VNU Journal of Science Natural Sciences and Technology,
Год журнала:
2023,
Номер
unknown
Опубликована: Ноя. 22, 2023
The
research
delineated
the
utilization
of
Cu-MOF
(HKUST-1)
as
a
proficient
heterogeneous
catalyst
for
selective
transformation
isoeugenol
to
licarin
A.
HKUST-1
was
synthesized
through
straightforward
methodology
and
its
structure
confirmed
by
various
characterization
employing
range
techniques,
including
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM)
with
Energy
Dispersive
analysis
(EDX),
N2
adsorption/desorption.
exhibited
outstanding
catalytic
efficacy
in
oxidation
isoeugenol,
resulting
75%
yield
A
under
mild
conditions
presence
TBHP.
Furthermore,
demonstrated
stability,
retaining
activity
after
being
reused
at
least
four
times
without
deterioration.
Applied Organometallic Chemistry,
Год журнала:
2024,
Номер
38(12)
Опубликована: Авг. 20, 2024
ABSTRACT
Inspired
by
the
multienzymatic
relay
catalysis
in
nature,
herein,
we
reported
a
pioneering
bio‐inspired
Cu/Pd
bimetallic
composite
microspheres
(Cu/CMC@Pd/C)
as
simple
and
efficient
catalyst
for
homo‐coupling
of
arylboronic
acids.
In
this
composite,
Pd/C
was
encapsulated
Cu(II)‐crosslinking
carboxymethyl
cellulose
(Cu/CMC).
Cu/CMC@Pd/C
were
easily
achieved
adding
mixture
solution
into
Cu(II)
through
an
ion
exchange
reaction
between
carboxylate
groups
CMC
ions.
The
morphology
composition
as‐prepared
well
characterized
using
various
analytical
tools
such
FT‐IR,
XRD,
XPS,
SEM,
TEM,
elemental
mapping,
EDS,
ICP‐AES.
analysis
indicated
that
have
porous
structure
is
uniformly
distributed
within
interior
microspheres.
facilitates
mass
transfer
substrate
increases
contact
area
catalyst,
thus
improving
efficiency.
performance
assessed
acid
synthesis
symmetric
biaryl
without
need
aryl
halide
partner.
This
process
mimics
multienzyme
Cu(I)‐catalyzed
halogenation
one
portion
Pd(0)‐catalyzed
Suzuki–Miyaura
cross‐coupling
situ
generated
another
acid.
results
showed
has
excellent
catalytic
activity
with
tolerance
broad
functional
groups,
producing
desired
symmetrical
biaryls
yields
short
time
under
mild
conditions.
Moreover,
can
be
recovered
filtration
still
good
after
six
cycles.
Consequently,
innovative
pseudo‐homogeneous
emerges
convenient
alternative
asymmetric
biaryls.
Gels,
Год журнала:
2024,
Номер
10(12), С. 758 - 758
Опубликована: Ноя. 23, 2024
In
this
study,
a
novel
polyacrylate-co-vinyl
imidazole
hydrogel-supported
palladium
(Pd)
catalyst
(P(AA-co-VI)@Pd)
was
prepared
through
heat-initiated
polymerization,
starting
with
the
formation
of
complex
between
vinyl
and
chloride,
followed
by
addition
75%
neutralized
acrylic
acid
(AA),
crosslinking
agent,
initiator.
The
structure
morphology
were
characterized
using
ICP-OES,
SEM,
EDX,
Mapping,
FT-IR,
TGA,
XRD,
XPS
TEM
techniques.
It
confirmed
that
exhibited
excellent
compatibility
water
solvent
uniform
distribution
Pd.
P(AA-co-VI)@Pd
hydrogel
demonstrated
remarkable
catalytic
activity
ease
separation.
Notably,
in
Tsuji-Trost
reaction,
employing
as
solvent,
it
achieved
conversion
rate
high
94%
at
very
low
dosages,
indicating
its
superior
performance.
Moreover,
after
six
consecutive
cycles,
maintained
good
structural
stability,
highlighting
exceptional
reusability
environmental
friendliness.
Furthermore,
outstanding
efficiency
also
observed
Suzuki
coupling
reaction
where
both
yield
reached
100%
99%,
respectively,
within
just
one
hour
time,
thus
further
validating
universality
efficacy
across
various
chemical
reactions.
