Arabian Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
17(4), P. 105686 - 105686
Published: Feb. 15, 2024
In
this
work,
a
simple,
time
saving,
accurate
and
sensitive
method
for
the
direct
spectrophotometric
detection
of
cobalt
ion
using
two
new
fluorophore
azo
dyes,
R1
R2,
were
achieved.
The
based
on
complex
formation
between
Co(II)
these
compounds-based
fluorene
pyrene
moieties.
To
attain
optimal
conditions
ion,
several
parameters
such
as
effect
solvents,
pH,
reagent
concentration,
sequence
addition,
temperature
explored.
absorption
maximum
Co(II)-R1
orange
color
complexes
was
accomplished
at
472
nm
pH
8.97
universal
buffer
470
10.98,
respectively.
calibration
graphs
linear
over
concentration
range
0.2–3
0.4–3
µg
mL−1
Co(II)-R1,
respectively
with
stoichiometric
ratio
(1:2)
(Co2+:
reagent).
Various
statistical
analytical
including
molar
absorptivity,
limit
detection,
quantification,
precision
accuracy
estimated.
established
approach
efficiently
exploited
determination
in
some
water
samples.
findings
investigation
may
pave
way
advancements
sensor
technologies.
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
53(6), P. 2859 - 2866
Published: Jan. 1, 2024
This
study
highlights
the
uncomplicated
synthesis
of
a
coordination
polymer
that
exhibited
an
eye-catching
fluorometric
response
and
sensing
activity
towards
trivalent
cations.
Crystal Growth & Design,
Journal Year:
2024,
Volume and Issue:
24(3), P. 1410 - 1420
Published: Jan. 26, 2024
Herein,
a
new
three-dimensional
Eu-MOF,
[Me2NH2]2[Eu3(mtptc)2(CH3COO)3]·DMA·H2O
(1),
has
been
elaborately
prepared
through
the
reaction
of
europium
nitrate
and
symmetric
tetra-carboxylate
ligand,
5′-methyl-[1,1′:3′,1″-triphenyl]-3,3″,5,5″-tetracarboxylic
acid
(H4mtptc).
Noteworthily,
compound
1
represents
marked
stability
covering
acid–base
in
pH
range
2–14,
thermal
maintaining
skeleton
integrity
when
heated
at
350
°C,
solvent
some
common
solvents,
air
open
more
than
4
weeks
characterized
by
powder
X-ray
diffraction
(XRD)
temperature-dependent
XRD
analyses.
Remarkably,
luminescent
sensing
measurements
manifest
that
is
deemed
as
hopeful
fluorescent
probe
for
rapid
recognition
1-hydroxypyrene
(1-HP)
uric
(UA)
equipped
with
excellent
sensitivity
quenching
efficiency
99.1%
1-HP
97.4%
UA.
Besides,
performance
toward
UA
possesses
super
dimethylformamide/H2O
solution,
N-(2-hydroxyethyl)piperazine-N′-ethanesulfonic
buffer
human
urine.
Crystal Growth & Design,
Journal Year:
2024,
Volume and Issue:
24(5), P. 2064 - 2074
Published: Feb. 14, 2024
Two
novel
cobalt(II)-based
metal–organic
frameworks
(MOFs),
namely,
{[Co3(TTHA)(bibp)2(H2O)]}n
(1)
and
{[Co2(H2TTHA)(bidpe)2]}n
(2)
(H6TTHA
=
1,3,5-triazine-2,4,6-triamine
hexaacetic
acid,
bibp
4,4′-bis(imidazolyl)biphenyl,
bidpe
4,4-bis(imidazoly)diphenyl
ether),
were
hydrothermally
prepared
based
on
the
mixed
ligands
strategy
fully
characterized.
Due
to
rich
coordination
modes
of
carboxylic
acid
ligand,
1
possesses
a
three-dimensional
(3D)
structure
with
two
secondary
building
units
([Co3N3(CO2)4(CO)4]
[Co2N2(CO2)4]),
whereas
2
exhibits
tangled
one-dimensional
(1D)
chain
further
forms
3D
assembled
by
weak
interactions.
Interestingly,
can
serve
as
an
unusual
turn-on
sensor
for
detection
trivalent
metal
ions
(Al3+,
Cr3+,
Fe3+)
in
aqueous
solution
low
limit,
shows
high-sensitivity
fluorescence
turn-off
behavior
toward
polystyrene
styrene
biomarker
phenylglyoxylic
(PGA).
Significantly,
effectively
sense
PGA
complicated
biological
environments.
The
mechanism
study
indicated
that
absorbance-caused
enhancement
is
responsible
phenomena
induced
ions,
while
occurrence
structural
collapse
leads
effect
PGA.
CrystEngComm,
Journal Year:
2024,
Volume and Issue:
26(5), P. 577 - 593
Published: Jan. 1, 2024
Luminescent
metal–organic
frameworks
(LMOFs)
have
emerged
as
promising
luminescent
sensors
for
remarkable
and
selective
sensing
towards
Fe
3+
Cu
2+
via
a
“turn-off/turn-on”
strategy.
