Ukrainian Chemistry Journal,
Год журнала:
2024,
Номер
90(2), С. 67 - 80
Опубликована: Март 29, 2024
In
this
study,
a
series
of
condensed
derivatives
dehydroacetic
acid
with
chalcone
structure
were
synthesized
by
the
Knevenagel
reaction
using
isopropanol
as
solvent.
The
yield
was
30–75%.
It
shown
that
obtained
compounds
are
capable
chelating
rare
earth
metals,
including
La(III)
ions.
All
complexes
have
distorted
three
coordinated
ligands
according
to
MALDI
MS
spectral
data.
presence
water
molecules
in
confirmed
thermal
study
such
TG
and
DTA
is
dehydration
hydroxocomplexes
occurs
at
temperature
120–180
°C,
further
increase
300–400
°C
leads
destruction
organic
release
CO2
water.
According
Horowitz
–
Metzger
method,
activation
energy
process
metal
ion
La(L1)3⋅3H2O
complex
about
64.2
kJ/mol.
optical
properties
been
investigated
means
UV-Vis
spectroscopy
measurements,
demonstrating
induces
optically
more
favourites
behaviour
compared
starting
ligands.
varying
nature
substituents
length
polymethene
chain
composition
acid-based
chalcones
affects
their
properties.
molar
extinction
coefficient(ε)
values
ranged
from
2.4
105
L⋅mol-1⋅cm-1
5.5⋅105L⋅mol-1⋅cm-1,
suggests
strong
thedehydroacetic
acid-based
Further
modifications
antenna
moieties
for
development
highly
UV-Visible
progress
various
potential.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Янв. 28, 2025
The
inhibitory
potential
of
an
alcoholic
extract
derived
from
Canarium
strictum
leaves
(CSL)
was
evaluated
as
a
corrosion
inhibitor
for
mild
steel
(MS)
in
15%
HCl
solution.
Furthermore,
to
enhance
its
inhibition
effectiveness,
the
influence
potassium
iodide
(KI)
also
examined.
and
adsorption
characteristics
CSL
were
comprehensively
analysed
through
weight
loss
measurement,
electrochemical
impedance
measurement
(EIS),
potentiodynamic
polarization
(PP),
UV–visible
spectroscopy,
Fourier
transform
infrared
spectroscopy
(FTIR),
atomic
force
microscopy
(AFM),
scanning
electron
energy
dispersive
(SEM–EDS).
effect
temperature
immersion
time
on
investigated.
studied
exhibited
maximum
efficiency
92.2%
at
700
ppm
alone,
while
adding
5
KI
96.8%
observed.
Moreover,
with
KI,
98%
observed
extended
48
h.
PP
results
showed
that
+
good
mixed-type
system.
Adsorption
data
best
fitted
Langmuir
isotherm
model,
thermodynamic,
kinetic,
surface
analyses
shed
light
mechanism.
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
The
one-pot
synthesis
of
valuable
E
-chalcones
is
achieved
using
a
multifunctional
Ru@SiO
2
-[Pd–NHC]
catalytic
system
combining
molecular
and
nanoparticle
sites
for
efficient
carbonylative
Sonogashira
coupling
selective
hydrogenation.
Journal of Advanced Chemical Sciences,
Год журнала:
2025,
Номер
11(1), С. 832 - 837
Опубликована: Март 16, 2025
An
appropriate
conventional
method
was
employed
to
synthesize
a
new
oxime-based
ligand,
2,4-dihydroxybenzaldehyde
oxime,
and
its
transition
metal
(II)
complexes
with
Mn
Co
ions.
The
coordination
behavior,
bonding
nature,
crystal
structures
of
these
were
elucidated
using
spectroscopic
techniques,
including
FT-IR,
UV-Visible,
powder
X-ray
diffraction.
UV-Visible
spectral
analysis
suggests
that
both
exhibit
an
octahedral
geometry.
Additionally,
molecular
modeling
through
Density
Functional
Theory
(DFT)
calculations
provided
detailed
insights
into
their
electronic
properties,
stability
trends,
potential
reactivity.
optimized
structural
parameters,
bond
lengths
angles,
determined
DFT
the
B3LYP
functional
6-31G**,
6-311G**(d,p),
LanL2DZ
basis
sets.
