical
method
in
good
agreement
experimental
values.
highly
fluorescent
nature.
The
cation‐recognizing
profile
of
was
investigated
aqueous
methanol
medium.
base
4‐(1‐(pyridin‐4‐ylimino)ethyl)benzene‐1,3‐diol
(PYEB)
found
to
interact
Fe(III)
Cu(II)
ions,
whereas
4,4′‐((pyridine‐2,3‐diylbis(azanylylidene))bis(ethan‐1‐yl‐1‐ylidene))bis(benzene‐1,3‐diol)
(PDEB)
detect
ions.
mechanism
recognition
established
combined
excited
state
intramolecular
proton
transfer
(ESIPT)–chelation‐enhanced
fluorescence
(CHEF)
effect
chelation‐enhanced
quenching
(CHEQ)
process
detection
respectively.
stability
constant
metal
complexes
formed
during
sensing
determined.
limit
ions
respect
PYEB
be
1.64
×
10
−6
2.16
−7
M,
With
PDEB,
ion
4.54
−4
M.
property
PDEB
applied
bioimaging
studies
HeLa
cells.
Molecules,
Год журнала:
2023,
Номер
28(19), С. 6960 - 6960
Опубликована: Окт. 6, 2023
Toxic
cations,
including
heavy
metals,
pose
significant
environmental
and
health
risks,
necessitating
the
development
of
reliable
detection
methods.
This
review
investigates
techniques
approaches
used
to
strengthen
sensitivity
selectivity
Schiff
base
fluorescent
chemosensors
designed
specifically
detect
toxic
metal
cations.
The
paper
explores
a
range
strategies,
functional
group
variations,
structural
modifications,
integration
nanomaterials
or
auxiliary
receptors,
amplify
efficiency
these
chemosensors.
By
improving
towards
targeted
cations
achieving
heightened
limits,
consequently,
strategies
contribute
advancement
accurate
efficient
methods
while
increasing
end-use
applications.
findings
discussed
in
this
offer
valuable
insights
into
potential
leveraging
for
monitoring
various
fields,
monitoring,
biomedical
research,
industrial
safety.
Sensors & Diagnostics,
Год журнала:
2024,
Номер
3(3), С. 455 - 467
Опубликована: Янв. 1, 2024
The
development
of
a
probe
for
the
selective
recognition
trivalent
cations
Al
3+
and
In
has
recently
received
greater
attention
due
to
crucial
roles
these
metal
ions
play
in
many
biotic
material
processes.
Abstract
Detection
of
correct
oxidation
state
a
metal
ion
is
important
to
understand
its
speciation
and
redox
properties.
Some
rhodamine
derivatives
can
identify
Al
3+
,
Cr
Fe
as
the
trivalent
cations.
We
have
synthesized
derivative,
HL‐qui,
from
reaction
N‐(rhodamine‐6G)lactam‐ethylenediamine
with
quinoline‐2‐carboxaldehyde
for
colorimetric
well
fluorogenic
detection
all
ions
+3
such
Ga
In
Tl
Gd
.
presence
these
cations,
colorless
nonfluorescent
HL‐qui
turns
pink
strongly
fluorescent
in
HEPES
buffer
(10
mM)
H
2
O/ethanol=1/9
(v/v)
(pH
7.4)
spirolactam
ring
gets
open
show
changes
color
fluorescence
High
sensitivity
probe
towards
cations
reflected
limit
values
that
are
n
M
range.
To
best
our
knowledge,
there
no
report
where
sensing
has
been
utilized
determine
state.
This
multi‐ion
feature
used
fabrication
multi
input‐output
based
logic
circuit
using
Boolean
algebraic
method.
It
imaging
living
cell
(L6
cells).
Critical Reviews in Analytical Chemistry,
Год журнала:
2025,
Номер
unknown, С. 1 - 21
Опубликована: Фев. 19, 2025
Manganese
is
an
essential
metal
ion
involved
in
various
biological
and
environmental
processes,
but
its
excess
can
lead
to
toxicity,
particularly
affecting
the
nervous
system.
Therefore,
developing
selective
sensitive
detection
methods
for
Mn2+
ions
of
paramount
importance.
Colorimetric
fluorimetric
chemosensors
have
emerged
as
promising
tools
due
their
simplicity,
cost-effectiveness,
real-time
monitoring
capabilities.
This
review
discusses
recent
advances
colorimetric
that
exhibit
distinct
color
or
fluorescence
changes
upon
interaction
with
ions.
The
explores
different
organic
nanomaterials,
focusing
on
mechanisms
sensing,
sensitivity,
selectivity,
practical
applications
monitoring,
healthcare,
food
safety.
article
also
provides
insights
into
future
research
directions
aimed
at
overcoming
these
challenges,
improving
chemosensor
performance,
expanding
applicability
diverse
real-world
scenarios.
